Overview

In GO string are UTF-8 encoded. strings package of GO provides a ReplaceAll method that can be used to replace all non-overlapping instances of a given substring with a new substring. It returns a copy of the string

Below is the signature of the function. The function will replace all non-overlapping instances of old with new in string s. If old is empty then it inserts new between it each valid UTF-8 sequence of bytes in the string s.

func ReplaceAll(s, old, new string) string

Let’s look at the working code

Code:

package main

import (
    "fmt"
    "strings"
)

func main() {
    res := strings.ReplaceAll("abcdabxyabr", "ab", "12")
    fmt.Println(res)
    
    res = strings.ReplaceAll("abcdabxyabr", "", "12")
    fmt.Println(res)
}

Output

12cd12xy12r
12a12b12c12d12a12b12x12y12a12b12r12