String Matching Javascript

Question

I want to get the characters after @ symbol till a space character.

for eg. if my string is like hello @world. some gibberish.@stackoverflow. Then I want to get the characters 'world' and 'stackoverflow'.

Here is what I have been trying.

var comment = 'hello @world. some gibberish.@stackoverflow';
 var indices = [];
  for (var i = 0; i < comment.length; i++) {
        if (comment[i] === "@") {
            indices.push(i);
            for (var j = 0; j <= i; j++){
               startIndex.push(comment[j]); 
            }
        }
    }

I can get the occurences of @ and spaces and then trim that part to get my content but I'd like a better solution / suggestion for this, with without REGEX. Thanks in advance.

Why do you want a solution without regex? This is exactly what regex was made to do. — Daniel Diekmeier
– Daniel Diekmeier, Commented May 26, 2016 at 13:17
str.split('@').splice(1).map(function(w) { return w.split(' ')[0]; }) — haim770
– haim770, Commented May 26, 2016 at 13:18
stackoverflow.com/questions/15265605/…, npmjs.com/package/mentions-regex — Wiktor Stribiżew
– Wiktor Stribiżew, Commented May 26, 2016 at 13:21

anubhava · Accepted Answer · 2016-05-26 13:27:07Z

4

You can use this regex:

/@(\S+)/g

and grab captured groups using exec method in a loop.

This regex matches @ and then \S+ matches 1 or more non-space characters that are grouped in a captured group.

Code:

var re = /@(\S+)/g; 
var str = 'hello @world. some gibberish.@stackoverflow';
var m;
var matches=[];

while ((m = re.exec(str)) !== null) {
  matches.push(m[1]);
}

document.writeln("<pre>" + matches + "</pre>");

PS: Note you will need to use

/@([^.\s]+)/g

if you don't want to capture DOT after word.

edited May 26, 2016 at 13:27

answered May 26, 2016 at 13:17

anubhava

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1 Comment

Rishik Rohan Over a year ago

Thanks a lot! Worked perfectly fine. Also any good reference if you can recommend with plenty of examples for learning regex? Thanks in advance!

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