Matching a string using a javascript regex

Question

I have the following string:

name=cvbb&source=Mamma+Mia&startdate=2014-03-24

The following regex matches till startdate

(source=.*(startdate))

How do I match the string till the '&' after Mia?

UPDATE:

name=cvbb&source=Mamma+Mia&startdate=2014-03-24&date=2014-04-24

I want the match to occur until the occurrence of the & right after Mia

For you information regular expressions engines are usually greedy - meaning they try to match as much as they can according to the regex. This is the reason the & is matched as well. — Ikaso, Apr 17 '14 at 05:34
@Paulie what does `the string till the '&' after Mia` look like? Please provide the portion of the string you want to get. — SoAwesomeMan, Apr 17 '14 at 06:30
@Paulie Is this what you're trying to get? ➔ `name=cvbb&source=Mamma+Mia` — SoAwesomeMan, Apr 17 '14 at 06:42

score 1 · Answer 1 · edited May 23 '17 at 12:20

Since you are planning to parse the data later, I would recommend getting a key-value pair data, like this

var data = "name=cvbb&source=Mamma+Mia&startdate=2014-03-24";
console.log(data.split("&").reduce(function(result, currentItem) {
    var splitted = currentItem.split("=");
    result[splitted[0]] = splitted[1];
    return result;
}, {}));

Output

{ name: 'cvbb', source: 'Mamma+Mia', startdate: '2014-03-24' }

If you want to ignore startdate alone, then you can include a condition like this

    var splitted = currentItem.split("=");
    if (splitted[0] !== "startdate") {
        result[splitted[0]] = splitted[1];
    }
    return result;

Then the result will be

{ name: 'cvbb', source: 'Mamma+Mia' }

score 0 · Answer 2 · answered Apr 17 '14 at 05:24

0

"name=cvbb&source=Mamma+Mia&startdate=2014-03-24".match(/source=([^&]+)/)[1]

answered Apr 17 '14 at 05:24

Miraage

3,334
3
26
43

score 0 · Accepted Answer · answered Apr 17 '14 at 05:25

0

Assuming these things are always in the same order, (name=.*&) ought to do it.

answered Apr 17 '14 at 05:25

Helpful

702
4
16

If you don't want to include the &, then use `(name=[^&]*)`. – Helpful Apr 17 '14 at 06:09
how can i further exclude name from the match? So as to just match cvbb? – Anon Apr 22 '14 at 01:28
/[^name]*=[^&]*/ matches =cvbb. How to I exclude = from the match? – Anon Apr 22 '14 at 01:49
As in, you don't want the "=" in the returned text, or the string no longer includes an "=" and is therefore failing to match? – Helpful Apr 22 '14 at 02:05
I don't want = in the returned text. – Anon Apr 22 '14 at 02:10
Try this: `(?<=name=)[^&]*` – Helpful Apr 22 '14 at 02:18
that gives a null match – Anon Apr 22 '14 at 03:03
Try this: `'name=cvbb&source=Mamma+Mia&startdate=2014-03-24'.split('').reverse().join('').match(/[^&]*(?==eman)/);` You'll have to reverse the output text, though - done by `"string".split('').reverse().join('')`. – Helpful Apr 22 '14 at 05:24
could i just strip the '=' after matching with the regex? res = res.replace('=',''); after executing the regex isn't eliminating the '=' character – Anon Apr 22 '14 at 08:35
Well, since the `=` is always first, you could just do something like: var x="string"; x=substring(1,x.length-1); – Helpful Apr 22 '14 at 08:56
The = seems to be creating a conflict here so that isn't working – Anon Apr 22 '14 at 09:03

score 0 · Answer 4 · 2014-04-17T11:16:12.957

0

Use the regexp /.*&/ will match till the last &.

Updated regexp:

/name=.*&source=[^&]*/

will give name=cvbb&source=Mamma+Mia if the string begins with name and source follows after it.

edited Apr 17 '14 at 11:16

answered Apr 17 '14 at 05:34

score 0 · Answer 5 · edited May 23 '17 at 10:26

javascript object

Javascript:

See live demo: FIDDLE

function params_match(string) {
    var rx = /([^=]+)=([^&]+)&?/g;
    var matches = {};
    var match;
    while (match = rx.exec(string)) {
        matches[match[1]] = match[2];
    }
    return matches;
}

var st = 'name=cvbb&source=Mamma+Mia&startdate=2014-03-24';
var obj = params_match(st);
//{name: "cvbb", source: "Mamma+Mia", startdate: "2014-03-24"}

Inspired by this answer: https://stackoverflow.com/a/14210948/1076207

Regex:

See here: http://rubular.com/r/E6Wuejs0bA

/([^=]+)=([^&]+)&?/

# Match 1
# 1.    name
# 2.    cvbb
#
# Match 2
# 1.    source
# 2.    Mamma+Mia
#
# Match 3
# 1.    startdate
# 2.    2014-03-24

Matching a string using a javascript regex

5 Answers5