Golang-将int添加到字节数组的末尾

问题描述：

I am trying to add an int to the end of a byte array in Golang.
This is my current code:

nameLengthBytes := []byte{32, 32}
nameLength := len(name)

The nameLengthBytes creates 2 spaces, and what I'm looking for is a way to add the nameLength to the end of the nameLengthBytes.

Examples:
if name length is 7, I want the array to be: {32, 55}
If name length is 12, I want the array to be {49, 50}

The problem is that sometimes the name is shorter than 10 so I need to fill up with a leading zero.

我正在尝试在Golang的字节数组末尾添加一个整数。
这是我的当前代码： p>

  nameLengthBytes：= [] byte {32，32} 
nameLength：= len（name）
  code>  pre> 
 
    nameLengthBytes  strong>创建2个空格，我正在寻找一种将 nameLength  strong>添加到 nameLengthBytes  strong>末尾的方法 。   p> 
 
 
 示例： em> 
 
如果名称长度为7，我希望数组为：{32，55} 
 
如果名称长度为 12，我希望数组为{49，50}  p> 
 
 
问题是有时名称短于10，所以我需要用前导零填充。   p> 
  div>

答

You want a space-padded ascii representation of a number as bytes? fmt.Sprintf produces a string, which you can then convert to bytes.

Here's some code, or run it on the playground.

package main

import "fmt"

func main() {
    bs := []byte(fmt.Sprintf("%2d", 7))
    fmt.Println(bs)
}

Golang-将int添加到字节数组的末尾

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