Overview

In Golang string are UTF-8 encoded. strings package of GO provides a Split method that can be used to split a string by a separator.

Below is the signature of the function:

func Split(s, sep string) []string

As you can notice the return value of the Split function is a slice of string. Let’s notice some points about this method

• Case 1: The Split method slices the s into substrings which are separated by sep. It will return a slice of string

• Case 2: If s doesn’t contain sep then a slice of string of length 1 is returned. The only element of this slice will be s.

• Case 3: If sep is empty and then it will return a slice of string after splitting s into each UTF-8 sequence

• Case 4: If both s and sep are empty it will return an empty slice of string

Code

package main
import (
"fmt"
"strings"
)
func main() {
//Case 1 s contains sep. Will output slice of length 3
res := strings.Split("ab$cd$ef", "$")
fmt.Println(res)
//Case 2 s doesn't contain sep. Will output slice of length 1
res = strings.Split("ab$cd$ef", "-")
fmt.Println(res)
//Case 3 sep is empty. Will output slice of length 8
res = strings.Split("ab$cd$ef", "")
fmt.Println(res)
//Case 4 both s and sep are empty. Will output empty slice
res = strings.Split("", "")
fmt.Println(res)
}

Output:

[ab cd ef]
[ab$cd$ef]
[a b $ c d $ e f]
[]