Replacing part of the string

Another very common task related to string processing is the replacement of the substring in a string. Go standard library provide the Replace function and Replacer type for the replacement of multiple strings at once.

How to do it...

1. Open the console and create the folder chapter02/recipe06.
2. Navigate to the directory.
3. Create the replace.go file with the following content:

        package main

        import (
         "fmt"
         "strings"
        )

        const refString = "Mary had a little lamb"
        const refStringTwo = "lamb lamb lamb lamb"

        func main() {
          out := strings.Replace(refString, "lamb", "wolf", -1)
          fmt.Println(out)

          out = strings.Replace(refStringTwo, "lamb", "wolf", 2)
          fmt.Println(out)
        }

4. Run the code by executing go run replace.go.
5. See the output in the Terminal:

6. Create the replacer.go file with the following content:

        package main

        import (
          "fmt"
          "strings...