cmp

Core
import "cmp"

Provides types and functions related to ordered comparison (Go 1.21+).

Example

package main

import (
    "cmp"
    "fmt"
)

func main() {
    fmt.Println(cmp.Compare(3, 5))   // -1
    fmt.Println(cmp.Compare(5, 5))   // 0
    fmt.Println(cmp.Or(0, 42))        // 42
}

Key Types & Functions

CompareLessOrOrdered

About cmp

The cmp package (imported as cmp) belongs to the Core category of Go packages. Provides types and functions related to ordered comparison (Go 1.21+).

Go's standard library is one of the language's greatest strengths, providing production-ready implementations for networking, cryptography, encoding, I/O, and more. The cmp package follows Go's philosophy of simplicity and composability — small, focused packages that combine through interfaces like io.Reader and io.Writer.

When using cmp in production, follow Go best practices: handle errors explicitly, use context for cancellation and timeouts, prefer composition over inheritance, and write table-driven tests. The Go documentation at pkg.go.dev provides comprehensive API references and examples for every exported type and function.

Related Packages

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