Golang : Convert(cast) string to rune and back to string example



Tags : golang convert type-cast rune string

Tutorial on how how to convert a string to rune type and back to string. Dealing with rune can be confusing sometimes because single quotes and double quotes can have different meaning in Golang. This example code below is pretty straightforward and ... is self explanatory.

Here you go!

 package main

 import (
  "fmt"
  "regexp/syntax"
 )

 func main() {

  str := []rune("beta")  // use rune slice
  acharacter := rune('a') // use single quote, instead of double quote
  onerune := rune('吃')

  fmt.Printf("%v \n", string(str)) // convert back to string

  fmt.Printf("%v \n", string(acharacter)) // convert back to string

  fmt.Printf("%v \n", string(onerune)) // convert back to string
  
  // there are times when accessing str is not acceptable because
  // it is a slice. Therefore, you just have to reference the first
  // element
  
  // for example :
  
  ok := syntax.IsWordChar(str[0]) // won't work without [0]

 fmt.Printf("%v is a word ? : %v \n", string(str), ok)


 }

Output :

beta

a

beta is a word ? : true

  See also : Golang : convert rune to integer value



Tags : golang convert type-cast rune string

By Adam Ng

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