common

Documentation

Index

• func RandBytes(n int) []byte
• func RandInt() int
• func RandInt31() int32
• func RandPerm(n int) []int
• func RandStr(length int) string
• func Seed(seed int64)
• type Rand
  • func NewRand() *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 RandBytes

func RandBytes(n int) []byte

func RandInt

func RandInt() int

func RandInt31

func RandInt31() int32

func RandPerm

func RandPerm(n int) []int

func RandStr

func RandStr(length int) string

func Seed

func Seed(seed int64)

Types

type Rand

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

Rand is a prng, that is seeded with OS randomness. The OS randomness is obtained from crypto/rand, however none of the provided methods are suitable for cryptographic usage. They all utilize math/rand's prng internally.

All of the methods here are suitable for concurrent use. This is achieved by using a mutex lock on all of the provided methods.

func NewRand

func NewRand() *Rand

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