Tag: C++

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Sep 17, 2026 17 min read Beginner

C++ enum class: Scoped Enums, Underlying Types, Exhaustive switch, and Stable Serialized Values

Strongly typed scoped enums in C++11 and later: no implicit int conversion, explicit underlying types, switch exhaustiveness warnings that actually fire, type-safe bit flags, and keeping stored enum values stable.
Sep 17, 2026 45 min read Intermediate

C++ Memory Leaks: Causes, Detection, and Prevention

Understand heap leaks: lost pointers, exception paths, shared_ptr cycles. Valgrind, ASan/LSan, heap profilers, Visual Studio, RAII, suppression files, and CI.
Sep 17, 2026 20 min read Intermediate

C++ RAII Explained | Why Constructors and Destructors Prevent Leaks

A deep dive into C++ RAII grounded in a real production connection-leak incident, covering exception safety, the C++ Core Guidelines, and composable ownership.
Sep 17, 2026 42 min read Intermediate

shared_ptr and weak_ptr Internals: Control Blocks, Cycles, enable_shared_from_this and Aliasing

std::shared_ptr reference counting, control blocks, weak_ptr observers, cycles, enable_shared_from_this, aliasing, custom deleters, and production patterns in modern C++.
Sep 17, 2026 11 min read Intermediate

C++ Casting

When to use static_cast, dynamic_cast, const_cast and reinterpret_cast, what each checks, the undefined behavior they hide, and where std::bit_cast fits.
Sep 17, 2026 32 min read Intermediate

std::unique_ptr: Exclusive Ownership, make_unique, Custom Deleters and Moving Ownership

std::unique_ptr explained: RAII, make_unique, custom deleters, arrays, move semantics, PIMPL, containers, and exception-safe factories.
Sep 15, 2026 20 min read Beginner

C++ Algorithm Reverse: std::reverse, reverse_copy &

Reverse ranges in place or into a copy with std::reverse and reverse_copy; rotate segments with std::rotate — palindromes, string reversal, and array.
Sep 15, 2026 17 min read Advanced

C++ Inline Assembly: GCC Extended asm, Constraints and Clobbers, and Why Intrinsics Usually Win

C++ inline assembly (asm): GCC/Clang extended asm with constraints and clobbers, why MSVC x64 has no inline asm, CPUID/RDTSC done correctly, the optimizer rules that break asm blocks, and the intrinsics that replace most of them.
Sep 15, 2026 15 min read Advanced

C++20 Template Lambdas: []<typename T> Syntax, Concept Constraints and When They Beat auto

C++20 template lambdas: `[]<typename T>(T a, T b)`, concepts constraints, parameter packs, and when they beat generic `auto` lambdas.
Sep 11, 2026 24 min read Intermediate

VDA5050 for AGV/AMR Fleets: MQTT Topics, Order and State Messages, and a C++ Implementation

How VDA5050 standardizes AGV/AMR fleet communication over MQTT — topic structure, order/state messages, the Node/Edge/Action model, and a C++ implementation with libVDA5050++.
Sep 8, 2026 28 min read Intermediate

C++ WebSocket Deep Dive | Handshake· Frames

Production WebSocket in C++: NAT idle timeouts, strict RFC 6455 handshakes, frame-level examples, heartbeat design, Beast patterns, backpressure.
Sep 7, 2026 20 min read Intermediate

C++ GDB: A Practical Debugger Guide

C++ GDB guide: breakpoints, stepping, variables, backtraces, -g builds, core dumps, and multithreaded debugging—with real examples.
Sep 7, 2026 17 min read Intermediate

C++ Generic Lambdas — auto Parameters and Template Lambdas

Generic lambdas in C++14: auto makes operator() a template, C++20 template lambdas, STL patterns, deduction rules, performance, and common pitfalls.
Sep 7, 2026 19 min read Intermediate

C++ GUI | Beginner Guide to the Qt Framework

Qt C++ GUI: QApplication, signals/slots, layouts, custom widgets, menus, and sample apps. Build with qmake or CMake and avoid common pitfalls.
Sep 7, 2026 11 min read Intermediate

C++14 Init Capture: Moving unique_ptr into Lambdas, Reference Init and Evaluation Time

C++14 init capture [x = expr]: auto-style deduction, when it runs, moving unique_ptr in, why std::function rejects it, [&r = x], [*this] and pack capture.
Sep 7, 2026 26 min read Intermediate

C++ Technical Interview

C++ technical interviews expect you to explain pointers, RAII, virtual functions, STL, and concurrency verbally.
Sep 7, 2026 16 min read Intermediate

C++ Lambda Capture: By Value, By Reference, Init Capture, and the Lifetime Bugs Each One Invites

How C++ lambda captures really work: copies taken at creation time, [=] silently capturing this, mutable state duplicated by std::function, move-only captures, and dangling references.
Sep 7, 2026 24 min read Intermediate

C++ Lambda Expressions | · capture

C++ lambda expressions: [=]·[&] capture, sort and find_if usage, mutable, generic lambdas, threads, and dangling-reference pitfalls—practical guide.
Sep 7, 2026 28 min read Intermediate

WebSocket in C++ with Boost.Beast: Handshake, Frames, Ping/Pong and Common Failures

Solve real-time bidirectional communication in C++: WebSocket handshake and raw frames, Boost.Beast, Ping/Pong with timeouts, common errors, best.
Sep 6, 2026 16 min read Intermediate

C++ Filesystem Explained | std::filesystem (C++17) guide

A practical guide to std::filesystem operations: directory iteration, copy/remove, space queries, symlinks, TOCTOU races, and error-handling trade-offs.
Aug 20, 2026 22 min read Beginner

Go in 2 Weeks #05

Go error handling vs C++ try/catch: multiple returns, if err != nil, defer, fmt.Errorf %w, errors.Is/As, panic/recover. Practical examples for production.
Aug 19, 2026 35 min read Intermediate

vcpkg for Reproducible C++ Builds: Manifest Mode, Triplets, Versioning and Overlay Ports

Hands-on C++ vcpkg primer: install, Manifest mode, triplets, versioning, custom overlay ports, CMake toolchain, and common errors—reproducible builds.
Aug 19, 2026 32 min read Intermediate

C++ Conan Basics — Install, conanfile, Profiles, CMake

Conan 2.x for C++: install, conanfile.txt/py, profiles, remotes, CMake toolchain, package basics, errors, CI, and reproducible builds.
Aug 19, 2026 40 min read Advanced

C++ Build Systems Compared: CMake, Meson, Bazel, and Makefile

Practical comparison of C++ build systems: CMake, Meson, Bazel, and Makefile, plus vcpkg vs Conan—trade-offs, errors, migration, and CI patterns.
Aug 18, 2026 16 min read Intermediate

C++ Regular Expression Basics: std::regex Matching, Capture Groups and Tokenizing

A beginner-focused introduction to std::regex: the regex_match vs regex_search mistake almost everyone makes first, how capture groups are indexed, and the raw-string habit that avoids double-escaping bugs.
Aug 18, 2026 28 min read Intermediate

C++ [[nodiscard]] Guide: Ignore Return Values Safely

Turn ignored return values into compiler warnings with [[nodiscard]]: error codes, RAII guards, factories, C++20 reason strings, and missing-warning cases.
Aug 18, 2026 16 min read Advanced

C++ Performance Optimization: Measure First, Then Copies, Allocations, Cache and Compiler Flags

A measured approach to C++ performance: profile first, remove hidden copies, reserve allocations, fix memory access order, and use -O2/-O3, -march and LTO without the common traps.
Aug 18, 2026 22 min read Intermediate

C++ vs Go | Performance, Concurrency, and Selection Guide

C++ vs Go: performance, concurrency, and practical selection — scenarios, models, pitfalls, and production patterns for backend and systems work.
Aug 18, 2026 45 min read Intermediate

C++ DB Engine Fundamentals: Storage Engine and Query Parser

How a database engine fits together: storage engine, SQL parser, executor, and transactions. B-Tree indexes, paging, WAL, ACID, and minimal C++ examples.
Aug 18, 2026 45 min read Advanced

C++ Query Optimization Guide | Index Selection· Plans

C++ query optimization: index selection, EXPLAIN plans, statistics, cost models, and production patterns [#49-3].
Aug 18, 2026 40 min read Advanced

C++ Advanced Profiling Guide | perf· gprof

When your multithreaded C++ game server burns 60% CPU and you cannot find the bottleneck: perf, gprof, Valgrind, VTune, Tracy, flame graphs, cache misses.
Aug 17, 2026 13 min read Intermediate

C++ scoped_lock — Scoped locking, std::lock, and deadlock

Lock several mutexes at once with C++17 std::scoped_lock to avoid deadlock, and when lock_guard or unique_lock fits better, with a bank-transfer example.
Aug 17, 2026 25 min read Beginner

C++ Compilation Pipeline — Preprocessing and Compilation

C++ build pipeline: preprocess, compile, assemble, link; static vs dynamic libs; fix undefined reference and common linker errors.
Aug 17, 2026 28 min read Intermediate

C++ Smart Pointers

C++ smart pointers: unique_ptr, shared_ptr, weak_ptr, make_unique, make_shared—fix circular references when memory grows despite no Valgrind leak.
Aug 17, 2026 32 min read Intermediate

C++ string fundamentals — std::string and C strings

C++ strings: std::string ops, C-string comparison with strcmp (not ==), string_view lifetimes, common bugs, and performance tips—with runnable examples.
Aug 17, 2026 22 min read Intermediate

C++ Package Managers: Escape “Library Install Hell” with

C++ package managers explained: vcpkg and Conan for dependencies, CMake integration, manifests, triplets, profiles, CI, caches, and production patterns.
Aug 17, 2026 28 min read Advanced

C++20 Concepts | Making Template Error Messages Readable

C++20 Concepts: clearer errors than SFINAE/enable_if—standard concepts, requires clauses, overloads, and practical C++20 examples.
Aug 17, 2026 20 min read Advanced

C++ Custom Ranges

C++ custom ranges: satisfy std::ranges::range with begin/end, iterators, adaptors, sentinels, view_interface, pitfalls, and production patterns.
Aug 17, 2026 35 min read Intermediate

C++ std::chrono Guide — duration, time_point, Clocks &

Replace time() with std::chrono: duration, time_point, system_clock, steady_clock, duration_cast, benchmarks, timeouts, and log timestamps.
Aug 16, 2026 12 min read Intermediate

C++ RVO and NRVO: Copy Elision, Performance, and Why return

RVO vs NRVO, C++17 guaranteed elision for prvalues, why std::move on return blocks NRVO, benchmarks, and a practical checklist.
Aug 16, 2026 14 min read Advanced

C++ Exception Safety — Basic, Strong, and Nothrow Guarantees

C++ exception safety: basic, strong, and nothrow guarantees, RAII, copy-and-swap, destructor rules, and common pitfalls—with concise examples.
Aug 16, 2026 15 min read Intermediate

C++ extern Linkage — External vs Internal Linkage, extern

C++ extern linkage: external vs internal linkage, extern "C", ODR-safe headers, const globals, namespaces, and explicit template instantiation.
Aug 16, 2026 20 min read Intermediate

C++ Mutex & Lock — Mutual Exclusion and lock_guard

C++ mutex and locks: std::mutex, lock_guard, unique_lock, std::lock, scoped_lock, recursive_mutex, timed_mutex, and avoiding deadlocks.
Aug 16, 2026 17 min read Intermediate

C++ Range-Based for: auto, References, and Temporaries

Range-based for in C++: auto vs auto& vs const auto&, proxy iterators, temporaries, C++17 structured bindings, custom begin/end, and production patterns.
Aug 15, 2026 15 min read Intermediate

C++ Move Errors

Understand use-after-move, what std::move really does, move constructors, RVO, and ten common mistakes—so you can fix crashes and avoid undefined behavior.
Aug 15, 2026 11 min read Beginner

Range-Based for Loop Errors in C++: Missing begin()/end() and Eight Other Pitfalls

Fix C++ range-for errors: "begin was not declared in this scope", const begin(), vector<bool> proxies, decayed arrays, map pair copies and dangling temporaries.
Aug 15, 2026 13 min read Intermediate

C++ auto Type Deduction Errors

Fix C++ auto type deduction issues: why references and const drop, when to use auto& and auto&&, eight common compiler errors, and AAA-style guidelines.
Aug 4, 2026 14 min read Intermediate

