randx

Documentation

Index

• type Rand
  • func New() *Rand
  • func NewWithSeed(seed int64) *Rand
  • func (r *Rand) Int32Within(bound int32) (int32, error)
  • func (r *Rand) Int64Within(bound int64) (int64, error)
  • func (r *Rand) IntBetween(low int, high int) (int, error)
  • func (r *Rand) IntWithin(bound int) (int, error)
  • func (r *Rand) MustIntBetween(low int, high int) int
  • func (r *Rand) MustIntWithin(bound int) int

Types

type Rand

type Rand struct {
	rand.Rand
}

Rand is a rand with more useful methods

func New

func New() *Rand

New return a new Rand using timestamp as seed

func NewWithSeed

func NewWithSeed(seed int64) *Rand

NewWithSeed return a new Rand using seed

func (*Rand) Int32Within

func (r *Rand) Int32Within(bound int32) (int32, error)

Int32Within return a random int32 value within range [0, bound) if bound larger than 0, return an error if bound is less than or equals 0.

func (*Rand) Int64Within

func (r *Rand) Int64Within(bound int64) (int64, error)

Int64Within return a random int64 value within range [0, bound). If bound is less than or equals with 0, return an error

func (*Rand) IntBetween

func (r *Rand) IntBetween(low int, high int) (int, error)

IntBetween return a random value within range [low, high) if low less than high, return an error if low is larger than or equals high, or high-low overflows int.

func (*Rand) IntWithin

func (r *Rand) IntWithin(bound int) (int, error)

IntWithin return a random value within range [0, bound) if bound larger than 0, return an error if bound is less than or equals 0.

func (*Rand) MustIntBetween

func (r *Rand) MustIntBetween(low int, high int) int

MustIntBetween return a random value within range [low, high). panics if low is larger than or equals high, or high-low overflows int.

func (*Rand) MustIntWithin

func (r *Rand) MustIntWithin(bound int) int

MustIntWithin return a random value within range [0, bound) if bound larger than 0. panics bound is less than or equals 0.