Golang : Break string into a slice of characters example

Problem:

You want to convert a string into a slice/array of individual characters. It is similar to breaking down a string into slice/array example with strings.Fields() function. but instead of words, you want to break into single characters. How to do that?

Solution:

Use for loop range to break the string into characters and then use text/Scanner.TokenString() function to return a printable string for a token or Unicode character.

Here you go!

 package main

 import (
 "fmt"
 "text/scanner"
 )

 func breakToCharSlice(str string) []string {

 tokens := []rune(str)

 var result []string

 for _, char := range tokens {
 result = append(result, scanner.TokenString(char))
 }

 return result
 }

 func main() {
 str := "Ace of Hearts"

 temp := breakToCharSlice(str)

 for k, v := range temp {
 fmt.Println(k, v)
 }

 unicodestr := "α제ちمرحباהיי"

 temp = breakToCharSlice(unicodestr)

 for k, v := range temp {
 fmt.Println(k, v)
 }

 }

Output:

0 "A"

1 "c"

2 "e"

3 " "

4 "o"

5 "f"

6 " "

7 "H"

8 "e"

9 "a"

10 "r"

11 "t"

12 "s"

0 "α"

1 "제"

2 "ち"

3 "م"

4 "ر"

5 "ح"

6 "ب"

7 "ا"

8 "ה"

9 "י"

10 "י"