Javascript match and extract $ symbol from a string?

Question

Currently I have:

var price = \'$4000\';
var currency = price.match([\\$]);
alert(currency);

However this doesn\'t seem to work. I would like t

Answer 1

If you want to find the dollar sign in any position use:

var currency = price.match(/\$/);

If you want to find the dollar sign at the beginning of the string use:

var currency = price.match(/^\$/);

Here's the documentation about Javascript RegExp

Answer 2

Put your regular expression inside // or quotes:

var price = '$4000';
var currency = price.match(/[\$]/);
alert(currency);

Answer 3

Some people, when confronted with a problem, think "I know, I'll use regular expressions." Now they have two problems. (c) Jamie Zawinski

I agree that RegEx is more concise but you could do with just '$4000'.indexOf('$'). Like this:

if (price.indexOf('$')>-1) { currency = '$' }

Answer 4

This should work: '$4000'.match(/^\$/).

(It looks for the $ sign at the beginning of the string)

The javascript syntax for regular expression literal uses / at the beginning and at the end of the expression.