在字符串后面附加一个字节？

Question

How do you append a byte to a string in Go?

var ret string
var b byte
ret += b

invalid operation: ret += b (mismatched types string and byte)

Answer 1

In addition to ThunderCats answer.. you could initialize a bytes.Buffer from a string ... allowing you to continue appending bytes as you see fit:

buff := bytes.NewBufferString(ret)

// maybe buff.Grow(n) .. if you hit perf issues?

buff.WriteByte(b)
buff.WriteByte(b)

// ...

result := buff.String()