Golang編程實現(xiàn)生成n個從a到b不重復隨機數(shù)的方法

package test
import (
    "fmt"
    "math/rand"
    "time"
)
//生成若干個不重復的隨機數(shù)
func RandomTestBase() {
    //測試5次
    for i := 0; i 5; i++ {
        nums := generateRandomNumber(10, 30, 10)
        fmt.Println(nums)
    }
}
//生成count個[start,end)結(jié)束的不重復的隨機數(shù)
func generateRandomNumber(start int, end int, count int) []int {
    //范圍檢查
    if end start || (end-start) count {
        return nil
    }
    //存放結(jié)果的slice
    nums := make([]int, 0)
    //隨機數(shù)生成器，加入時間戳保證每次生成的隨機數(shù)不一樣
    r := rand.New(rand.NewSource(time.Now().UnixNano()))
    for len(nums) count {
        //生成隨機數(shù)
        num := r.Intn((end - start)) + start
        //查重
        exist := false
        for _, v := range nums {
            if v == num {
                exist = true
                break
            }
        }
        if !exist {
            nums = append(nums, num)
        }
    }
    return nums
}

[12 20 18 19 21 28 15 13 11 10]
[28 15 12 10 20 18 16 24 27 17]
[25 28 29 19 21 12 16 13 11 15]
[27 20 19 23 18 13 21 24 12 26]
[19 10 27 18 28 12 22 14 16 26]