Remove all characters that are not letters or numbers in a String

Question

how can i remove all characters that are not letters or 'numbers'??

I have a string:

var string = 'This - is my 4 String, and i - want remove all characters 49494 that are not letters or "numbers"';

And i want transform into this:

var string = 'This is my 4 String and i want remove all characters 49494 that are not letters or numbers'

This is possible?

Thanks!!

Answer 1

You can use a regex like this:

[\W_]+

The idea is to match with \\W a non word character (those characters that are not AZ , az , 0-9 and _ ) and also add explicitly _ (since underscore is considered a word character)

Working demo

var str = 's - is my 4 String, and i - want remove all characters 49494 that are not letters or "numbers"';     
var result = str.replace(/[\W_]+/g, ' ');

Answer 2

The way I like to do it is using a RegEx. This will select all non -letters and non -numbers and replace them with nothing or deleting them:

string = string.replace(/[^\s\dA-Z]/gi, '').replace(/ +/g, ' ');

Explanantion:

[^  NOT any of there
  \s  space
  \d  digit
  A-Z letter
]

Answer 3

是的，可以使用正则表达式

string = string.replace(/[^a-z0-9]+|\s+/gmi, " ");