C++ Circular References: shared_ptr Leaks and Breaking

Why shared_ptr cycles leak memory, how weak_ptr breaks cycles, parent/child and cache/observer patterns, use_count debugging, Valgrind, and ASan.
Jul 27, 2026 16 min read Intermediate

C++ File Status | 'File Status' Guide

C++17 std::filesystem file_status·perms, status and symlink_status, file_type·permission checks, backup·log cleanup practice, Windows and POSIX.
Jul 26, 2026 10 min read Intermediate

Missing Virtual Destructor: Why Deleting Through a Base Pointer Leaks or Worse

Why deleting via a base pointer without a virtual destructor is undefined behavior, what GCC warns about, why unique_ptr<Base> hits it but shared_ptr hides it.
Jul 26, 2026 10 min read Intermediate

C++ Object Slicing: How Copying Through a Base Type Loses Data and Polymorphism

How C++ object slicing silently drops derived data in by-value parameters, vector<Base>, catch by value and base assignment, and how to make it a compile error.
Jul 26, 2026 10 min read Intermediate

"undefined reference to vtable": What the Linker Is Telling You and How to Fix It

Why GCC reports "undefined reference to vtable for X": the key function rule, undefined virtual destructors, unlinked .cpp files and Qt moc, and each fix.
Jul 26, 2026 14 min read Intermediate

C++ Name Hiding: Why a Derived Function Hides Base Overloads and How using Fixes It

Why a derived-class function hides every base-class overload with the same name, why the dangerous case compiles and silently calls the wrong function, and how using-declarations and -Woverloaded-virtual prevent it.
Jul 26, 2026 14 min read Advanced

C++23 std::expected: Returning Errors as Values, Monadic Chaining, and Access Pitfalls

How std::expected<T, E> carries a value or a typed error, when it beats exceptions, how and_then/transform/or_else chain, and the UB and conversion traps.
Jul 26, 2026 18 min read Intermediate

C++ Function Pointer | 'Function Pointer' Guide

C++ function pointers explained: declaration syntax, using aliases, callbacks with void* context, dispatch tables, sort comparators, member function pointers, and when to use std::function or templates instead.
Jul 26, 2026 13 min read Beginner

C++ nullptr | 'Null Pointer' Guide

Why C++11 replaced NULL and 0 with nullptr: the overload bug NULL causes, what std::nullptr_t is, nullptr in templates and APIs, and migrating old code.
Jul 26, 2026 15 min read Intermediate

C++26 Is Finalized: Reflection, Contracts, std::execution and Other Key Changes

What C++26 adds: static reflection, Contracts, erroneous behavior for uninitialized reads, standard library hardening, and std::execution, with code examples, the compiler situation as of September 2026, and what existing projects can do now.
Jul 25, 2026 20 min read Intermediate

Implementing Data Structures in C++: Linked List, BST, and Hash Table, and the Bugs Each One Hides

Implementing a linked list, binary search tree, and open-addressing hash table in C++ from scratch, with the problems textbook versions skip: copy semantics and double deletes, recursion depth on sorted input, deletion in linear probing, and cache behavior.
Jul 25, 2026 10 min read Beginner

C++ Default Arguments: Rules, Virtual Function Traps, and API Design

How C++ default arguments work: trailing-only rules, header vs .cpp placement, call-site substitution, overload ambiguity, and the virtual function trap.
Jul 25, 2026 11 min read Advanced

Design Patterns in Modern C++: What Singleton, Factory, Observer, Strategy and Visitor Look Like After C++17

How GoF patterns change in modern C++: Meyers singleton and its test traps, factory registries, observer re-entrancy, visitor as std::variant, CRTP.
Jul 25, 2026 16 min read Beginner

Setting Up a C++ Development Environment: OS, Hardware, IDE, Compilers and Sanitizers

Choosing and configuring a C++ development environment: which OS and hardware matter for build times, GCC vs Clang vs MSVC, CMake with Ninja and compile_commands.json, IDE and clangd setup, sanitizers, faster builds with ccache and a faster linker, and keeping local and CI toolchains aligned.
Jul 25, 2026 11 min read Intermediate

C++ Dynamic Initialization: When Globals and Statics Run Their Initializers

What makes a C++ initializer dynamic, when it runs relative to main, ordering within and across files, exceptions before main, local statics, and constinit.
Jul 25, 2026 20 min read Advanced

C++ EBCO and [[no_unique_address]]

Why an empty class still takes a byte, how EBCO removes it for bases, and how C++20 [[no_unique_address]] does it for members, with sizeof checks and ABI notes.
Jul 25, 2026 15 min read

Why Visual Studio C++ Builds Are Slow: PCH, /MP, Incremental Linking and Forward Declarations

Speed up slow Visual Studio C++ builds: precompiled headers, incremental linking, parallel compilation, and other settings that cut build time.
Jul 25, 2026 11 min read Beginner

Fixing "multiple definition" Linker Errors in C++: ODR, Header Definitions and inline

Why C++ code that compiles fails to link with "multiple definition of" (LNK2005 on MSVC), why header guards do not help, and when to use inline or extern.
Jul 25, 2026 12 min read Beginner

"passing const as this discards qualifiers": Ten C++ const Errors and Their Fixes

Ten real GCC const errors, from "discards qualifiers" to "cannot bind non-const lvalue reference": what each message means and the fix, not const_cast.
Jul 25, 2026 11 min read Intermediate

Lambdas That Crash Later: Dangling Reference Captures and How to Capture Safely

Why a stored C++ lambda crashes long after creation: dangling [&] captures, the hidden this in [=], move-only captures and std::function, and safe patterns.
Jul 24, 2026 9 min read Beginner

C++ struct vs class: The One Language Difference and the Conventions Built on It

struct and class differ only in default member and base-class access. What that means for inheritance, POD and aggregates, and when to pick which keyword.
Jul 24, 2026 17 min read Intermediate

C++ malloc vs new vs make_unique

C++ malloc vs new vs make_unique compared: constructor calls, type safety, failure behavior (nullptr vs bad_alloc), alignment, operator new overloading, and why make_unique is the default in modern C++.
Jul 24, 2026 12 min read Intermediate

std::condition_variable: Waiting on Events Without Spurious Wakeup and Lost Notify Bugs

How std::condition_variable really works: predicates, spurious wakeups, lost notifications, notify_one vs notify_all, timeouts and a clean shutdown path.
Jul 24, 2026 11 min read Advanced

C++17 constexpr Lambdas: Implicit constexpr, Captures, and Limits

How C++17 constexpr lambdas work: when a lambda is implicitly constexpr, capture rules for constant evaluation, real GCC errors, and C++20 changes.
Jul 24, 2026 18 min read Advanced

C++ Custom Deleters | 'Custom Deleter' Guide

When custom deleters are needed, comparing function pointers·lambdas·function objects, differences in type·storage between unique_ptr and shared_ptr.
Jul 23, 2026 13 min read Intermediate

Cache Eviction Beyond LRU: FIFO, Clock, Random and MRU in C++ with a Trace Simulator

FIFO, LRU, Clock, Random and MRU eviction implemented in C++ and replayed on the same traces: Bélády's anomaly, loops larger than the cache, scans and skew.
Jul 23, 2026 12 min read Advanced

C++20 Calendar and Time Zones: year_month_day, zoned_time and DST Pitfalls

C++20 chrono dates and time zones: calendar vs day arithmetic, the Jan 31 + 1 month problem, weekdays, zoned_time conversion, DST gaps and overlaps.
Jul 23, 2026 13 min read Intermediate

std::call_once and once_flag: Thread-Safe One-Time Initialization vs static Locals

std::call_once is a C++11 function that guarantees a function executes exactly once, even when called from multiple threads.
Jul 23, 2026 9 min read Beginner

Fast C++ I/O for Coding Tests: What sync_with_stdio, cin.tie and endl Actually Do

Why default C++ iostreams can cause TLE, what sync_with_stdio(false) and cin.tie(nullptr) change, and the traps: mixing printf, getline, interactive flushing.
Jul 23, 2026 13 min read

Modern C++ Syntax Cheatsheet: C++11 to C++20 Features and Their Pitfalls

Scannable modern C++ reference: each C++11/14/17/20 feature with the standard that added it, a snippet verified on g++ 10.3, and the pitfall that bites.
Jul 23, 2026 18 min read Intermediate

Measuring C++ Code Coverage: gcov, lcov Reports, Google Test and CI Uploads

Measuring C++ code coverage and wiring it into CI: coverage types, gcov and lcov HTML reports, Google Test integration, Codecov uploads, and a comparison of tools.
Jul 23, 2026 25 min read Beginner

10 C++ Compile and Link Errors Beginners Hit First, and What Each Message Means

Ten common C++ compile and link errors for beginners: undefined reference, segmentation fault, redefinition, no matching function, undeclared identifiers and more, with what causes each one.
Jul 23, 2026 18 min read Intermediate

vector vs list vs deque: Why Cache Locality Usually Beats Big-O

Choosing between C++ STL vector, list and deque: internal layouts, time complexity, real benchmarks showing cache effects, and a situation-by-situation selection guide.
Jul 22, 2026 14 min read Intermediate

Reading CMake Errors by Phase: Compiler Detection, find_package, Missing Targets, Link Failures and Stale Caches

Real CMake errors decoded by phase: No CMAKE_CXX_COMPILER could be found, missing package config, Cannot find source file, undefined references, stale caches.
Jul 22, 2026 50 min read Advanced

Debugging Crashes with Core Dumps: Enabling Them, Reading Them in GDB, Collecting Them in Production

Core dumps for crash debugging: enabling generation, analyzing with GDB, walking through segmentation fault scenarios, and collecting dumps safely in production.
Jul 22, 2026 11 min read Intermediate

std::set_union, set_intersection and set_difference on Sorted Ranges: Duplicates, Comparators and Silent Wrong Output

How the STL set algorithms merge two sorted ranges in one pass, how they treat duplicates, and why unsorted input or a mismatched comparator fails silently.
Jul 22, 2026 14 min read Advanced

C++ Alignment and Padding: Why sizeof Surprises You, alignas, #pragma pack and False Sharing

Where struct padding comes from, how member order changes sizeof, what alignas and #pragma pack really do, why packed structs are risky, and false sharing.
Jul 22, 2026 13 min read Intermediate

C++ Attributes: nodiscard, deprecated, maybe_unused, likely, fallthrough and noreturn

What each standard C++ attribute actually does, the exact GCC warnings it triggers, and the traps: nodiscard gaps, misused likely, noreturn that returns.
Jul 22, 2026 11 min read Advanced

C++20 std::latch and std::barrier: Start Gates, Phased Work and Clean Exits

When to use C++20 std::latch vs std::barrier: start gates, phase loops with a completion step, arrive_and_drop, exception-safe count_down and count bugs.
Jul 22, 2026 24 min read Intermediate

C++ Bit Manipulation: Bitmasks, std::bitset, Bit Fields and Bitmask DP

Bit operations (AND, OR, XOR, shift) are low-level techniques used for flags, bitmasks, and algorithm optimization.
Jul 22, 2026 11 min read Advanced

C++ Branch Prediction: Measuring Mispredictions, cmov, [[likely]] and PGO

How branch mispredictions slow C++ loops, why the sorted-array trick depends on your compiler, and when cmov, [[likely]], partitioning or PGO actually help.
Jul 17, 2026 5 min read Advanced

static, extern, const, constexpr, inline, volatile, mutable: What Each C++ Keyword Changes

A practical rundown of C++ storage and type-qualifier keywords - static, extern, const, constexpr, inline, volatile, and mutable - with what each one actually changes about linkage and lifetime.
Jul 17, 2026 5 min read Advanced

static Functions in C++: Class Statics vs File-Scope Statics, Linkage and the ODR

How static functions behave in C++ - class static member functions, file-scope static functions and internal linkage, ODR implications, and their effect on memory layout and performance.
Jul 16, 2026 13 min read Intermediate

C++ Stack Overflow: Recursion, Large Locals, and How to Fix

Why C++ programs overflow the stack, from runaway recursion to large local arrays, and how to fix it with ulimit or /STACK, heap allocation or iteration.
Jul 16, 2026 13 min read Beginner

C++17 Structured Bindings: How auto [a, b] Works, What It Copies, and Where It Dangles

