为什么在Go中将字节切片的元素作为整数返回？

Question

On the go playground, this code

package main

import (
    "fmt"
)

var a = []byte{ 0xff, 0xaa, 0x66, 0x33, 0x00 }

func main() {
    for b := range a {
        fmt.Printf("%T
", b)
    }
}

prints

int
int
int
int
int

Why in the world wouldn't a slice of bytes give you bytes when you iterate through it (or at least uint8 or something)?

Here's the link to the playground: https://play.golang.org/p/V1uZZWWq-X.

Answer 1

for i := range thing sets i to indices into the thing (unlike Python or such). for i, b := range byteslice would put the index in i and byte in b, and for _, b := range byteslice would just put the byte in b.

The spec on for statements lays out all the different special cases related to range expressions (including strings, channels, and maps as well).