What's the regex values for to match a string against all special characters and letters except a ma.

value = "23,$%aA";

I want to do a match if the value has any pf the special characters and letters like the above string then it will return true but if it just has a value like

value = "23,3456.00"

then it will return false. As all the special characters and letters are no longer part of the string.

Can I do this using match and regex.

What's the regex values for to match a string against all special characters and letters except a ma.

value = "23,$%aA";

I want to do a match if the value has any pf the special characters and letters like the above string then it will return true but if it just has a value like

value = "23,3456.00"

then it will return false. As all the special characters and letters are no longer part of the string.

Can I do this using match and regex.

• javascript
• regex

• 1 For your example of returning false, you have three "types" of characters: digits, a ma, and a period. Are those how you define "letters"? – nickb Commented May 1, 2013 at 21:21
• Have seen?: What regex will match every character except ma or semi-colon – Luigi Siri Commented May 1, 2013 at 21:23
• He wants to keep numbers too though – Ding Commented May 1, 2013 at 21:24

2 Answers 2

This will match everything that is not numeric or not a ma or period (decimal point)

var result = str.replace(/[^0-9\.,]/g, "");

var check = yourString.match(/[^0-9,\.]/);

Here check will be 'null' if the string does not contain a character different to a number, a ma or a point. If the string has any of these characters, check will be an Array. You could test this in this way

if (check === null ) { console.log('No special characters present') };

if (typeof check === 'Array' ) { console.log('Special characters present') };