How C++17 structured bindings decompose pairs, tuples, arrays and structs, what auto vs auto& really copies, where they dangle, and how to make a type bindable.
Jun 25, 2026 18 min read Beginner

Go in 2 Weeks #04: Interfaces, Duck Typing, any and Type Assertions

Go interfaces vs C++ virtual functions: implicit satisfaction, method sets and receivers, io.Reader/io.Writer, small interfaces, any, type assertions, and type switches.
Jun 25, 2026 20 min read Intermediate

Go in 2 Weeks #06: Goroutines, Buffered vs Unbuffered Channels, select and Worker Pools

Goroutines and channels for C++ developers: the scheduler, unbuffered vs buffered semantics, select and timeouts, worker pools, and deadlocks and leaks.
Jun 24, 2026 18 min read Beginner

Go in 2 Weeks #01: Go's Philosophy and Core Syntax for C++ Developers

Go tutorial for C++ devs: install Go, := and var, for/range, garbage collection, go fmt, packages, and modules—side by side with C++.
Jun 24, 2026 15 min read Beginner

Go in 2 Weeks #02: Pointers Without Arithmetic, Slices vs std::vector, and Maps

Go pointers, slices, and maps for C++ developers: safe *T, len/cap/append, map lookup with ok, and how slices differ from std::vector.
Jun 24, 2026 14 min read Beginner

Go in 2 Weeks #03: Structs, Methods, Pointer vs Value Receivers and Embedding Instead of Inheritance

No class keyword in Go: structs, methods, pointer vs value receivers, embedding, and NewXxx constructors compared to C++.
Jun 23, 2026 9 min read Advanced

Variadic Templates in C++: Parameter Packs, Pack Expansion, sizeof... and Fold Expressions

C++ variadic templates explained: parameter packs, where pack expansion is allowed, recursion vs fold expressions, empty packs, and the errors you will hit.
Jun 23, 2026 13 min read Advanced

C++17 std::variant: Access, std::visit, valueless_by_exception and Conversion Traps

Using std::variant safely: get vs get_if, std::visit with overloaded{}, why a double can silently hit your int handler, valueless variants and size cost.
Jun 23, 2026 15 min read Advanced

C++20 Views: How Lazy Pipelines Evaluate, and the Lifetime and Caching Traps

C++20 std::views explained by how they evaluate: filter, transform, take, and drop pipelines, why adapter order changes results, why transform before filter runs twice, and the dangling and const-iteration traps.
Jun 23, 2026 18 min read Intermediate

C++ Virtual Functions: Polymorphism, override, and Pure

Virtual functions in C++: dynamic dispatch, virtual vs non-virtual, pure virtual and abstract classes, virtual destructors, vtables, and slicing pitfalls.
Jun 23, 2026 14 min read Advanced

C++ Visitor Pattern Explained | Double Dispatch

Visitor pattern in modern C++: classic accept/visit vs std::variant + std::visit (C++17), ASTs, the expression-problem tradeoff between adding types and adding operations, and the pitfalls in each.
Jun 23, 2026 10 min read Beginner

C++ vs Python: Which Language Should You Learn?

C++ vs Python compared for beginners: speed, difficulty, memory, jobs, and learning curves—with benchmarks, checklists, and when to pick each language.
Jun 23, 2026 15 min read Advanced

C++ VTable Explained: Virtual Function Tables & Dynamic Dispatch

How C++ vtables and vptrs implement polymorphism: indirect calls, object size, multiple inheritance costs, the missing-virtual-destructor leak, and optimization with final and NVI.
Jun 23, 2026 8 min read Beginner

C++ Zero Initialization: When Objects Start at Zero and When They Don't

Which C++ objects are zero-initialized automatically, why locals are not, how T{} triggers it, why memset is not equivalent, and its role in static init order.
Jun 22, 2026 8 min read Intermediate

C++ Use-After-Free (UAF): Causes, ASan, and Ownership Rules

Why use-after-free bugs in C++ hide until much later, the patterns that cause them (invalidation, escaped raw pointers, callbacks), and how ASan pinpoints them.
Jun 22, 2026 14 min read Intermediate

C++ User-Defined Literals: Raw vs Cooked Operators, Unit Types and consteval Validation

How C++ picks a literal operator, why suffixes need an underscore, raw vs cooked forms, unit types, and consteval literals that reject typos at build time.
Jun 22, 2026 8 min read Beginner

C++ using vs typedef: Alias Templates, Function Pointers, and the const Trap

How C++ using and typedef differ: alias templates, readable function pointer types, the const-pointer typedef trap, and why an alias never creates a new type.
Jun 22, 2026 13 min read Intermediate

Valgrind for C++: Reading Memcheck Output, Leak Kinds, and When to Use ASan Instead

Run Valgrind Memcheck on C++ code, read its reports line by line, tell definitely lost from still reachable, write suppressions, and know when ASan fits better.
Jun 22, 2026 17 min read Beginner

C++ Value Initialization | Empty {} and ()

Value initialization uses empty () or {}. Scalars become zero-like; classes call the default constructor.
Jun 21, 2026 14 min read Advanced

C++ tuple apply | 'Application of tuples' guide

A guide to C++17 std::apply for unpacking tuples into function arguments, with practical examples for variadic function calls.
Jun 21, 2026 9 min read Intermediate

C++ Type Conversions: Implicit Rules, static_cast, explicit, and Conversion Operators

How C++ converts types: promotions, narrowing, signed/unsigned traps, converting constructors, conversion operators, the one user-defined conversion rule.
Jun 21, 2026 25 min read Advanced

Type Erasure in C++: How std::function and std::any Work, and Building Your Own

How std::function and std::any hide concrete types behind one interface, building your own copyable type-erased wrapper, and its cost versus virtuals.
Jun 21, 2026 26 min read Advanced

How <type_traits> Works: Type Queries, enable_if, void_t Detection and if constexpr

How C++ type traits actually work under the hood: SFINAE with enable_if, the void_t detection idiom, why if constexpr discards untaken branches, and how traits relate to C++20 concepts.
Jun 21, 2026 7 min read Intermediate

C++ Brace Initialization: Narrowing Checks, Most Vexing Parse and initializer_list

What C++11 brace initialization really buys you: narrowing errors, no Most Vexing Parse, and the initializer_list rules that make vector<int>{10} one element.
Jun 20, 2026 18 min read Intermediate

C++ time_point | 'Time Points' Guide

How std::chrono::time_point ties a duration to a clock, steady_clock vs system_clock, time_point_cast, and timeouts, timestamps and elapsed-time measurement.
Jun 20, 2026 8 min read Beginner

C++ sleep_for vs sleep_until: Drift, Clock Choice and Cancellable Waits

How std::this_thread::sleep_for and sleep_until really behave: oversleeping, fixed-rate loops without drift, steady vs system clock, and waits you can cancel.
Jun 20, 2026 7 min read Intermediate

std::tuple, tie and Structured Bindings: Returning Multiple Values in C++

Using std::tuple in C++: make_tuple vs CTAD, std::get, tie and ignore, lexicographic comparison, map keys, reference traps, and when a named struct is better.
Jun 19, 2026 14 min read Beginner

C++ stack, queue and priority_queue: How the Adapters Work and the Mistakes They Invite

std::stack, std::queue and std::priority_queue explained: why pop() returns void, choosing the underlying container, min-heaps and custom comparators, Dijkstra, BFS bugs, and thread safety.
Jun 19, 2026 17 min read Beginner

set vs unordered_set in C++: Performance, Custom Comparators and Hashes, and Set Operations

set·unordered_set performance comparison, multiset, custom comparator·hash, practical set operations, iterator invalidation guide.
Jun 19, 2026 24 min read Beginner

std::string Pitfalls: SSO, c_str() Lifetime, string_view Dangling and UTF-8

Practical std::string guide: concatenation, compare, substr, find, replace, SSO, string_view lifetime, reserve for +=, and c_str validity in modern C++.
Jun 19, 2026 20 min read Beginner

std::vector in Practice: reserve vs resize, Iterator Invalidation and 2D Vectors

std::vector explained: why it beats raw arrays, reserve vs resize, iterator invalidation, algorithms, 2D vectors, and practical examples with pitfalls.
Jun 19, 2026 24 min read Intermediate

The Strategy Pattern in C++: Virtual Classes vs Function Pointers vs Lambdas vs std::function

Strategy pattern in C++: polymorphic strategies, function pointers, lambdas, std::function—sorting and compression examples; performance trade-offs.
Jun 19, 2026 22 min read Advanced

Tag Dispatching in C++: Overload Selection by Tag Types, vs if constexpr and Concepts

How tag dispatching picks a C++ overload at compile time with empty tag types, why iterator tags inherit from each other, and when if constexpr fits better.
Jun 19, 2026 16 min read Advanced

C++ Template Argument Deduction

Function template argument deduction: decay rules, references, arrays, perfect forwarding, CTAD overview, and how to fix deduction failures.
Jun 19, 2026 15 min read Intermediate

C++ Templates for Beginners: Function and Class Templates, Instantiation and Why They Live in Headers

C++ templates from scratch: function and class templates, deduction, instantiation, typename, specialization, the header rule, and the errors beginners hit.
Jun 19, 2026 11 min read Advanced

C++ Template Specialization: Full vs Partial, Why Overloads Beat Function Specializations, and ODR Traps

Full vs partial template specialization with real g++ errors: why function templates cannot be partially specialized, the Dimov/Abrahams surprise and ODR.
Jun 19, 2026 13 min read Intermediate

C++ Temporary Objects: Lifetime, const&, RVO, and Pitfalls

When C++ creates temporaries, why they die at the end of the full expression, what const& extension covers, and the c_str, string_view and lock_guard traps.
Jun 19, 2026 16 min read Beginner

C++ this Pointer: Chaining, const Methods, Lambdas, and CRTP

The implicit this pointer in non-static member functions: disambiguation, method chaining, self-assignment checks, lambda captures.
Jun 19, 2026 20 min read Intermediate

thread_local in C++: Per-Thread Caches and RNGs, Initialization Order and Pitfalls

C++11 thread_local: per-thread storage, caches, RNGs, initialization, and patterns without shared mutex overhead.
Jun 19, 2026 9 min read Intermediate

C++20 operator<=>: Defaulted Comparisons, Ordering Categories and Migration

How C++20 operator<=> synthesizes ==, <, >, strong vs weak vs partial ordering, why a custom <=> does not give you ==, and pitfalls when migrating old types.
Jun 18, 2026 14 min read Advanced

Chat Server Architecture in C++: Scaling Out with Pub/Sub, Presence, Backpressure and Reconnects [#50-1]

Scale a C++ chat server past one process: gateway tiers, pub/sub fan-out, per-room sequence numbers, TTL-based presence, backpressure and jittered reconnects.
Jun 18, 2026 35 min read Advanced

An Express-Style REST API Server in C++: Router, Middleware Chain, JWT Auth and Validation

Build Express-style REST API servers in C++: routing with path parameters, middleware chain (logging, CORS, auth), JSON request/response, JWT.
Jun 18, 2026 45 min read Advanced

C++ Game Engine Basics: ECS, Rendering, Physics, Input, Lua

Build a 2D game engine from scratch: ECS architecture, SDL rendering with z-index sorting, AABB physics with collision resolution, input system.
Jun 18, 2026 14 min read Advanced

Deploying a C++ Service to Production: glibc Floors, Debug Symbols, systemd and SIGTERM [#50-5]

Ship a C++ server that starts everywhere and stops cleanly: glibc version floors, static vs dynamic linking, split debug info, systemd units and SIGTERM.
Jun 18, 2026 42 min read Advanced

C++ Message Queues: RabbitMQ vs Kafka, Serialization and Error Handling

Complete message queue guide: Decouple services with AMQP and Kafka, producers and consumers, serialization strategies, backpressure handling.
Jun 18, 2026 16 min read Advanced

Caching in C++ Services: A Thread-Safe LRU+TTL Cache, Redis Cache-Aside and Stampede Protection [#50-8]

Caching in a C++ service: an O(1) LRU+TTL cache using splice, sharded locks, hiredis cache-aside with timeouts, single-flight loads and TTL jitter.
Jun 18, 2026 22 min read Intermediate

gRPC in C++ for Microservices: Protobuf, Streaming, Timeouts and the Errors You Will Hit

Struggling with connection timeouts, serialization costs, and error handling when using gRPC instead of C++ REST API for microservice communication?
Jun 18, 2026 22 min read Advanced

