//反转数组
sort.SliceStable(tmp, func(i, j int)bool{
    return true
})
//升序
sort.SliceStable(tmp, func(i, j int)bool{
    return tmp[i] < tmp[j]
})
//降序
sort.SliceStable(tmp, func(i, j int)bool{
    return tmp[i] > tmp[j]
})

举例：

package main

import (
    "fmt"
    "sort")

func main(){
    sliceStable([]int{4, 3, 10, 2, 8}, 1)
    sliceStable([]int{4, 3, 10, 2, 8}, 2)
    sliceStable([]int{4, 3, 10, 2, 8}, 3)
// [2 3 4 8 10]
// [10 8 4 3 2]
// [8 2 10 3 4]
}

func sliceStable(tmp []int, op int){
    if op == 1{
        //升序
        sort.SliceStable(tmp, func(i, j int)bool{
            return tmp[i] < tmp[j]
        })
    }else if op == 2{
        //降序
        sort.SliceStable(tmp, func(i, j int)bool{
            return tmp[i] > tmp[j]
        })
    }else if op == 3{
        //反转数组
        sort.SliceStable(tmp, func(i, j int)bool{
            return true
        })
    }
    fmt.Println(tmp)
}