rand

Documentation

Overview

Package rand provides utilities related to randomization.

Index

• func Int63nRange(min, max int64) int64
• func Intn(max int) int
• func IntnRange(min, max int) int
• func Perm(n int) []int
• func Seed(seed int64)
• func Shuffle(data Shufflable)
• func String(length int) string
• type Shufflable

Functions

func Int63nRange

func Int63nRange(min, max int64) int64

IntnRange generates an int64 integer in range [min,max). By design this should panic if input is invalid, <= 0.

func Intn

func Intn(max int) int

Intn generates an integer in range [0,max). By design this should panic if input is invalid, <= 0.

func IntnRange

func IntnRange(min, max int) int

IntnRange generates an integer in range [min,max). By design this should panic if input is invalid, <= 0.

func Perm

func Perm(n int) []int

Perm returns, as a slice of n ints, a pseudo-random permutation of the integers [0,n) from the default Source.

func Seed

func Seed(seed int64)

Seed seeds the rng with the provided seed.

func Shuffle

func Shuffle(data Shufflable)

func String

func String(length int) string

String generates a random alphanumeric string n characters long. This will panic if n is less than zero.

Types

type Shufflable

type Shufflable interface {
	Len() int
	Swap(i, j int)
}

A type that satisfies the rand.Shufflable interface can be shuffled by Shuffle. Any sort.Interface will satisfy this interface.