SFINAE in C++: enable_if, Expression SFINAE and When to Switch to Concepts

How SFINAE removes template overloads whose substitution fails, enable_if and decltype checks, void_t detection traits, and when C++20 concepts are better.
Jun 18, 2026 16 min read Intermediate

C++ std::span | Contiguous Memory View (C++20)

std::span for arrays and vectors: non-owning view, subspan, bounds, const correctness, lifetime pitfalls, and C API interop.
Jun 18, 2026 17 min read Intermediate

The State Pattern in C++: State Objects, Safe Transitions and std::variant

The State pattern in C++: replacing switch chains with state classes, avoiding the delete-this trap during transitions, shared states, and a std::variant FSM.
Jun 18, 2026 14 min read Beginner

C++ static Members: Static Data & Static Functions

Class static members shared by all instances: declaration vs definition, ODR, thread safety, the static init/deinit order fiasco, singletons, factories, and C++17 inline static in headers.
Jun 18, 2026 10 min read Intermediate

steady_clock vs system_clock vs high_resolution_clock: Measuring Elapsed Time and Timeouts

When to use steady_clock vs system_clock in C++, why high_resolution_clock is system_clock on GCC, and how to time code and timeouts correctly.
Jun 17, 2026 18 min read Intermediate

C++ Observability: Prometheus and Grafana for Server

Expose counters, gauges and histograms from a C++ server via prometheus-cpp or a manual /metrics endpoint, scrape with Prometheus, and chart with Grafana.
Jun 17, 2026 14 min read Advanced

C++ and Rust Interop: extern "C", cxx vs bindgen, Ownership and Panics at the FFI Boundary

Calling Rust from C++ and back: the extern "C" boundary, bindgen/cbindgen vs cxx, who frees memory, panics that abort, CString vs std::string, link order.
Jun 17, 2026 22 min read Intermediate

Open Source in C++: From Reading Code to Your First Pull

Contribute to famous C++ libraries: pick issues, fork workflow, Conventional Commits, CI, DCO, and review culture.
Jun 17, 2026 22 min read Advanced

Modernizing Legacy C++ Incrementally: Safety Nets, Ownership Migration and Macro Removal

How to modernize legacy C++ without a rewrite: characterization tests and sanitizers first, then small migrations of raw pointers, macros, enums and builds.
Jun 17, 2026 16 min read Beginner

C++ Developer Roadmap: Junior to Senior Skills and Learning

Technical and soft skills for C++ careers: from pointers and STL to architecture, mentoring, and domain specialization in games, finance, embedded.
Jun 17, 2026 28 min read Advanced

A Minimal Redis-like Server in Modern C++ [#48-1]

Build an in-memory key-value server with Boost.Asio: single-threaded io_context, async_read_until, GET/SET/DEL, and ops patterns.
Jun 17, 2026 24 min read Advanced

Build a Minimal C++ HTTP Framework from Scratch with Asio

Build a small HTTP server in C++ on Boost.Asio: request parsing, routing, middleware chains, async sessions, common failures, and when to use Boost.Beast.
Jun 17, 2026 22 min read Advanced

Custom C++ Memory Pools: Fixed Blocks, TLS, and Benchmarks

Fixed-size block pools, free lists, thread-local pools, object pools, frame allocators, and benchmarking vs global new/delete.
Jun 17, 2026 18 min read Intermediate

C++ Segmentation Fault & Core Dump: GDB/LLDB Debugging

Enable core dumps, analyze crashes with GDB or LLDB, and catch use-after-free with AddressSanitizer.
Jun 17, 2026 18 min read Intermediate

CMake Link Errors: LNK2019, undefined reference, and Fixes

Diagnosing CMake link errors like LNK2019 and undefined reference - common causes (missing target_link_libraries, ODR violations, ABI mismatches) and how to fix each one.
Jun 17, 2026 25 min read Advanced

Asio Deadlock Debugging: Async Callbacks, Locks, and Strands

Hidden deadlocks in Boost.Asio: mutex + condition_variable with async completion, lock ordering, and fixes with strands, std::lock, and thread dumps.
Jun 16, 2026 22 min read Advanced

Cache-Friendly C++: Data-Oriented Design and AoS vs SoA

Data-oriented design for C++ performance: AoS vs SoA layout, cache lines, false sharing, alignas, benchmarking with perf, and ECS patterns for games.
Jun 16, 2026 38 min read Advanced

std::pmr Memory Resources: monotonic_buffer_resource, Pools and Custom Allocators

Speeding up allocation-heavy C++ code with std::pmr (polymorphic memory resources): monotonic_buffer_resource, pool resources, custom memory_resource, allocator propagation rules for copies and nested containers, and how to benchmark it honestly.
Jun 16, 2026 18 min read Advanced

C++ SIMD and Parallelism | std::execution and Intrinsics Guide

A guide to C++ SIMD and parallelism with std::execution and intrinsics — for when a loop is slow because the compiler cannot auto-vectorize it. Covers the theory, code, and practical tips grounded in real-world problems.
Jun 16, 2026 22 min read Intermediate

C++ Package Management: vcpkg & Conan — Escaping External

C++ package management with vcpkg and Conan: dependency hell, Manifest mode, CMake, triplets, Conan profiles, common errors, and production patterns.
Jun 16, 2026 26 min read Intermediate

C++ DevContainer & Docker Guide — Standardize Builds

C++ Docker in practice: reproducible toolchains, multi-stage builds, vcpkg/Conan, Dev Containers, Compose, ccache/Ninja, and debugging with GDB.
Jun 16, 2026 22 min read Intermediate

Static Analysis in C++: Enforce Quality with Clang-Tidy &

Integrate clang-tidy (.clang-tidy, compile_commands) and Cppcheck into editors and CI. Fix use-after-move, leaks, and style drift before runtime.
Jun 16, 2026 18 min read Intermediate

C++ Runtime Checking: AddressSanitizer and ThreadSanitizer

Catch use-after-free, overflows, leaks and data races with ASan and TSan: compiler flags, reading reports, CMake presets, GitHub Actions and suppressions.
Jun 16, 2026 18 min read Advanced

C++ Fuzz Testing | Finding Crashes with Unexpected Input

A hands-on guide to C++ fuzz testing with libFuzzer and AFL, covering coverage-guided mutation, sanitizer integration, and building an effective seed corpus.
Jun 16, 2026 20 min read Intermediate

gRPC and Protocol Buffers in C++: From .proto to Production

Build C++ gRPC microservices with Protocol Buffers: .proto definition, protoc codegen, sync server and client, streaming modes, TLS, error handling.
Jun 15, 2026 40 min read Intermediate

Shallow vs Deep Copy and Move Semantics: How to Answer the C++ Interview Question

Answer the C++ copy vs move interview question: shallow vs deep copy, Rule of Three and Five, rvalue references, what std::move does, perfect forwarding.
Jun 15, 2026 42 min read Intermediate

C++ shared_ptr Circular References and weak_ptr: Trees, Observers, Graphs, Caches

Break shared_ptr reference cycles with weak_ptr: why cycles leak memory, using lock() and expired() safely, parent-child trees, observers, graphs and caches, enable_shared_from_this pitfalls, and how to diagnose leaks.
Jun 15, 2026 22 min read Intermediate

C++ Data Races: When to Use Atomics Instead of Mutexes

C++ data races explained: mutex vs std::atomic, memory orders, deadlock avoidance, and compare-exchange—with examples.
Jun 15, 2026 45 min read Advanced

C++ Lock-Free Programming: CAS, ABA, and Memory Order

Replace mutex hot spots with atomics and CAS: a lock-free stack, Michael-Scott and SPSC queues, picking a memory_order, and fixing ABA with tagged pointers.
Jun 15, 2026 25 min read Intermediate

Python Meets C++: High-Performance Engines with pybind11

Bind C++ to Python with pybind11: minimal modules, CMake/setuptools builds, NumPy buffers, GIL release, wheels, and production patterns.
Jun 15, 2026 22 min read Intermediate

Modern C++ GUI: Debug Tools & Dashboards with Dear ImGui

Dear ImGui immediate-mode GUI in C++: GLFW/OpenGL backend, widgets, PlotLines, dashboards, threading rules, and production tips.
Jun 15, 2026 35 min read Intermediate

std::filesystem Across Platforms: Paths, Directory Iteration, File Operations and Permissions

Write std::filesystem code that works on Windows and Linux: path joining and normalization, recursive iteration, copy/move/delete, permissions and errors.
Jun 15, 2026 12 min read Intermediate

C++ Clean Code Basics: Express Intent with const and noexcept

Use const correctness, noexcept, and [[nodiscard]] in C++ APIs so interfaces state what they guarantee.
Jun 15, 2026 15 min read Advanced

C++ Interface Design and PIMPL: Cut Compile Dependencies

Use the PIMPL idiom to hide implementation details, shrink rebuild graphs, and keep a stable binary layout for shared libraries and plugins.
Jun 14, 2026 25 min read Advanced

C++ SSL/TLS with OpenSSL and Asio: Handshake, Certificates and Common Errors [#30-2]

Add TLS to a C++ server with OpenSSL and Asio: the handshake, self-signed and Let's Encrypt certificates, mTLS, and fixes for hostname and chain errors.
Jun 14, 2026 17 min read Advanced

A Multi-Client Chat Server with Boost.Asio: Sessions, Write Queues and Strands [#31-1]

Build a working Boost.Asio chat server: per-session strands, a write queue that stops interleaved async_write, shared_from_this lifetime and line framing.
Jun 14, 2026 16 min read Advanced

Boost.Beast REST Server Mechanics: Parser Limits, Keep-Alive, Timeouts and CORS [#31-2]

A REST server built directly on Boost.Beast: request_parser body and header limits, keep-alive with need_eof, tcp_stream timeouts, routing, JSON and CORS.
Jun 14, 2026 16 min read Intermediate

C++ Virtual Functions and vtables: How Dynamic Binding Works

How C++ virtual functions work under the hood: vtables, vptrs, static vs dynamic binding, override and final, pure virtual, object slicing.
Jun 13, 2026 35 min read Intermediate

C++ Debugging Basics — GDB & LLDB: Breakpoints and Watchpoints

C++ debugging with GDB/LLDB: breakpoints, watchpoints, conditional breaks, backtraces, stepping, and core dumps—find segfaults faster than printf.
Jun 13, 2026 22 min read Advanced

Advanced CMake for C++: Multi-Target Projects, External

Advanced CMake: multi-target layouts, target_link_libraries, FetchContent, find_package, generator expressions, install() and Config.cmake.
Jun 13, 2026 15 min read Intermediate

GoogleTest and gMock in Practice: ASSERT vs EXPECT, Fixtures, Mocks and CTest

GoogleTest for C++ with real output: fatal vs non-fatal assertions, fixture lifecycle, parameterized and death tests, gMock expectations, FetchContent and CTest.
Jun 13, 2026 18 min read Intermediate

C++ JSON Parsing: nlohmann/json, RapidJSON, and Custom Types

Parse REST APIs and config files in C++ safely: nlohmann/json vs RapidJSON, contains/value/at, to_json/from_json, parse_error and type_error.
Jun 13, 2026 32 min read Advanced

C++20 Coroutines from Scratch: co_yield Generators, co_await and Coroutine Lifetimes

C++20 coroutines from the ground up: co_yield generators, co_await async flow, promise_type, coroutine_handle, lifetimes, pitfalls, and production.
Jun 13, 2026 22 min read Advanced

C++20 Modules: export/import, Partitions and Building with GCC, Clang, MSVC and CMake

C++20 modules: export/import, partitions, global fragments, GCC/Clang/MSVC, CMake 3.28+—parse once, reuse BMIs, faster builds than plain headers.
Jun 13, 2026 22 min read Advanced

C++ constexpr Functions and Variables: Compute at Compile

Compute values at compile time with constexpr: C++14/20 rule changes, constexpr vs const, a CRC32 lookup table, and fixes for ten common constexpr errors.
Jun 13, 2026 12 min read Intermediate

Boost in Modern C++: What the Standard Replaced, What Is Still Worth It, and How to Link It

Which Boost libraries C++17/20/23 replaced, when Asio, Beast, Container or Multiprecision still pay off, and fixing find_package, CMP0167 and link errors.
Jun 13, 2026 20 min read Intermediate

