Go

Slices, maps, errors and concurrency primitives for everyday Go.

Tooling

go mod init example.com/appInitialize a module

go test ./...Run package tests

go vet ./...Run static correctness checks

gofmt -w main.goFormat a source file

names := []string{"Ada", "Lin"}Create a slice

names = append(names, "Sam")Append and retain the resulting slice

scores := map[string]int{"Ada": 10}Create a map

value, ok := scores["Ada"]Distinguish missing keys from zero values

func add(a, b int) int { return a + b }Define a typed function

if err != nil { return fmt.Errorf("load: %w", err) }Wrap an error while preserving its cause

go work()Start a goroutine; coordinate its lifecycle explicitly

ch := make(chan int, 1)Create a channel with capacity one