如何将字符串分配给字节数组

Question

I want to assign string to bytes array:

var arr [20]byte
str := "abc"
for k, v := range []byte(str) {
  arr[k] = byte(v)
}

Have another method?

Answer 1

For example,

package main

import "fmt"

func main() {
    s := "abc"
    var a [20]byte
    copy(a[:], s)
    fmt.Println("s:", []byte(s), "a:", a)
}

Output:

s: [97 98 99] a: [97 98 99 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0]