Boost.Asio Introduction: io_context and async_read

Learn Asio async I/O for C++: io_context, async_read, async_write, async_accept, steady_timer, error_code handling, shared_ptr buffers, and strand basics.
Jun 13, 2026 24 min read Intermediate

Parsing HTTP Correctly in C++: Headers, Chunked Encoding and a Boost.Beast Parser

Parse HTTP in C++ without hand-rolled bugs: case-insensitive headers, Content-Length vs chunked bodies, keep-alive, body limits and a Boost.Beast parser.
Jun 12, 2026 35 min read Beginner

CMake Tutorial for C++: CMakeLists.txt and Targets

Learn CMake for C++ projects: CMakeLists.txt, add_executable, add_library, target_link_libraries, find_package, out-of-source builds, VS Code CMake.
Jun 12, 2026 25 min read Beginner

Stack vs Heap in C++: Why Deep Recursion and Big Locals Overflow, and When to Allocate

C++ stack vs heap: stack overflow from deep recursion and huge locals, memory layout, performance, new/delete, smart pointer lead-in—Valgrind.
Jun 12, 2026 22 min read Intermediate

Tracking Down C++ Memory Leaks: Five Dangerous new/delete Patterns, Valgrind and ASan

What new and delete really do, five patterns that leak or corrupt memory, from double delete to delete vs delete[], and catching them with Valgrind and ASan.
Jun 12, 2026 24 min read Intermediate

C++ std::thread basics — join/detach mistakes and mutex

C++ std::thread: create, join, detach; mutex, condition_variable, atomic, jthread; process vs thread; common mistakes and production patterns.
Jun 12, 2026 18 min read Intermediate

Fixing Data Races with std::mutex: lock_guard, unique_lock, scoped_lock and Deadlock Avoidance

Fix C++ data races with std::mutex: choosing lock_guard, unique_lock or scoped_lock, how deadlocks form and how to avoid them, and what locking costs.
Jun 12, 2026 18 min read Intermediate

C++ Class Templates: Out-of-Line Members, Partial Specialization, Alias Templates and CTAD

C++ class templates: Stack vector<int> vs duplicate IntStack classes, partial specialization, template aliases with using, CTAD, and production.
Jun 12, 2026 13 min read Intermediate

C++ Lambda Basics | Capture· mutable

C++ lambdas: [=] [&] capture, mutable, generic lambdas, std::function recursion pitfalls, STL algorithms, and dangling reference bugs—practical guide.
Jun 12, 2026 35 min read Beginner

C++ std::vector Basics — Initialization, Operations &

C++ std::vector fundamentals: init, access, insert/erase, size vs capacity, reserve vs resize, iterator safety, and production patterns.
Jun 12, 2026 12 min read Beginner

C++ STL Algorithms Basics | sort· find

Replace hand-written loops with std::sort, find, find_if, count_if, transform, accumulate—iterator ranges, erase-remove, lower_bound on sorted data.
Jun 12, 2026 28 min read Intermediate

Profiling C++ Before Optimizing: perf, gprof, Flame Graphs and Finding the Real Bottleneck

Measure before you optimize: C++ profiling with Linux perf, gprof, flame graphs, std::chrono, and Valgrind.
Jun 11, 2026 10 min read Intermediate

Lvalues, Rvalues, xvalues: C++ Value Categories and How They Drive Move Semantics

Learn C++ lvalues and rvalues: value categories, references, move semantics, and std::move—with examples for overload resolution and fewer unnecessary.
Jun 11, 2026 20 min read Intermediate

RVO vs NRVO: When C++ Compilers Elide Copies, and When std::move Makes It Worse

RVO vs NRVO: when the compiler elides copies on return, C++17 guaranteed elision for prvalues, NRVO heuristics, and interaction with move semantics.
Jun 11, 2026 25 min read Intermediate

C++ Sanitizers: ASan, TSan, UBSan, and MSan Explained

How C++ sanitizers work and what each one misses: ASan shadow memory, TSan happens-before tracking, UBSan recovery mode, MSan instrumentation rules, and CI setups that actually fail the build.
Jun 11, 2026 35 min read Beginner

What Is C++? History, Standards , Use Cases, and How to

C++ overview for beginners: evolution from C, C++11/17/20/23, game/systems/finance use cases, pros and cons, myths, learning roadmap, and production.
Jun 11, 2026 35 min read Beginner

C++ Development Environment Setup: From Compiler Install to

Start C++ on Windows, macOS, or Linux: install Visual Studio (MSVC), MinGW (GCC), or Xcode (Clang), then write, compile, and run Hello World with clear.
Jun 11, 2026 25 min read Beginner

VS Code C++ Setup: IntelliSense, Build Tasks, and Debugging

Configure Visual Studio Code for C++: c_cpp_properties.json for IntelliSense, tasks.json for builds, launch.json for gdb/lldb debugging, plus CMake.
Jun 10, 2026 13 min read Intermediate

C++ random | Engines, distributions, and replacing rand()

C++11 random: random_device seeding, mt19937, uniform and normal distributions, shuffle, weighted picks, threading, and when to use a cryptographic RNG.
Jun 10, 2026 20 min read Intermediate

C++ std::random_device | Hardware entropy for seeding

How random_device maps to OS entropy, using entropy(), seed_seq for mt19937, UUID and token examples, performance vs mt19937.
Jun 10, 2026 16 min read Beginner

C++ Random Numbers in Practice: Seeding, Reproducibility, and Common Pitfalls

Practical C++ <random> pitfalls: why rand() % n is biased, why one 32-bit seed is not enough for mt19937, why the same seed gives different numbers on different compilers, and when you need a CSPRNG instead.
Jun 10, 2026 14 min read Advanced

C++20 Range Adaptors: Composing Reusable Pipelines Without Fighting the Types

C++20 range adaptors as objects: calling vs piping, storing and composing adaptor closures, why a function cannot return two different pipelines, lifetime rules for returned views, and writing your own adaptor.
Jun 10, 2026 13 min read Advanced

C++ Reference Collapsing: How T& && Becomes T&, and Why Forwarding References Depend on It

Reference collapsing in C++: the four rules, where they apply (templates, auto&&, typedefs, decltype), how std::forward uses them, and the bugs they cause.
Jun 10, 2026 16 min read Intermediate

C++ sregex_iterator | Regex iterators for all matches

Use sregex_iterator and sregex_token_iterator to enumerate matches, split tokens, avoid dangling iterators, and handle empty matches and UTF-8 limits.
Jun 10, 2026 12 min read Beginner

C++ return Statements: Copy Elision, Dangling Returns and Signaling Failure

How C++ return behaves: guaranteed elision vs NRVO, when return copies instead of moves, -Wreturn-local-addr, -Wreturn-type, and std::optional results.
Jun 9, 2026 14 min read Intermediate

C++ packaged_task | 'Package Task' Guide

std::packaged_task is a C++11 feature that wraps a function or callable object and allows you to receive the result as a std::future.
Jun 9, 2026 15 min read Advanced

C++17 Parallel Algorithms: Execution Policies, Toolchain Support, and Why Exceptions Call terminate

Using std::execution::par and par_unseq with sort, transform and reduce: what each policy permits, TBB and compiler support, data races, std::terminate on exceptions, and when it pays off.
Jun 9, 2026 16 min read Intermediate

C++ std::filesystem::path | Cross-platform paths in C++17

A deep look at std::filesystem::path internals: encoding, normalization, and equality pitfalls on Windows and POSIX.
Jun 9, 2026 14 min read Advanced

C++ std::forward and Perfect Forwarding: How It Works and Where It Breaks

How std::forward preserves value category, why std::move in a template steals caller data, forwarding twice, and the arguments that cannot be forwarded.
Jun 9, 2026 22 min read Advanced

The Pimpl Idiom: Out-of-Line Destructors, unique_ptr<Impl> and the Build-Time vs Runtime Trade-off

Why the Pimpl destructor must be defined out-of-line, why unique_ptr<Impl> forces the full Rule of Five, and how Pimpl trades compile-time decoupling for indirect-call overhead — with a working fix for the classic Fast-Pimpl placement-new mistake.
Jun 9, 2026 16 min read Beginner

C++ Pointers Explained: Understand “Hard” Pointers in 5

C++ pointers explained with a street-address analogy: basics, swap, arrays, pitfalls, references, new/delete, smart pointers, const pointers.
Jun 9, 2026 13 min read Intermediate

C++ Preprocessor Directives: #include, #define, and #ifdef

How the C++ preprocessor handles #include, #define, #if/#ifdef and #pragma, why macros misbehave (double evaluation, dangling else), and when to use constexpr.
Jun 8, 2026 13 min read Beginner

C++ numeric_limits | 'Type Limits' Guide

std::numeric_limits is a template class that queries the limit values and properties of types provided by the C++ standard library.
Jun 8, 2026 10 min read Intermediate

C++ Object Slicing: Why Derived State Disappears and How to Prevent It

Why copying a derived object into a base value drops its state and overrides, where slicing hides (catch clauses, vectors, throw e;), and how to block it.
Jun 8, 2026 18 min read Intermediate

The Observer Pattern in C++: weak_ptr Subscribers, Typed Events and Signal/Slot Designs

Observer pattern in C++: decouple publishers and subscribers, weak_ptr, typed events, signal/slot style—patterns, pitfalls, and production examples.
Jun 8, 2026 20 min read Intermediate

C++ One Definition Rule : Multiple Definitions and inline

The ODR requires a single definition across the program for variables and functions, with exceptions for inline, templates, and C++17 inline variables.
Jun 8, 2026 22 min read Intermediate

std::optional in Practice: value_or, C++23 and_then/transform, and When Not to Use It

std::optional vs nullptr and exceptions: value_or, and_then, transform, or_else, performance, and production error-handling patterns (C++17–C++23).
Jun 8, 2026 14 min read Intermediate

C++ override & final: Virtual Overrides and Devirtualization

C++ override and final: catching signature mistakes, sealing classes and virtual functions, devirtualization and performance notes, and practical.
Jun 7, 2026 19 min read Beginner

C++ Loops: Choosing Between for, while, do-while and Range-for

How to choose between for, while, do-while, and range-based for in C++ — cache-friendly iteration, iterator invalidation, and copy-vs-reference pitfalls.
Jun 7, 2026 22 min read Beginner

C++ Makefile Tutorial | Variables· Pattern Rules

Makefile guide for C++ projects: tabs, automatic variables, wildcards, -MMD dependencies, parallel -j, and when to prefer CMake for cross-platform builds.
Jun 7, 2026 11 min read Intermediate

What new and delete Actually Do in C++: operator new, delete[] Mismatch, Alignment, Placement new and Arenas

How a C++ new expression splits into operator new plus a constructor, why delete vs delete[] corrupts the heap, aligned and placement new, and pmr arenas.
Jun 7, 2026 15 min read Intermediate

C++ Move Constructor: rvalue Stealing & noexcept Best

C++ move constructors: rvalue resource transfer, copy vs move, vector and noexcept, self-move, and when not to std::move return locals.
Jun 7, 2026 20 min read Advanced

C++ Move Semantics: Copy vs Move Explained

C++11 move semantics: rvalue references, std::move, Rule of Five, noexcept move constructors—copy vs move performance and safe usage patterns.
Jun 7, 2026 16 min read Beginner

C++ Namespaces: using-Declarations vs Directives, Anonymous Namespaces and ADL

C++ namespaces explained: avoiding name collisions, using-declarations vs using-directives, nested namespaces, anonymous namespaces, aliases, ADL.
Jun 7, 2026 16 min read Intermediate

C++ noexcept Specifier: Contracts, Moves, and std::terminate

How noexcept actually changes program behavior: why a violated noexcept promise skips exception handling entirely and calls std::terminate, and why vector silently falls back to copying without a noexcept move constructor.
Jun 6, 2026 19 min read

C++ Junior Developer Interview

A guide to preparing for junior C++ developer interviews, covering common questions on memory, OOP, and STL basics.
Jun 6, 2026 17 min read Intermediate

C++ Iterators: Categories, Operations, iterator_traits and Invalidation Bugs

C++ iterators explained: the five categories, iterator operations, iterator_traits, custom filter and transform iterators, and bugs like dereferencing end().
Jun 6, 2026 22 min read Intermediate

C++20 std::jthread: Auto-Join, Cooperative Cancellation with stop_token, and Its Limits

