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!!

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!!

• javascript
• regex
• string

• string.replace(/[^\w\s]/g, '') – Scott Sauyet Commented Jun 13, 2015 at 23:28
• you want write just numbers in text and or numbers and letters only? or after they write you remove them? – Mohammed Moustafa Commented Jun 13, 2015 at 23:28
• numbers and letters only @MohammedMoustafa – user4002542 Commented Jun 13, 2015 at 23:33

3 Answers 3

You can use a regex like this:

[\W_]+

The idea is to match with \W a non word character (those characters that are not A-Z, a-z, 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, ' ');

Yes that's possible using regular expressions

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

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
]