Go Tutorials

What is Go? History, Simplicity and Concurrency Explained

Go is a statically typed compiled language created at Google for building efficient, reliable software at scale with built-in concurrency and simple syntax.

Go Installation Guide — Set Up Go on Linux macOS and Windows

Learn how to install Go using go install, configure GOPATH and modules, and set up your development environment for Go programming.

Go Hello World — Package main func main and go run Explained

Go's hello world demonstrates package main for executables, func main as the entry point, the fmt package for output, and go run for quick execution.

Go Variables and Data Types — var := Zero Values and Constants Explained

Go variables use var or := for type inference with static typing, zero values for automatic initialization, and constants with specific types.

Go Control Flow — if else for switch and defer Explained

Go control flow includes if/else with initialization statements, for as the only loop keyword, switch with expressionless cases, and defer for cleanup.

Go Functions — func Multiple Returns Named Returns and Variadic Parameters

Go functions defined with func support multiple return values, named returns for documentation, variadic parameters with ..., and first-class function values.

Go Arrays and Slices — Fixed Arrays append make and copy Explained

Go arrays have fixed size at compile time while slices are dynamically-sized views backed by arrays with append, make, and copy for flexible collection management.

Go Maps and Structs — map struct Tags and Zero Values Explained

Go maps provide key-value storage with O(1) lookup, structs group related fields with optional tags for serialization, and both have zero values for safe initialization.

Go Pointers — & * nil new and Pointer Receivers Explained

Go pointers hold memory addresses using & for address-of and * for dereference, with nil for safe zero values and pointer receivers for method modification.

Go Methods — Value Receivers Pointer Receivers and Method Sets Explained

Go methods are functions with a receiver argument that can be a value or pointer type, enabling object-oriented behavior through method sets and interface satisfaction.

Go Interfaces — Implicit Satisfaction Type Assertions and Empty Interface Explained

Go interfaces define behavior through method sets with implicit satisfaction, enabling polymorphism through type assertions, type switches, and the empty interface for unknown types.

Go Embedding — Struct Embedding Interface Embedding and Method Promotion Explained

Go embedding allows one struct or interface to include another, promoting its fields and methods to the embedding type for composition-based reuse without inheritance.

Go Error Handling — Error Interface Error Wrapping and Sentinel Errors Explained

Go error handling uses the error interface with explicit return values, %w wrapping for error chains, errors.Is and errors.As for inspection, and sentinel errors for predefined failures.

Go Panic and Recover — defer panic recover and Safe Error Handling Explained

Go panic and recover provide error handling for exceptional conditions with defer for cleanup, panic for unrecoverable errors, and recover for catching panics in goroutines.

Go Packages and Modules — go.mod, Import Paths and Package Visibility Explained

Go packages organize code with exports (capitalized) and unexports (lowercase), while modules defined in go.mod manage dependencies, versioning, and import paths.

Go Testing — Table Tests Benchmarks Coverage and Test Suites Explained

Go testing uses the testing package with t *testing.T for unit tests, t *testing.B for benchmarks, table-driven tests for multiple cases, and go test -cover for coverage analysis.

Go Goroutines — go Keyword WaitGroups and Concurrent Execution Explained

Go goroutines are lightweight threads started with the go keyword, enabling concurrent execution with WaitGroups for synchronization and channel communication.

Go Channels — Unbuffered Buffered Range and Directional Channels Explained

Go channels provide typed communication between goroutines with unbuffered for synchronization, buffered for async, range for iteration, and directional types for type safety.

Go Select — Multiplexing Channel Operations with Select Statement

Go select statement multiplexes channel operations with case branches for non-blocking sends, receives, timeouts, and default cases.

Go WaitGroups — Synchronizing Goroutines with sync.WaitGroup

Go sync.WaitGroup synchronizes goroutine completion with Add, Done, and Wait methods for coordinating parallel work.

Go Mutexes — Protecting Shared State with sync.Mutex and sync.RWMutex

Go sync.Mutex and sync.RWMutex protect shared state in concurrent programs with Lock/Unlock for exclusive access and RLock/RUnlock for read sharing.

Go Context — Cancellation, Deadlines, and Values with context.Context

Go context.Context propagates cancellation signals, deadlines, and request-scoped values across API boundaries and goroutine hierarchies.

Go Worker Pools — Managing Concurrent Work with Worker Goroutines

Go worker pools manage concurrent work using a fixed number of goroutines consuming jobs from a channel with results collected via sync.WaitGroup.

Go Concurrency Patterns — Pipeline, Fan-Out/In, Generator, and Error Handling

Go concurrency patterns include pipelines for streaming data, fan-out/fan-in for parallelism, generators for lazy sequences, and errgroups for error handling.

Go File I/O — Reading and Writing Files with os, bufio, ioutil, and io Package

Go file I/O uses os.File for low-level operations, bufio for buffered reading/writing, io package for streams, and os.ReadFile/WriteFile for simplicity.

Go JSON — Encoding and Decoding JSON with encoding/json and Struct Tags

Go JSON handling uses encoding/json for Marshal/Unmarshal with struct tags for field mapping and custom marshaling for complex data.

Go HTTP Servers — Building Web Servers with net/http Package and Handlers

Go net/http package provides HTTP server capabilities with Handler interface, ServeMux for routing, and middleware for cross-cutting concerns.

Go HTTP Client — Making HTTP Requests with net/http Client and Transport

Go http.Client makes HTTP requests with configurable Transport, timeouts, and connection pooling for efficient API communication.

