str

func B ¶

func B(n int) []byte

B retrieves and returns random bytes of given length `n`.

func D ¶

func D(min, max time.Duration) time.Duration

D returns a random time.Duration between min and max: [min, max].

func Digits ¶

func Digits(n int) string

Digits returns a random str which contains only digits, and its length is `n`.

func Intn ¶

func Intn(max int) int

func Letters ¶

func Letters(n int) string

Letters returns a random str which contains only letters, and its length is `n`.

func Meet ¶

func Meet(num, total int) bool

Meet randomly calculate whether the given probability `num`/`total` is met.

func MeetProb ¶

func MeetProb(prob float32) bool

MeetProb randomly calculate whether the given probability is met.

func N ¶

func N(min, max int) int

N returns a random int between min and max: [min, max]. The `min` and `max` also support negative numbers.

func PadLeftZeros ¶

func PadLeftZeros(str string, length int) string

PadLeftZeros 前置补零

func Perm ¶

func Perm(n int) []int

Perm returns, as a slice of n int numbers, a pseudo-random permutation of the integers [0,n). TODO performance improving for large slice producing.

func S ¶

func S(n int, symbols ...bool) string

S returns a random str which contains digits and letters, and its length is `n`. The optional parameter `symbols` specifies whether the result could contain symbols, which is false in default.

func Str ¶

func Str(s string, n int) string

Str randomly picks and returns `n` count of chars from given str `s`. It also supports unicode str like Chinese/Russian/Japanese, etc.

func Symbols ¶

func Symbols(n int) string

Symbols returns a random str which contains only symbols, and its length is `n`.