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Showing posts tagged Low Level & Performance · View all posts

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Error Handling in Go: Why 'if err != nil' is Everywhere
Error Handling in Go: Why 'if err != nil' is Everywhere
Go handles errors explicitly. Every function that can fail returns an error, and you check it immediately. It's verbose, but deliberate. Understanding why this pattern exists helps you write clearer,... Read more...
Understanding .unwrap() in Rust: When to Use It (and When Not To)
Understanding .unwrap() in Rust: When to Use It (and When Not To)
.unwrap() extracts values from Result and Option types, but panics if they contain errors or None. It's convenient, sometimes necessary, and often the wrong choice. Knowing when to use it... Read more...
Mutable References in Rust: The &mut self Pattern Explained
Mutable References in Rust: The &mut self Pattern Explained
Mutable references let you modify borrowed data. The &mut self pattern appears in method signatures throughout Rust code, enforcing the borrowing rules that prevent data races at compile time. Read more...
Man sitting at a desk working on a computer with the black t-shirt on which the #[derive(Debug)] code snippet is written
Rust's Derive Macro: Understanding #[derive(Debug)]
Derive macros in Rust generate trait implementations automatically. The Debug trait is usually the first one you derive, and understanding why it exists reveals how Rust balances convenience with explicitness. Read more...
package main in Go: Understanding the Entry Point
package main in Go: Understanding the Entry Point
Every executable Go program starts with package main. It's not just convention—the compiler treats it differently. Understanding why this package is special helps when structuring Go projects. Read more...
Goroutines in Go: How go func() Enables Concurrency
Goroutines in Go: How go func() Enables Concurrency
Goroutines make concurrency accessible. They're cheap, simple to spawn, and backed by a runtime that handles the complexity. Understanding how they work—and how they differ from threads—changes how you think... Read more...
Go Channels Explained: Understanding <-chan for Receive-Only Channels
Go Channels Explained: Understanding <-chan for Receive-Only Channels
Channels in Go enable communication between goroutines. The direction syntax—<-chan for receive-only, chan<- for send-only—isn't just about safety. It's about making concurrent code easier to reason about. Read more...
C++ Header Guards: #pragma once vs #ifndef Explained
C++ Header Guards: #pragma once vs #ifndef Explained
Header guards prevent multiple inclusion. The choice between #pragma once and traditional #ifndef guards is less about correctness and more about tradeoffs you can actually reason about. Read more...
Understanding std::cout and the Null Character in C++
Understanding std::cout and the Null Character in C++
std::cout is how most people first print to the console in C++. It's simple to use, but understanding what happens under the operator << matters when output doesn't behave the... Read more...
std::vector in C++: The Dynamic Array You Actually Use
std::vector in C++: The Dynamic Array You Actually Use
std::vector is the default container in C++. It's a dynamic array that handles memory for you, grows when needed, and performs well enough for most use cases. Understanding when and... Read more...
Command Line Arguments in C: Mastering char *argv[]
Command Line Arguments in C: Mastering char *argv[]
Command line arguments are one of C’s most powerful features. This guide breaks down argc and argv[], explains what char *argv[] really means, and shows practical patterns for parsing user... Read more...
C++ Templates: Understanding template<typename T>
C++ Templates: Understanding template
Templates let you write code that works with any type. They're powerful, sometimes misused, and essential to modern C++. Understanding when to reach for them—and when not to—matters as much... Read more...