rand

Documentation

Index

• func Bool() bool
• func Bytes(n int) []byte
• func Float32() float32
• func Float64() float64
• func Int() int
• func Int16() int16
• func Int31() int32
• func Int31n(n int32) int32
• func Int32() int32
• func Int63() int64
• func Int63n(n int64) int64
• func Int64() int64
• func Intn(n int) int
• func NewRand() *mrand.Rand
• func Perm(n int) []int
• func Reseed()
• func Seed(seed int64)
• func Str(length int) string
• func Time() time.Time
• func Uint() uint
• func Uint16() uint16
• func Uint32() uint32
• func Uint64() uint64
• type Rand
  • func (r *Rand) Bool() bool
  • func (r *Rand) Bytes(n int) []byte
  • func (r *Rand) Float32() float32
  • func (r *Rand) Float64() float64
  • func (r *Rand) Int() int
  • func (r *Rand) Int16() int16
  • func (r *Rand) Int31() int32
  • func (r *Rand) Int31n(n int32) int32
  • func (r *Rand) Int32() int32
  • func (r *Rand) Int63() int64
  • func (r *Rand) Int63n(n int64) int64
  • func (r *Rand) Int64() int64
  • func (r *Rand) Intn(n int) int
  • func (r *Rand) Perm(n int) []int
  • func (r *Rand) Seed(seed int64)
  • func (r *Rand) Str(length int) string
  • func (r *Rand) Time() time.Time
  • func (r *Rand) Uint() uint
  • func (r *Rand) Uint16() uint16
  • func (r *Rand) Uint32() uint32
  • func (r *Rand) Uint64() uint64

Functions

func Bool

func Bool() bool

func Bytes

func Bytes(n int) []byte

Bytes returns n random bytes generated from math/rand's global default Source.

func Float32

func Float32() float32

func Float64

func Float64() float64

func Int

func Int() int

func Int16

func Int16() int16

func Int31

func Int31() int32

func Int31n

func Int31n(n int32) int32

func Int32

func Int32() int32

func Int63

func Int63() int64

func Int63n

func Int63n(n int64) int64

func Int64

func Int64() int64

func Intn

func Intn(n int) int

func NewRand

func NewRand() *mrand.Rand

NewRand returns a prng, that is seeded with OS randomness. The OS randomness is obtained from crypto/rand, however, like with any math/rand.Rand object none of the provided methods are suitable for cryptographic usage.

Note that the returned instance of math/rand's Rand is not suitable for concurrent use by multiple goroutines.

For concurrent use, call Reseed to reseed math/rand's default source and use math/rand's top-level convenience functions instead.

func Perm

func Perm(n int) []int

func Reseed

func Reseed()

Reseed conveniently re-seeds the default Source of math/rand with randomness obtained from crypto/rand.

Note that this does not make math/rand suitable for cryptographic usage.

Use math/rand's top-level convenience functions remain suitable for concurrent use by multiple goroutines.

func Seed

func Seed(seed int64)

func Str

func Str(length int) string

Str constructs a random alphanumeric string of given length from math/rand's global default Source.

func Time

func Time() time.Time

func Uint

func Uint() uint

func Uint16

func Uint16() uint16

func Uint32

func Uint32() uint32

func Uint64

func Uint64() uint64

Types

type Rand

type Rand struct {
	tmsync.Mutex
	// contains filtered or unexported fields
}

func (*Rand) Bool

func (r *Rand) Bool() bool

Bool returns a uniformly random boolean

func (*Rand) Bytes

func (r *Rand) Bytes(n int) []byte

Bytes returns n random bytes generated from the internal prng.

func (*Rand) Float32

func (r *Rand) Float32() float32

func (*Rand) Float64

func (r *Rand) Float64() float64

func (*Rand) Int

func (r *Rand) Int() int

func (*Rand) Int16

func (r *Rand) Int16() int16

func (*Rand) Int31

func (r *Rand) Int31() int32

func (*Rand) Int31n

func (r *Rand) Int31n(n int32) int32

func (*Rand) Int32

func (r *Rand) Int32() int32

func (*Rand) Int63

func (r *Rand) Int63() int64

func (*Rand) Int63n

func (r *Rand) Int63n(n int64) int64

func (*Rand) Int64

func (r *Rand) Int64() int64

func (*Rand) Intn

func (r *Rand) Intn(n int) int

Intn returns, as an int, a uniform pseudo-random number in the range [0, n). It panics if n <= 0.

func (*Rand) Perm

func (r *Rand) Perm(n int) []int

Perm returns a pseudo-random permutation of n integers in [0, n).

func (*Rand) Seed

func (r *Rand) Seed(seed int64)

func (*Rand) Str

func (r *Rand) Str(length int) string

Str constructs a random alphanumeric string of given length.

func (*Rand) Time

func (r *Rand) Time() time.Time

func (*Rand) Uint

func (r *Rand) Uint() uint

func (*Rand) Uint16

func (r *Rand) Uint16() uint16

func (*Rand) Uint32

func (r *Rand) Uint32() uint32

func (*Rand) Uint64

func (r *Rand) Uint64() uint64