Javascript Regex match any word that starts with '#' in a string

Question

I\'m very new at regex. I\'m trying to match any word that starts with \'#\' in a string that contains no newlines (content was already split at newlines).

Example (

Answer 1

var re = /(?:^|\W)#(\w+)(?!\w)/g, match, matches = [];
while (match = re.exec(s)) {
  matches.push(match[1]);
}

Check this demo.

Answer 2

You actually need to match the hash too. Right now you're looking for word characters that follow a position that is immediately followed by one of several characters that aren't word characters. This fails, for obvious reasons. Try this instead:

string.match(/(?=[\s*#])[\s*#]\w+/g)

Of course, the lookahead is redundant now, so you might as well remove it:

string.match(/(^|\s)#(\w+)/g).map(function(v){return v.trim().substring(1);})

This returns the desired: [ 'iPhone', 'delete' ]

Here is a demonstration: http://jsfiddle.net/w3cCU/1/

Answer 3

Try this:

var matches = string.match(/#\w+/g);