Go Database SQL — SQL Database Operations with database/sql and Drivers

Go database/sql package provides generic SQL database interface with connection pooling, prepared statements, transactions, and row scanning.

Go GORM — ORM for Go with GORM Library and Database Migrations

Go GORM provides an ORM with automatic migrations, association management, query building, and hooks for PostgreSQL, MySQL, and SQLite.

Go Generics — Type Parameters for Reusable Go Functions and Types

Go generics provide type parameters for functions and types with constraint interfaces allowing type-safe reusable code without runtime type assertions.

Go Reflection — Runtime Type Inspection and Manipulation with reflect Package

Go reflect package enables runtime type inspection with TypeOf, ValueOf, and method calling for dynamic programming patterns.

Go CGo — Calling C Code from Go with cgo and Build Tags

Go CGo enables C code integration with import "C" directive, C type mapping, memory management, and build tag conditional compilation.

Go Advanced Testing — Table-Driven Tests, Fuzzing, Test Coverage, and Benchmarks

Go advanced testing includes table-driven tests, fuzzing with testing.F, test coverage analysis, and subtest/subbenchmark organization.

Go Benchmarking — Performance Testing with testing.B and Benchmark Functions

Go benchmarking measures performance with testing.B for timing, b.N for iterations, and benchstat for statistical comparison of benchmark results.

Go Profiling — Performance Profiling with pprof and Trace for CPU, Memory, and Goroutines

Go pprof profiles CPU, memory, goroutine, and block contention with runtime/pprof and net/http/pprof for production profiling.

Go Modules — Dependency Management with go mod and Module Versioning

Go modules manage dependencies with go.mod and go.sum files, semantic versioning, and version selection for reproducible builds.

Go Dependency Management — Managing Dependencies with go mod and Vendoring Strategies

Go dependency management uses go mod for version control, replace directives for local overrides, and vendor directories for reproducible builds.

Go CLI Applications — Building Command-Line Tools with flag, cobra, and os/exec

Go CLI applications use flag package for simple args, cobra for complex commands, and os/exec for running external processes.

Go Web Frameworks — Building Web Applications with Gin, Echo, and Fiber

Go web frameworks like Gin, Echo, and Fiber provide routing, middleware, and context utilities for building high-performance web applications.

Go Middleware — HTTP Middleware Patterns for Logging, Auth, Rate Limiting, and CORS

Go HTTP middleware chains functions that wrap http.Handler for cross-cutting concerns like logging, authentication, rate limiting, and CORS.

Go Testing HTTP Handlers — Testing HTTP Servers with httptest and Test Suites

Go httptest package provides NewRecorder for handler testing and NewServer for integration testing with real HTTP requests and responses.

Go Deployment — Deploying Go Applications with Docker, Multi-stage Builds, and CI/CD

Go deployment uses Docker multi-stage builds for small images, CI/CD pipelines with testing, and cloud platform deployment to AWS, GCP, and Fly.io.

Go Microservices — Building Microservices with Go, gRPC, and Message Queues

Go microservices use HTTP/gRPC for communication, message queues for async processing, and service discovery for distributed architecture.

Go Mini Projects — Build Real-World Go Applications from Scratch

Go mini projects build a REST API server, CLI task manager, URL shortener, and file server applying slices, goroutines, HTTP, and JSON skills.

Go Ecosystem — Community, Frameworks, Tools, and Best Practices

Go ecosystem includes Gin and Echo for web, GORM for databases, test frameworks, and community resources like Go by Example and Awesome Go.

Go Testing Advanced — Fuzzing, Mocking, and Integration Testing Patterns

Go advanced testing covers fuzzing with testing.F, mock generation with GoMock, golden files, and integration tests with testcontainers.

Go Application Deployment — Deploying Go Applications with Systemd, Docker, and Cloud Services

Go deployment strategies include systemd service management, Docker multi-stage builds, and cloud deployment to Fly.io, Railway, and AWS Lambda.

Go Web APIs — Building Production REST APIs with Go, Validation, and Documentation

Go web APIs use Gin/Echo for routing, go-playground/validator for validation, and swaggo/swag for OpenAPI documentation generation.

Go Advanced Topics — Reflection, CGo, Code Generation, and Tooling for Expert Go

Go advanced topics include code generation with go generate, build tags for conditional compilation, plugin system, and WASM compilation.

Go Generics Basics — Complete Guide

Learn Go generics with type parameters, allowing functions and data structures to operate on different types while maintaining compile-time type safety.

Go Error Wrapping and errors.Is

Learn Go error wrapping with fmt.Errorf and %w, and how errors.Is and errors.As traverse the error chain for reliable sentinel error detection in your code.

Go Mutex Deadlock — Complete Guide

Learn Go mutex deadlock patterns, how improper lock ordering causes goroutines to block indefinitely, and strategies like lock hierarchies to prevent them.

Go Channel Patterns — Complete Guide

Learn Go channel communication patterns including fan-in, fan-out, pipeline, and worker pools for coordinating concurrent goroutines without shared memory.

Go Select Multiplexing — Complete Guide

Learn Go select statements for multiplexing channel operations, enabling goroutines to wait on multiple channels and respond to the first available one.

Go Context Deadline — Complete Guide

Learn the Go context package for propagating deadlines, cancellations, and request-scoped values across API boundaries and inside goroutine tree structures.

Go Sync WaitGroup — Complete Guide

Learn Go sync.WaitGroup for waiting on a collection of goroutines to finish, a fundamental synchronization primitive for coordinating concurrent work.