randutil

package module

v3.0.1 Latest Latest Go to latest Published: Jan 15, 2020 License: MIT Imports: 5 Imported by: 0

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This is a Go package for providing some utilities for random.

This Package randutil provides a utility function to get non-negative pesudo-random int using math/rand or crypto/rand.

This package also provides Chooser which chooses an item from choices. Each choice has a weight which affects possibility for it to be choosed.

MIT

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func MultiIntnNoDup(src rand.Source, m, n int) []int

MultiIntnNoDup returns m multiple random integers of range [0, n) without duplication.

func NewSeed() uint64

NewSeed creats a new random seed.

type Uniform struct {
	// contains filtered or unexported fields
}

Uniform is a uniform random chooser.

func NewUniform(src rand.Source) *Uniform

NewUniform creates a Uniform instance.

func (u *Uniform) Choose(values []string) string

Choose chooses one value from values randomly.

type Weighted struct {
	// contains filtered or unexported fields
}

Weighted is a weighted random chooser.

func NewWeighted(src rand.Source, weights []float64) *Weighted

NewWeighted creates a weighted random chooser. If src is nil, the rand.Float will be used.

func (w *Weighted) Choose(values []string) string

Choose chooses one value from values.