Golang : How to check if input string is a word?

Tags : golang check-word regexp-syntax

Problem :

I'm writing a parser and I need to determine if the user input is a word or something else? How to do that?

Solution :

Use the IsWordChar() function from syntax/regexp package. For example :

NOTE : This solution is for ASCII-only: the word characters are [A-Za-z0-9_].

 package main

 import (

 func main() {

  word1 := []rune("alpha")
  word2 := rune('吃') // no need for array if for single rune
  word3 := []rune("1234")
  word4 := []rune(" $#$^@#$ ")

  ok := syntax.IsWordChar(word1[0])

  fmt.Printf("%v is a word ? : %v \n", string(word1), ok)

  ok = syntax.IsWordChar(word2)

  fmt.Printf("%v is a word ? : %v \n", string(word2), ok)

  ok = syntax.IsWordChar(word3[0])

  fmt.Printf("%v is a word ? : %v \n", string(word3), ok)

  ok = syntax.IsWordChar(word4[0])

  fmt.Printf("%v is a word ? : %v \n", string(word4), ok)


Output :

alpha is a word ? : true

吃 is a word ? : false

1234 is a word ? : true

$#$^@#$ is a word ? : false

Reference :


  See also : Golang : How to tokenize source code with text/scanner package?

Tags : golang check-word regexp-syntax

By Adam Ng

IF you gain some knowledge or the information here solved your programming problem. Please consider donating to the less fortunate or some charities that you like. Apart from donation, planting trees, volunteering or reducing your carbon footprint will be great too.