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)
        }

1. Run the code by executing go run replace.go.
2. See the output in the Terminal:

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

        package main

        import (
          "fmt"
          "strings"
        )

        const refString = "Mary had a little lamb"

        func main() {
          replacer := strings.NewReplacer("lamb", "wolf", "Mary", "Jack")
          out := replacer.Replace(refString)
          fmt.Println(out)
        }

1. Run the code by executing go run replacer.go.
2. See the output in the Terminal:

1. Create the regexp.go file with the following content:

        package main

        import (
          "fmt"
          "regexp"
        )

        const refString = "Mary had a little lamb"

        func main() {
          regex := regexp.MustCompile("l[a-z]+")
          out := regex.ReplaceAllString(refString, "replacement")
          fmt.Println(out)
        }

1. Run the code by executing go run regexp.go.
2. See the output in the Terminal: