如何在进行中反转切片？

How do I reverse an arbitrary slice ([]interface{}) in Go? I'd rather not have to write Less and Swap to use sort.Reverse. Is there a simple, builtin way to do this?

There is not a simple, built-in for reversing a slice of interface{}. You can write a for loop to do it:

for i, j := 0, len(s)-1; i < j; i, j = i+1, j-1 {
    s[i], s[j] = s[j], s[i]
}

The reflect.Swapper function introduced in Go 1.8 can be used to write a generic reversing function:

func reverseAny(s interface{}) {
    n := reflect.ValueOf(s).Len()
    swap := reflect.Swapper(s)
    for i, j := 0, n-1; i < j; i, j = i+1, j-1 {
        swap(i, j)
    }
}

playground example

There are my code example, you can run it in playground

package main

import (
    "fmt"
    "reflect"
    "errors"
)

func ReverseSlice(data interface{}) {
    value := reflect.ValueOf(data)
    if value.Kind() != reflect.Slice {
        panic(errors.New("data must be a slice type"))
    }
    valueLen := value.Len()
    for i := 0; i <= int((valueLen-1)/2); i++ {
        reverseIndex := valueLen - 1 - i
        tmp := value.Index(reverseIndex).Interface()
        value.Index(reverseIndex).Set(value.Index(i))
        value.Index(i).Set(reflect.ValueOf(tmp))
    }
}


func main() {
    names := []string{"bob", "mary", "sally", "michael"}
    ReverseSlice(names)
    fmt.Println(names)
}