Go

Go Function Scope: Illustrating Variable Visibility and Lifetime

This code snippet demonstrates how variables declared within a function in Go have limited scope and lifetime. It showcases how variables are accessible only within the function they are defined in...

Go Variables and Constants

Defining Structs in Go

This snippet demonstrates how to define and use structs in Go, showcasing different field types and initialization methods. Structs are fundamental building blocks for creating custom data types in...

Go Structs and Interfaces

Panic and Recover in Go

This code demonstrates how to use panic and recover in Go to handle unexpected errors and prevent program crashes. It shows a simple scenario where a function panics due to an invalid index access,...

Go Core Go Basics

Iota: Enumerated Constants in Go

Learn how to use iota in Go to create enumerated constants, providing a clean and maintainable way to define sequences of related values. This example showcases basic usage, skipping values, and...

Go Variables and Constants

Reading from a File Line by Line with bufio.Scanner

This snippet demonstrates how to efficiently read a file line by line using `bufio.Scanner` in Go. It covers opening the file, reading its content, and handling potential errors.

Go File and I/O

Understanding Bytes and Runes in Go

This example demonstrates the difference between bytes and runes in Go, and how they are used to represent characters. It showcases how runes handle Unicode characters, including those outside the...

Go Core Go Basics

Goroutine Leak in a <code>for-select</code> Loop Without a <code>default</code> Case

This example demonstrates how a missing default case in a for-select loop can lead to a goroutine leak and illustrates how to prevent it using a context and a default case.

Go Concurrency

Go Benchmark Timers: Measuring Execution Time

This example demonstrates how to use benchmark timers in Go to accurately measure the execution time of a function. We'll explore how to start and stop the timer to exclude setup costs from the...

Go Testing and Benchmarking

Goroutine Leak with Unbuffered Channels

This example demonstrates a goroutine leak scenario using an unbuffered channel and explains how to prevent it.

Go Concurrency

Fan-Out and Fan-In in Go

Demonstrates the fan-out and fan-in concurrency pattern in Go, enabling parallel processing of tasks and aggregation of results.

Go Concurrency

Panic Example: Nil Pointer Dereference

This code snippet demonstrates a common scenario that triggers a panic in Go: dereferencing a nil pointer. It highlights how the Go runtime handles such situations and the importance of checking for...

Go Error Handling

Simple 'if' statement in Go

This snippet demonstrates a basic 'if' statement in Go, showing how to execute code conditionally based on a boolean expression.

Go Core Go Basics

Custom JSON Encoding with Methods

This example demonstrates how to customize JSON encoding by implementing the `json.Marshaler` interface. This allows you to control exactly how your data is serialized to JSON, useful for formatting,...

Go Web Development

Recovering from Panic in Go

This snippet demonstrates how to use the `recover` function in Go to gracefully handle panics and prevent program termination.

Go Error Handling

Break and Continue Statements in Go

This snippet demonstrates the usage of break and continue statements within loops in Go, showcasing how they alter the normal flow of execution.

Go Core Go Basics

Constant Declaration in Go

This example demonstrates how to declare and use constants in Go. Constants are immutable values that are known at compile time. They are useful for defining values that should not change during the...

Go Variables and Constants

Typed vs Untyped Constants in Go

Understanding the difference between typed and untyped constants in Go, how they are declared, and when to use each type. This guide explores the nuances of constant declaration and initialization,...

Go Variables and Constants

Anonymous Structs in Go

This code snippet demonstrates the use of anonymous structs in Go, showcasing their declaration, initialization, and practical use cases. Anonymous structs are useful for defining ad-hoc data...

Go Structs and Interfaces

Understanding Go Garbage Collection with a Simple Example

This example demonstrates how Go's garbage collector works by creating and releasing memory. We'll examine how the garbage collector reclaims unused memory, preventing memory leaks.

Go Memory Management

Go Switch Statement - Basic Example

This snippet demonstrates the fundamental usage of a switch statement in Go. It shows how to evaluate a variable against different cases and execute the corresponding code block. This is the simplest...

Go Core Go Basics

Reading from Standard Input in Go

This snippet demonstrates how to read data from standard input (os.Stdin) in Go. It covers reading line by line and reading until EOF, providing flexibility for different input scenarios. This is...

Go File and I/O

Go Comparison Operators: A Comprehensive Guide

This snippet demonstrates the use of comparison operators in Go. Comparison operators are used to compare two values and return a boolean value (true or false) based on the relationship between them....

Go Core Go Basics

Basic Function Definition in Go

This snippet demonstrates how to define a simple function in Go, including specifying parameters and return values. It covers the fundamental syntax and provides a clear example.

Go Core Go Basics

Shadowing Variables in Go

This example demonstrates how variable shadowing works in Go. Shadowing occurs when a variable is declared in a scope that is nested within another scope where a variable with the same name is already...

Go Variables and Constants

Understanding Blank Imports in Go

Blank imports in Go, denoted by `_`, are a peculiar yet powerful feature. They allow you to import a package solely for its side effects, such as initializing variables or registering drivers, without...

Go Packages and Modules

Wrapping Errors in Go

This example demonstrates how to wrap errors in Go, providing context and preserving the original error's information. Error wrapping is crucial for creating robust and maintainable applications.

Go Error Handling

Understanding Integer Types in Go

This snippet demonstrates the different integer types available in Go and how to use them. Go offers various integer types, each with a different size and range, allowing you to optimize memory usage...

Go Core Go Basics

Go Type Switches: Unveiling Dynamic Type Handling

Explore Go's type switches for handling variables of different types within a single code block. This snippet demonstrates how to effectively use type switches to perform different actions based on...

Go Structs and Interfaces

Go Memory Profiling with pprof

This snippet demonstrates how to use Go's built-in `pprof` package to profile memory usage, specifically focusing on heap and stack analysis. It includes an example program that allocates memory and...

Go Memory Management

Creating Goroutines in Go

This example demonstrates how to create and run goroutines in Go, showcasing the basic syntax and functionality.

Go Concurrency