Overflow style

package main

import (
	"fmt"
	"bytes"
)

func main() {
	subStrings := bytes.Split([]byte("a,b"), []byte(","))
	fmt.Println(string(subStrings[0]))
	fmt.Println(string(subStrings[1]))
	subStrings[0] = append(subStrings[0], 'a', 'a')
	fmt.Println(string(subStrings[0]))
	fmt.Println(string(subStrings[1]))
}
a
b
aaa
a