rand

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v1.0.5 Latest Latest Go to latest Published: May 9, 2022 License: Apache-2.0 Imports: 7 Imported by: 0

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github.com/line/ostracon

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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 Perm(n int) []int
func RandomThreshold(seed *uint64, total uint64) uint64
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 Candidate
- func RandomSamplingWithPriority(seed uint64, candidates []Candidate, sampleSize int, totalPriority uint64) (samples []Candidate)
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

Constants ¶

This section is empty.

Variables ¶

This section is empty.

Functions ¶

func Bool ¶

func Bool() bool

func Bytes ¶

func Bytes(n int) []byte

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 Perm ¶

func Perm(n int) []int

func RandomThreshold ¶

func RandomThreshold(seed *uint64, total uint64) uint64

func Seed ¶

func Seed(seed int64)

func Str ¶

func Str(length int) string

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 Candidate ¶

type Candidate interface {
	Priority() uint64
	LessThan(other Candidate) bool
}

Interface for performing weighted deterministic random selection.

func RandomSamplingWithPriority ¶

func RandomSamplingWithPriority(
	seed uint64, candidates []Candidate, sampleSize int, totalPriority uint64) (samples []Candidate)

Select a specified number of candidates randomly from the candidate set based on each priority. This function is deterministic and will produce the same result for the same input.

Inputs: seed - 64bit integer used for random selection. candidates - A set of candidates. The order is disregarded. sampleSize - The number of candidates to select at random. totalPriority - The exact sum of the priorities of each candidate.

Returns: samples - A randomly selected candidate from a set of candidates. NOTE that the same candidate may have been selected in duplicate.

type Rand ¶

type Rand struct {
	tmsync.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

Source Files ¶

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