Every article tagged Go, in one place.
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Go is a small, compiled language designed at Google for building reliable server software. Docker, Kubernetes, Terraform and many cloud tools are written in it. Its appeal is simplicity: a small language, fast builds, a single static binary and great built-in...
A goroutine is a lightweight thread managed by the Go runtime. You can run hundreds of thousands of them. Channels let goroutines pass data safely. Start goroutines and wait for them var wg sync.WaitGroup urls := []string{"https://go.dev", "https://pkg.go.dev"...
In Go, errors are ordinary values returned alongside results. The pattern is repetitive by design: it keeps every failure path visible. The basic pattern f, err := os.Open("config.json") if err != nil { return fmt.Errorf("open config: %w", err) } defer f.Close...
Go developers used to reach for a router package as soon as they needed path parameters. Since Go 1.22, the standard http.ServeMux supports HTTP methods and wildcards, which covers most APIs. The server package main import ( "encoding/json" "log" "net/http" "s...
Generics arrived in Go 1.18. They let you write functions and types that work for many types while staying type-safe, without falling back to interface{} and type assertions. A generic function func Map[T, U any](items []T, fn func(T) U) []U { out := make([]U,...
A context.Context carries a cancellation signal and an optional deadline through a chain of function calls. When a user closes the browser tab, every database query and HTTP call made for that request can stop. Every request already has one func handleSearch(w...
Go's testing tools are built in: no framework to choose. Tests live next to the code in _test.go files. Table-driven tests // slug_test.go func TestSlugify(t *testing.T) { tests := []struct { name, in, want string }{ {"simple", "Hello World", "hello-world"}, {...
A Go module is a collection of packages versioned together, defined by a go.mod file at its root. go.mod module github.com/acme/shop go 1.25 require ( github.com/jackc/pgx/v5 v5.7.1 golang.org/x/sync v0.10.0 ) Everyday commands go mod init github.com/acme/shop...
Since Go 1.23, for range can loop over functions . This gives Go a standard way to write iterators for custom data structures, database rows or paginated APIs. The iterator types // package iter type Seq[V any] func(yield func(V) bool) type Seq2[K, V any] func...
Plain text logs are hard to search at scale. Structured logs attach key-value fields to each message, so you can filter by user_id or status in your log platform. Go's standard library includes log/slog for this. Getting started import ( "log/slog" "os" ) func...