C++20 std::jthread explained: why std::thread terminates without join, how jthread requests stop and joins in its destructor, how stop_token, stop_callback, and condition_variable_any make waits cancellable, and the cases where auto-join still hangs.
Jun 6, 2026 16 min read Intermediate

C++ Object Lifetime: Storage Duration, RAII, and Dangling

C++ lifetime and storage duration: automatic, static, dynamic, thread_local; destruction order; temporaries; smart pointers and RAII.
Jun 6, 2026 13 min read Intermediate

C++ Linkage and Storage Duration: extern and static

External, internal and no linkage plus automatic, static, thread-local and dynamic storage in C++: extern, anonymous namespaces, static locals, init order.
Jun 6, 2026 12 min read Intermediate

How the C++ Linker Works: Undefined References, Library Order, and Shared Libraries

What the C++ linker actually does, why "undefined reference" and "multiple definition" happen, why -l order matters, and how rpath, $ORIGIN and LTO behave.
Jun 6, 2026 13 min read Intermediate

std::locale in C++: Number, Money and Date Formatting, imbue vs Global, and UTF-8 Caveats

How std::locale changes stream output and parsing, custom numpunct facets that need no OS locale, imbue vs locale::global, and why wire formats need classic.
Jun 5, 2026 12 min read Beginner

C++ Header Guards: #ifndef vs #pragma once and Portability

How #ifndef guards and #pragma once stop double inclusion, why they cannot prevent multiple definition link errors, macro collisions and circular includes.
Jun 5, 2026 16 min read Intermediate

C++ Heap Corruption: Double Free and Wrong delete

Why heap corruption crashes far from the bug that caused it: overruns, double delete, delete vs delete[], and use-after-free, plus how ASan, Valgrind, and page heap catch them at the source.
Jun 5, 2026 22 min read Advanced

C++ `if constexpr` | Compile-Time Branching in Templates

Use `if constexpr` to discard untaken branches during instantiation—unlike runtime `if`, avoiding ill-formed code in unused branches for templates.
Jun 5, 2026 12 min read Beginner

C++ if and switch Pitfalls: Fallthrough, Crossed Initialization, if (x = 5) and the Warnings That Catch Them

How if/else and switch behave in C++, with real g++ diagnostics for fallthrough, jumps over initialization, if (x = 5), dangling else and unhandled enums.
Jun 5, 2026 20 min read Beginner

C++ Include Paths: #include '...' vs <...>, -I, and CMake

How the compiler searches for headers: angle vs quotes, -I order, CMake target_include_directories, and fixing “No such file or directory” errors.
Jun 5, 2026 14 min read Intermediate

C++ Inheritance Design: Access Specifiers, Virtual Destructors, Hiding and Diamonds

C++ class hierarchy design: public vs private inheritance, virtual destructors, virtual calls in constructors, name hiding, slicing and virtual bases.
Jun 5, 2026 14 min read Advanced

C++ Initialization Order: Static Phases, Cross-TU Globals, Bases and Members

When C++ objects get initialized: zero, constant and dynamic phases, why cross-file global order is unspecified, member vs initializer-list order, and fixes.
Jun 5, 2026 15 min read Intermediate

C++ initializer_list Constructors: Why Braces Pick Them, and How That Breaks Overloads

How std::initializer_list constructors take priority in brace initialization, why vector{3, 7} has two elements, {{}} vs ({}), move-only elements, dangling lists, and API design rules.
Jun 5, 2026 15 min read Intermediate

C++ inline Functions: ODR, Headers, and Compiler Inlining

C++ inline keyword: linkage and ODR for header definitions, not a guarantee of inlining, class members, inline variables (C++17), and virtual functions.
Jun 5, 2026 12 min read Advanced

C++ inline Namespace: Versioning, API Evolution, and ADL

How C++11 inline namespaces lift names into the parent, why the version stays in mangled symbols, and how lookup, specialization and ADL treat them.
Jun 5, 2026 26 min read Intermediate

Preparing for C++ Coding Interviews: 7 Problem Types, Must-Know STL and a Day-Of Checklist

Preparing for C++ coding tests and interviews: seven common problem types, the STL you need, time complexity budgets, fast I/O, and the mistakes behind TLE, WA and MLE.
Jun 4, 2026 15 min read Beginner

C++ file I/O | ifstream, ofstream, and binary reads/writes

C++ fstream in depth: why streams fail silently, buffering vs durability, CRLF corruption on Windows, RAII close pitfalls, and endl performance traps.
Jun 4, 2026 14 min read Intermediate

C++ Forward Declaration: Reduce Includes and Break Cycles

When a forward declaration beats #include: pointer members, breaking circular includes, PIMPL, and the unique_ptr incomplete-type error in destructors.
Jun 4, 2026 14 min read Beginner

C++ friend Keyword: Access Control and Operators

How friend functions and classes reach private members, why operator<< is usually a friend, friend factories, and when a getter or member is the better choice.
Jun 4, 2026 20 min read Beginner

C++ Functions: Parameters, Return Values, and Overloading

Complete C++ function guide for beginners: declaration vs definition, pass by value/reference/pointer, return rules, RVO, default arguments.
Jun 4, 2026 13 min read Intermediate

C++ function objects | Functors· operator

What functors are, stateful vs function pointers, STL algorithms with predicates, comparison functors, and std::function overhead vs templates.
Jun 4, 2026 15 min read Beginner

C++ Function Overloading: Rules, Ambiguity, and Name

Why return type never disambiguates overloads, why float(10.0f) is not actually ambiguous between int and double, and how default arguments and const-qualified members interact with overload resolution.
Jun 4, 2026 28 min read Beginner

C++ Header Files : Declarations, Include Guards, and What

How C++ headers declare APIs while .cpp files define behavior: ODR-safe patterns, include guards, forward declarations, templates, inline functions.
Jun 3, 2026 16 min read Intermediate

C++ Multithreading Crashes: Data Races, mutex, and atomic

Fix intermittent multithreaded crashes: data races vs race conditions, std::mutex, atomics, false sharing basics, condition variables.
Jun 3, 2026 13 min read Beginner

CMake Errors: 10 Common CMake Error Messages and How to Fix

Fix CMake Error messages: target not found, version mismatch, find_package failures, syntax errors, and out-of-source builds.
Jun 3, 2026 22 min read Intermediate

C++ Exceptions Done Right: Catch by Reference, Safety Guarantees, RAII and noexcept

Handle C++ exceptions safely: catch by const reference, basic/strong/nothrow guarantees, RAII cleanup, noexcept on moves, and when to use std::expected.
Jun 3, 2026 16 min read Advanced

C++ Exception Performance: Zero-Cost, noexcept, and Error

C++ exception model: zero-cost on success path, cost of throw and unwind, noexcept and vector moves, frequent errors vs exceptions, and -fno-exceptions.
Jun 3, 2026 22 min read Intermediate

C++ Exception Specifications: noexcept, History, and throw

C++ exception specifications from throw() to noexcept: move operations, swap, destructors, conditional noexcept, and why dynamic specs were removed.
Jun 2, 2026 18 min read Intermediate

C++ Iterator Invalidation: “vector iterators incompatible”

Iterator invalidation rules for vector, deque, list, map and unordered_map, ten bugs behind 'vector iterators incompatible', and fixes using erase's return.
Jun 2, 2026 20 min read Intermediate

How to Read C++ Template Error Messages: GCC, Clang Guide

Decode C++ template errors effectively. Learn to read compiler messages, understand SFINAE notes, and use C++20 concepts to shorten error output.
Jun 2, 2026 17 min read Intermediate

Finding C++ Memory Leaks: Valgrind and AddressSanitizer

Find C++ heap leaks with Valgrind, ASan/LeakSanitizer and the Visual Studio CRT debug heap, then fix early returns, exception paths and shared_ptr cycles.
Jun 2, 2026 20 min read Beginner

15 Common C++ Beginner Mistakes: From Compile Errors to

Fix missing semicolons after classes, forgotten headers, void main, pointer bugs, off-by-one loops, = vs ==, and how to read compiler errors.
Jun 2, 2026 19 min read Intermediate

Why Is My C++ Program Slow? Find Bottlenecks with Profiling

The algorithm is right but C++ code is still slow: find hotspots with perf, flame graphs and Visual Studio, then fix copies, allocations and cache misses.
Jun 2, 2026 18 min read Intermediate

C++ Undefined Behavior : Why Release-Only Crashes Happen

How C++ undefined behavior like out-of-bounds access, signed overflow, uninitialized reads and data races makes release builds crash, and how UBSan finds it.
Jun 2, 2026 13 min read Beginner

C++ Include Errors: Fixing “No such file or directory”

Resolve #include failures: typos, -I paths, case sensitivity, circular dependencies, forward declarations, and #pragma once vs include guards.
Jun 1, 2026 15 min read Advanced

C++ Diamond Problem: Multiple Inheritance & Virtual Bases

C++ diamond inheritance explained: why the common base is duplicated, what virtual inheritance really changes (construction, casts, layout, overriders), and when composition or interfaces are the better fix.
Jun 1, 2026 20 min read Intermediate

Walking Directories with std::filesystem: directory_iterator, Recursion, Symlinks and error_code

directory_iterator vs recursive_directory_iterator, directory_options, symlinks, error_code overloads, filtering, disk usage, and performance tips.
Jun 1, 2026 14 min read Intermediate

C++ Random Distributions: Choosing and Using uniform, normal, Poisson, and discrete

C++11 random distributions explained by what they model: uniform, normal, Bernoulli, binomial, Poisson, exponential, and discrete, plus range rules, reset(), per-call parameters, and the modeling mistakes that skew simulations.
Jun 1, 2026 16 min read Intermediate

LNK2019 Unresolved External Symbol in C++: Five Causes

Fix MSVC LNK2019 and “unresolved external symbol”: missing definitions, .cpp not in the build, missing .lib links, name mismatches, and templates.
Jun 1, 2026 18 min read Intermediate

C++ Segmentation Fault: Five Causes and Debugging with GDB

Common C++ segfault causes (null dereference, use-after-free, buffer overrun, stack overflow, uninitialized pointers) and how to find them with GDB and ASan.
May 31, 2026 20 min read Intermediate

C++ Copy & Move Constructors: Rule of Five and RAII

Rule of Five in C++: copy/move constructors and assignment, deep copy vs shallow, self-assignment, noexcept moves, copy elision, and FileHandle patterns.
May 31, 2026 18 min read Advanced

C++ Coroutines | Asynchronous Programming in C++20

C++20 coroutines: coroutine_handle, promise_type, co_await, generators, Task patterns, and compiler support for async-style control flow.
May 31, 2026 22 min read Advanced

CRTP vs Virtual Functions: Static Polymorphism Without vtable Overhead

How CRTP gives C++ static polymorphism without a vtable, how it compares with virtual functions, the usual CRTP mistakes, and C++23 deducing this.
May 31, 2026 15 min read Intermediate

C++ Dangling References: Lifetime and Temporaries

Dangling references in C++: returning references to locals, temporaries, container invalidation, lambdas, and fixes—values, smart pointers, ASan.
May 31, 2026 15 min read Intermediate

C++ date parsing and formatting | chrono· std::format

Parse and format dates in C++20 chrono and std::format, plus the IANA tzdata, DST ambiguity, and locale pitfalls that break naive implementations.
May 31, 2026 28 min read Intermediate

C++ Debugging: GDB, LLDB, Sanitizers, and Leaks

Production-grade C++ debugging: GDB/LLDB advanced usage, ASan/TSan/UBSan/MSan, Valgrind, core dumps, data races, deadlocks, and logging patterns.
May 31, 2026 11 min read Intermediate

C++ decltype: Why decltype((x)) Is a Reference and decltype(auto) Can Dangle

How decltype computes types: names vs expressions, value categories, trailing return types, dangling decltype(auto) returns with the real GCC warning.
May 31, 2026 13 min read Intermediate

C++ =default and =delete: Triviality, Deleted Overloads, and the Implicit Move Trap

Why =default on first declaration keeps a type trivial, how =delete blocks conversions, and why declaring a destructor silently turns your moves into copies.
May 30, 2026 26 min read Intermediate

C++ std::variant vs union: Type Safety, Overhead and When to Use Each

std::variant vs union: how variant tracks the active type and dispatches with std::visit, what a raw union leaves to you, and migrating legacy unions.
May 30, 2026 13 min read Intermediate

std::any vs void* in C++: Checked Casts, Heap Costs and C Callback Context

std::any vs void* in C++17: bad_any_cast vs nullptr casts, exact type matching, small buffer limits, copyable-only storage, and safe void* C callback context.
May 30, 2026 32 min read Advanced

