random

Documentation

Index

• func RandStringHex(n int) (string, error)
• func RandStringNumber(n int) (string, error)
• type Choice
• type WeightRand
  • func NewWeightRand(data []Choice) WeightRand
  • func (wr WeightRand) Pick() interface{}

Functions

func RandStringHex

func RandStringHex(n int) (string, error)

Generate a random string for hexadecimal. Docker Id use this.

func RandStringNumber

func RandStringNumber(n int) (string, error)

RandStringNumber 创建指定位数的数字字符串; n < 18 , 常用于短信验证码等情况

Types

type Choice

type Choice struct {
	Item   interface{} // Item 元素
	Weight uint        // 权重值
}

Choice 选择项的结构

type WeightRand

type WeightRand struct {
	// contains filtered or unexported fields
}

WeightRand 加权随机

func NewWeightRand

func NewWeightRand(data []Choice) WeightRand

NewWeightRand 创建一个加权随机算法。 该算法使用将权重放入一个有序数组，然后从随机数，二分法去查找有效区间，得出结果

func (WeightRand) Pick

func (wr WeightRand) Pick() interface{}

Pick 选出随机数，此处利用二分查找的特点