Specific pattern matching in Regex in Javascript

Question

I want to use regex to match the string of the following format : (#sometext#)

In the sense ,whatever is there between (# and #) only should be matched. So, the text:

var s = "hello(%npm%)hi";
var res = s.split(/(\([^()]*\))/);
alert(res[0]);
o/p: hello(%npm%)hi

And

var s = "hello(#npm#)hi";
var res = s.split(/(\([^()]*\))/);
alert(res[0]);
o/p: hello
alert(res[1]);
o/p : (#npm#);

But the thing is , the regex /(\([^()]*\))/ is matching everything between () rather than extracting the string including (# .. #) like:

hello
(#npm#)
hi

You can do something like s.match(/\(#([^#]*)#\)/) if you don't need the parts outside the parentheses. (Why are you using .split()? If you really want to do that then maybe something like s.split(/(\(#|#\))/)?) — nnnnnn
– nnnnnn, Commented Jan 9, 2017 at 5:31

Mustofa Rizwan · Accepted Answer · 2017-01-09 06:17:18Z

2

By going in your way of fetching content, try this:

var s = "hello(%npm%)hi";
var res = s.split(/\(%(.*?)%\)/);
alert(res[1]);
//o/p: hello(%npm%)hi

var s = "hello(#npm#)hi";
    var res = s.split(/(\(#.*?#\))/);
console.log(res);
    

//hello, (#npm#), hi

From your comment, updated the second portion, you get your segments in res array:

[
  "hello",
  "(#npm#)",
  "hi"
]

edited Jan 9, 2017 at 6:17

answered Jan 9, 2017 at 5:39

Mustofa Rizwan

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1 Comment

user1400915 Over a year ago

I need the output as : hello, (#npm#), hi for the second example

user2630764 · Accepted Answer · 2017-01-09 06:14:07Z

1

The following pattern is going to give the required output:

var s = "hello(#&yu()#$@8#)hi";
var res = s.split(/(\(#.*#\))/);
console.log(res);

"." matches everything between (# and #)

answered Jan 9, 2017 at 6:14

user2630764

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Comments

Phil Poore · Accepted Answer · 2017-01-09 05:35:43Z

0

It depends if you have multiple matches per string.

// like this if there is only 1 match per text
var text = "some text #goes#";
var matches = text.match(/#([^#]+)#/);
console.log(matches[1]);


// like this if there is multiple matches per text
var text2 = "some text #goes# and #here# more";
var matches = text2.match(/#[^#]+#/g).map(function (e){
  // strip the extra #'s
  return e.match(/#([^#]+)#/)[1];
});

console.log(matches);

answered Jan 9, 2017 at 5:35

Phil Poore

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