Moving Work to Compile Time in C++: constexpr, consteval, if constexpr and TMP

Move work into the C++ compiler with constexpr functions and classes, consteval for mandatory compile-time calls, if constexpr, and template metaprogramming.
May 30, 2026 18 min read Advanced

C++20 Constraints in Practice: requires Expressions, Subsumption, and Overload Selection

How C++20 constraints actually behave: what a requires expression checks (syntax, not meaning), why only named concepts subsume each other, how constrained overloads are ranked, and the mistakes that make a concept accept the wrong types.
May 30, 2026 17 min read Intermediate

C++ constexpr Functions | Compile-Time Functions Explained

C++ constexpr functions: compile-time and runtime use, C++11 vs C++14 vs C++17, arrays, classes, and optimization. Practical examples and pitfalls.
May 29, 2026 22 min read Advanced

C++ Memory Leak Debugging Case Study

A real production C++ server memory leak: tracing and fixing it with Valgrind, ASan, and Heaptrack—from symptoms and root cause to fixes and prevention.
May 29, 2026 25 min read Advanced

C++ Performance Optimization Case Study

How one C++ REST endpoint went from about 203 ms to 20 ms p50 in its benchmark: perf profiling, a hash index, fewer string copies and parallel JSON output.
May 29, 2026 16 min read Advanced

C++ Intermittent Segfault Case Study: Core Dumps, gdb, and rr

Tracing an intermittent C++ server segfault to a data race: core dump setup, reading the gdb backtrace, rr replay with reverse watchpoints, and TSan checks.
May 29, 2026 16 min read Beginner

C++ Classes and Objects: Constructors and Access Control

Learn C++ OOP from scratch: classes, constructors, public/private access, destructors, const member functions, and the Rule of Three/Five with working.
May 29, 2026 14 min read Intermediate

C++ CTAD and Deduction Guides: Class Template Argument Deduction (C++17)

How C++17 CTAD deduces class template arguments from constructors, when you need a user-defined deduction guide (iterator pairs, const char* to std::string), explicit guides, and the surprises with braces, copies and string literals.
May 29, 2026 15 min read Intermediate

C++ map vs unordered_map: Complexity, Pitfalls, and When to Use Each

map vs unordered_map: sorted red-black tree vs hash table. Complexity, range queries, the operator[] insertion pitfall, erasing while iterating, iterator invalidation, and custom key hashing.
May 29, 2026 14 min read Intermediate

C++ shared_ptr vs unique_ptr: Ownership, Overhead, Thread Safety and When to Use Each

shared_ptr vs unique_ptr: prefer unique_ptr by default; use shared_ptr for shared ownership. Raw pointers in C++ do not communicate ownership.
May 29, 2026 10 min read Beginner

C++ Array vs vector: Performance, Safety, and When to Use

C arrays, std::array, and std::vector compared: where the memory lives, pointer decay, bounds checks, copy semantics, and where the real performance cost is.
May 29, 2026 16 min read Intermediate

C++ string vs string_view: Fast, Non-Owning String Handling

std::string vs std::string_view: avoid copies in read-only APIs, allocation costs, lifetime rules, substring performance, and null-termination caveats.
May 29, 2026 9 min read Beginner

C++ vector reserve vs resize: When to Use Which

vector::reserve changes capacity only while resize changes size and constructs elements. Covers the v[i]-after-reserve bug, growth rules, and reserve-in-a-loop.
May 29, 2026 8 min read Intermediate

std::optional vs Nullable Pointer vs Out-Parameter in C++: Choosing How to Return 'Maybe a Value'

std::optional vs T* vs out-param in C++: who owns the result, optional<T&> before C++26, value() vs operator*, optional<bool> traps, dangling lookups.
May 29, 2026 18 min read Intermediate

C++ emplace vs push: Performance and Move Semantics

When emplace_back really beats push_back: in-place construction, how move semantics narrow the gap, and traps with explicit constructors and exceptions.
May 29, 2026 9 min read Intermediate

std::function vs Function Pointers vs Template Callables in C++: Type Erasure Cost, SBO and C Interop

std::function vs function pointer vs template in C++: why capturing lambdas cannot convert, when std::function allocates, move-only captures, C void* data.
May 28, 2026 16 min read Advanced

C++ any | 'Type Erasing' Guide

A guide that summarizes std::any and variant·void* comparison, type safety, any_cast, practical examples, and performance overhead.
May 28, 2026 17 min read Advanced

C++ std::atomic: Atomic Operations, Memory Order, and compare_exchange

How std::atomic prevents data races in C++: load/store/fetch_add, compare_exchange_weak vs strong, the memory orders relaxed, acquire/release and seq_cst, and when a mutex is still the better tool.
May 28, 2026 13 min read Intermediate

C++ std::bind | Placeholders and partial application

std::bind is a function introduced in C++11 that creates a new function object by pre-binding a function and its arguments.
May 28, 2026 18 min read Intermediate

C++ bitset | 'Bit Set' Guide

This is a bitset guide that summarizes the basics of bit operations, bitset vs vector<bool>, masking, permutation, and combination patterns.
May 28, 2026 13 min read Intermediate

C++ Buffer Overflows: Causes, Safe APIs, and Security Impact

Buffer overflows in C and C++: strcpy, memcpy, stack and heap corruption, ASan, strncpy vs string, bounds checks, and secure coding patterns.
May 28, 2026 15 min read Advanced

C++ Cache Optimization: Locality, False Sharing, SoA vs AoS

Improve CPU cache efficiency in C++: spatial locality, matrix layout, struct packing, prefetching, blocking, false sharing, and alignment for SIMD.
May 27, 2026 11 min read Intermediate

Why std::remove Doesn't Shrink Your Vector: Erase-Remove, std::erase_if and the Moved-From Tail

How std::remove and remove_if really work, why size stays the same, what is left in the tail, and when to use C++20 std::erase_if, list::remove or unique.
May 27, 2026 10 min read Beginner

std::replace, replace_if and replace_copy in C++: The v[0] Aliasing Bug, Type Deduction Errors and Substring Replacement

How std::replace, replace_if and replace_copy work, why passing v[0] as the old value stops replacing, the int/double deduction error, and substring replace.
May 27, 2026 27 min read Intermediate

C++ Search Algorithms: find, binary_search, lower_bound, and upper_bound

Choose between linear find and binary search on sorted ranges; use lower_bound, upper_bound, and equal_range for positions and equal-key runs in C++.
May 27, 2026 13 min read Intermediate

C++ Algorithm Sort: std::sort, stable_sort, partial_sort &

Compare C++ std::sort, stable_sort, partial_sort, and nth_element: custom comparators, partial sorts, median selection, and practical STL sorting patterns.
May 27, 2026 16 min read Advanced

C++ Allocator | Custom allocators for STL containers

Default std::allocator, passing allocators to containers, custom pool and tracking allocators, PMR monotonic_buffer_resource.
May 26, 2026 20 min read Intermediate

CMake vs Make vs Ninja vs Meson: What Each Build Tool Actually Does and How to Choose

What Make, CMake, Ninja and Meson each do, how a build tool differs from a build file generator, example build files, and which combination fits a C++ project.
Apr 27, 2026 19 min read Beginner

C++ Copy Algorithms: std::copy, copy_if, copy_n

Copy and move ranges safely in C++ with std::copy, copy_if, copy_n, copy_backward, and remove_copy. Hand-written copy loops work, but the algorithm versions make intent explicit and avoid off-by-one and overlap bugs.
Apr 27, 2026 22 min read Beginner

C++ Algorithm Count: std::count, count_if, all_of, any_of &

Count matching values and predicates with std::count and count_if; learn all_of, any_of, none_of, empty ranges, and short-circuit behavior in C++.
Apr 27, 2026 17 min read Beginner

C++ Generate Algorithms: std::fill and std::generate

Fill C++ containers with std::fill, std::generate, and std::iota, including fill_n/generate_n with back_inserter, indirect sorting with iota, proper C++11 random number generation, and common capture-by-value pitfalls.
Apr 27, 2026 16 min read Intermediate

C++ Algorithm | 'STL algorithm' Core Summary

C++ STL algorithm core summary. Frequently used functions like sort, search, transform, and tips to prevent mistakes and make selections.
Apr 27, 2026 23 min read Intermediate

C++ Heap Algorithms: make_heap, push_heap, pop_heap

How make_heap, push_heap, pop_heap and sort_heap keep a heap inside a vector, when priority_queue is simpler, and how comparators build a min-heap.
Apr 27, 2026 13 min read Beginner

C++ MinMax Algorithms: std::min, max, minmax_element & clamp

Use std::min, max, minmax, min_element, max_element, minmax_element, and C++17 std::clamp — two-value vs range APIs, iterators, and performance notes.
Apr 27, 2026 14 min read Intermediate

C++ <numeric>: accumulate vs reduce, transform_reduce, Scans and the Init-Type Trap

How std::accumulate, reduce, transform_reduce, partial_sum and the scans differ: evaluation order, associativity, init value type, overflow, parallel policies.
Apr 27, 2026 12 min read Intermediate

C++ Algorithm Partition | 'Partition Algorithm' Guide

std::partition, stable_partition, partition_point and partition_copy in C++: splitting ranges by a predicate, keeping order, finding the boundary, 3-way splits.
Apr 27, 2026 9 min read Intermediate

C++ next_permutation and prev_permutation: All Permutations, Duplicates and Combinations

How std::next_permutation works, why you sort first, how duplicates are handled, correct k-permutation and nCk loops, ranges versions and the k-th permutation.
Apr 27, 2026 18 min read Intermediate

10 Classic Coding Test Problems Solved in C++: From Two Sum to Dijkstra

Ten classic coding test problems in C++ with STL solutions and time complexity, from Two Sum and binary search to coin change, LIS, knapsack and Dijkstra.
Apr 26, 2026 16 min read Advanced

C++ ADL (Argument-Dependent Lookup): Namespaces & Operators

Argument-dependent lookup in C++: finding functions in associated namespaces, swap idiom, operator overloads, pitfalls, and disabling ADL.
Apr 26, 2026 17 min read Intermediate

The Flyweight Pattern in C++: Sharing Intrinsic State to Cut Memory in Text and Tile Maps

Flyweight in C++: split shared intrinsic state from per-object extrinsic state, with glyph, font and tile-map examples and the mutation and cache-growth traps.
Apr 26, 2026 12 min read Intermediate

C++ Fold Expressions | 'Parameter Pack Folding' Guide

How C++17 fold expressions collapse a parameter pack into a single expression, with unary and binary forms and where they replace recursive templates.
Apr 26, 2026 20 min read Intermediate

C++ future and promise | 'Asynchronous' Guide

How std::future and std::promise pass a result between threads in C++, and the difference between this and using std::async directly.
Apr 25, 2026 15 min read Intermediate

C++ Copy Initialization | 'Copy Initialization' Guide

Why T x = value can fail where T x(value) compiles: copy vs direct initialization, explicit constructors, conversion operators, and auto and brace gotchas.
Apr 25, 2026 17 min read Intermediate

The Decorator Pattern in C++: Adding Behavior by Composition (Streams, Logging, Formatters)

The Decorator pattern in C++: adding behavior at runtime through composition instead of inheritance, with stream decorators, a logging system, and a text formatter example.
Apr 25, 2026 26 min read Beginner

C++ Default Initialization: When Variables Stay Indeterminate and How That Bites

Default initialization happens with no initializer, and local scalars are left indeterminate. Covers the danger zone, real-world bugs, class members, arrays, dynamic allocation, and detection tools.
Apr 25, 2026 9 min read Beginner

C++20 Designated Initializers: Named Struct Fields, Order Rules and Nested Configs

C++20 designated initializers: declaration-order rules, what C allows that C++ rejects, real GCC errors, defaults, nested structs and config-struct patterns.
Apr 25, 2026 16 min read Intermediate

C++ std::chrono::duration: Units, Literals, and Safe Conversions

Working with std::chrono::duration in C++ - representing time intervals, chrono literals like 500ms and 2h, converting between units safely, C++20 calendar literals, and avoiding truncation bugs.
Apr 25, 2026 15 min read Intermediate

C++ explicit Keyword | 'explicit Keyword' Guide

How explicit blocks implicit conversions via one-argument constructors and conversion operators, why explicit operator bool works in if, and C++20 explicit(bool).
Apr 25, 2026 23 min read Advanced

Expression Templates in C++: Lazy Evaluation That Removes Temporaries in Vector and Matrix Math

Expression templates in C++: building lazily evaluated expression trees to eliminate temporaries in vector and matrix operations, with a small math library and benchmarks.
Apr 25, 2026 19 min read Intermediate

The Facade Pattern in C++: One Simple Interface over a Messy Subsystem, and What It Hides

C++ Facade pattern: wrap a complex subsystem behind one simple interface, with multimedia, build-pipeline, and database examples, plus the tradeoffs of hiding subsystems behind one API.
Apr 25, 2026 21 min read Intermediate

Factories in C++: Simple Factory vs Factory Method vs Abstract Factory, and Self-Registering Plugins

Simple Factory, Factory Method and Abstract Factory in C++ with unique_ptr, plus self-registering plugin factories and why static libraries silently drop them.
Apr 24, 2026 11 min read Intermediate

std::async and Launch Policies: When async Actually Runs on Another Thread

What std::launch::async and deferred really do, why the default policy breaks wait_for loops, why the returned future blocks in its destructor, and exceptions.
Apr 24, 2026 10 min read Beginner

How C++ auto Deduces Types: References, const, Braced Init and decltype(auto)

How C++ auto deduces types: why it drops const and references, auto& vs auto&&, braced-init rules, vector<bool> proxies, decltype(auto) and real errors.
Apr 24, 2026 13 min read Intermediate

C++ Benchmarking: steady_clock, Warmup, Statistics and Google Benchmark

Benchmark C++ code without fooling yourself: steady_clock, dead-code elimination, setup outside the timer, median and p95 over mean, and Google Benchmark usage.
Apr 24, 2026 23 min read Intermediate

The Bridge Pattern in C++: Splitting Abstraction from Implementation to Avoid Class Explosion

C++ Bridge pattern guide covering how separating abstraction from implementation prevents class explosion, with renderer switching, cross-platform file system, and common pitfalls.
Apr 24, 2026 25 min read Intermediate

CMake for C++ Projects: Targets, Presets, find_package and C++20 Modules

Full CMake tutorial for C++: cross-platform builds, CMake 3.28+ features, CMakePresets, C++20 modules, find_package, targets, and CI/CD.
Apr 24, 2026 14 min read Intermediate

CMake find_package: CONFIG vs MODULE, Search Paths and Errors

How CMake find_package really searches: MODULE-then-CONFIG order, CMAKE_PREFIX_PATH and <Pkg>_ROOT, imported targets, FindBoost removal, and fixes for each error.
Apr 24, 2026 16 min read Intermediate

CMake Targets in C++ | PUBLIC/PRIVATE

Modern CMake targets: add_executable/add_library, target_* commands, visibility, transitive deps, OBJECT libs, aliases—multi-library project.
Apr 24, 2026 16 min read Intermediate

C++ Code Review | 20-Item 'Checklist' [Essential for Professionals]

C++ code review checklist with the reasoning behind each check: ownership, const-correctness, exception safety, and concurrency review.
Apr 24, 2026 22 min read Intermediate

The Command Pattern in C++: Undo/Redo, Macros, Transactions and When It Is Overkill

The Command pattern in C++: turning requests into objects for undo/redo, macros, transactions, queues, and GUI or game input, plus when the pattern is overkill.
Apr 24, 2026 18 min read Intermediate

C++ Compilation Process Explained: Preprocessing, Compiling, Assembling, and Linking

From C++ source to executable: preprocessing, compilation, assembly, and linking, plus the link errors each stage causes (library order, templates, extern "C", ABI mismatches), rpath, LTO, and how C++20 modules change the pipeline.
Apr 24, 2026 24 min read Intermediate

The Composite Pattern in C++: Tree Ownership, Transparent vs Safe Designs and the LSP Problem

The Composite pattern in C++: treating leaves and containers uniformly, choosing raw pointers, unique_ptr or shared_ptr for ownership, file system and UI examples, and the transparent vs safe design trade-off.
Apr 24, 2026 16 min read Advanced

C++20 Concepts: Writing Readable Template Constraints with concept and requires

C++20 concepts and requires: the four constraint syntaxes, standard concepts, subsumption, real GCC/Clang errors and fixes, and migrating off enable_if.
Apr 24, 2026 10 min read Intermediate

Const Correctness in C++: const Members, Pointers, References and When mutable Is Fine

C++ const correctness: reading const pointers, const member functions and GCC errors, shallow const, thread-safe mutable, and const that blocks moves.
Apr 24, 2026 15 min read Intermediate

C++ Constant Initialization | 'Guide to Constant Initialization'

How C++ decides whether a constant is initialized at compile time or run time, and why that distinction matters for static and global variables.
Apr 24, 2026 12 min read Intermediate

C++20 consteval: Forcing Compile-Time Evaluation Where constexpr Only Allows It

C++20 consteval explained: immediate functions vs constexpr, why a constexpr wrapper cannot pass its parameter, if consteval, C++23 propagation, and real diagnostics.
Apr 23, 2026 22 min read Beginner

The Adapter Pattern in C++: Object vs Class Adapters for Legacy and Third-Party APIs

Adapter pattern in C++: object vs class adapter, payment/API examples, unique_ptr—bridge incompatible interfaces for legacy and third-party code.
Apr 23, 2026 12 min read Beginner

C++ Aggregate Initialization: What Counts as an Aggregate, C++17/20 Rule Changes, and Designated Initializers

Which structs and arrays are aggregates, why a defaulted constructor stops counting in C++20, base classes, designated initializers, parenthesized init, and narrowing errors.
Apr 13, 2026 12 min read Intermediate

C++ Static Initialization Order

Why globals in different C++ translation units initialize in an unspecified order, and how function-local statics, constinit and inline constexpr fix it.
Apr 13, 2026 18 min read Intermediate

Cache-Friendly C++: Data Locality, Struct Layout, AoS vs SoA and False Sharing

Writing cache-friendly C++: how CPU caches work, data locality, reducing cache misses, struct layout, AoS vs SoA, false sharing, and prefetching, with measurable examples.
Apr 13, 2026 8 min read Intermediate

5 Solutions to C++ Static Initialization Order Problem

5 practical solutions to solve C++ static initialization order problem causing global variable crashes.
Mar 31, 2026 12 min read Advanced

C++ Name Mangling: Reading _Z Symbols, extern "C", and Link Errors

How C++ compilers encode namespaces, overloads, const and templates into symbols, reading them with nm and c++filt, and when extern "C" fixes link errors.

C++ enum class: Scoped Enums, Underlying Types, Exhaustive switch, and Stable Serialized Values

C++ Memory Leaks: Causes, Detection, and Prevention

C++ RAII Explained | Why Constructors and Destructors Prevent Leaks

shared_ptr and weak_ptr Internals: Control Blocks, Cycles, enable_shared_from_this and Aliasing

C++ Casting

std::unique_ptr: Exclusive Ownership, make_unique, Custom Deleters and Moving Ownership

C++ Algorithm Reverse: std::reverse, reverse_copy &

C++ Inline Assembly: GCC Extended asm, Constraints and Clobbers, and Why Intrinsics Usually Win

C++20 Template Lambdas: []<typename T> Syntax, Concept Constraints and When They Beat auto

VDA5050 for AGV/AMR Fleets: MQTT Topics, Order and State Messages, and a C++ Implementation

C++ WebSocket Deep Dive | Handshake· Frames

C++ GDB: A Practical Debugger Guide

C++ Generic Lambdas — auto Parameters and Template Lambdas

C++ GUI | Beginner Guide to the Qt Framework

C++14 Init Capture: Moving unique_ptr into Lambdas, Reference Init and Evaluation Time

C++ Technical Interview

C++ Lambda Capture: By Value, By Reference, Init Capture, and the Lifetime Bugs Each One Invites

C++ Lambda Expressions | · capture

WebSocket in C++ with Boost.Beast: Handshake, Frames, Ping/Pong and Common Failures

C++ Filesystem Explained | std::filesystem (C++17) guide

Go in 2 Weeks #05

vcpkg for Reproducible C++ Builds: Manifest Mode, Triplets, Versioning and Overlay Ports

C++ Conan Basics — Install, conanfile, Profiles, CMake

C++ Build Systems Compared: CMake, Meson, Bazel, and Makefile

C++ Regular Expression Basics: std::regex Matching, Capture Groups and Tokenizing

C++ [[nodiscard]] Guide: Ignore Return Values Safely

C++ Performance Optimization: Measure First, Then Copies, Allocations, Cache and Compiler Flags

C++ vs Go | Performance, Concurrency, and Selection Guide

C++ DB Engine Fundamentals: Storage Engine and Query Parser

C++ Query Optimization Guide | Index Selection· Plans

C++ Advanced Profiling Guide | perf· gprof

C++ scoped_lock — Scoped locking, std::lock, and deadlock

C++ Compilation Pipeline — Preprocessing and Compilation

C++ Smart Pointers

C++ string fundamentals — std::string and C strings

C++ Package Managers: Escape “Library Install Hell” with

C++20 Concepts | Making Template Error Messages Readable

C++ Custom Ranges

C++ std::chrono Guide — duration, time_point, Clocks &

C++ RVO and NRVO: Copy Elision, Performance, and Why return

C++ Exception Safety — Basic, Strong, and Nothrow Guarantees

C++ extern Linkage — External vs Internal Linkage, extern

C++ Mutex & Lock — Mutual Exclusion and lock_guard

C++ Range-Based for: auto, References, and Temporaries

C++ Move Errors

Range-Based for Loop Errors in C++: Missing begin()/end() and Eight Other Pitfalls

C++ auto Type Deduction Errors

C++ Circular References: shared_ptr Leaks and Breaking

C++ File Status | 'File Status' Guide

Missing Virtual Destructor: Why Deleting Through a Base Pointer Leaks or Worse

C++ Object Slicing: How Copying Through a Base Type Loses Data and Polymorphism

"undefined reference to vtable": What the Linker Is Telling You and How to Fix It

C++ Name Hiding: Why a Derived Function Hides Base Overloads and How using Fixes It

C++23 std::expected: Returning Errors as Values, Monadic Chaining, and Access Pitfalls

C++ Function Pointer | 'Function Pointer' Guide

C++ nullptr | 'Null Pointer' Guide

C++26 Is Finalized: Reflection, Contracts, std::execution and Other Key Changes

Implementing Data Structures in C++: Linked List, BST, and Hash Table, and the Bugs Each One Hides

C++ Default Arguments: Rules, Virtual Function Traps, and API Design

Design Patterns in Modern C++: What Singleton, Factory, Observer, Strategy and Visitor Look Like After C++17

Setting Up a C++ Development Environment: OS, Hardware, IDE, Compilers and Sanitizers

C++ Dynamic Initialization: When Globals and Statics Run Their Initializers

C++ EBCO and [[no_unique_address]]

Why Visual Studio C++ Builds Are Slow: PCH, /MP, Incremental Linking and Forward Declarations

Fixing "multiple definition" Linker Errors in C++: ODR, Header Definitions and inline

"passing const as this discards qualifiers": Ten C++ const Errors and Their Fixes

Lambdas That Crash Later: Dangling Reference Captures and How to Capture Safely

C++ struct vs class: The One Language Difference and the Conventions Built on It

C++ malloc vs new vs make_unique

std::condition_variable: Waiting on Events Without Spurious Wakeup and Lost Notify Bugs

C++17 constexpr Lambdas: Implicit constexpr, Captures, and Limits

C++ Custom Deleters | 'Custom Deleter' Guide

Cache Eviction Beyond LRU: FIFO, Clock, Random and MRU in C++ with a Trace Simulator

C++20 Calendar and Time Zones: year_month_day, zoned_time and DST Pitfalls

std::call_once and once_flag: Thread-Safe One-Time Initialization vs static Locals

Fast C++ I/O for Coding Tests: What sync_with_stdio, cin.tie and endl Actually Do

Modern C++ Syntax Cheatsheet: C++11 to C++20 Features and Their Pitfalls

Measuring C++ Code Coverage: gcov, lcov Reports, Google Test and CI Uploads

10 C++ Compile and Link Errors Beginners Hit First, and What Each Message Means

vector vs list vs deque: Why Cache Locality Usually Beats Big-O