JS Regular Expression to match function params from string

Question

I have a string like this: matrix(10, 0, 1, 0, -198, 23)

Then I need to match the arguments from that function and put in array:

var regexp = /.../gi
var match = regexp.exe('matrix(10, 0, 1, 0, -198, 23)');

console.debug(match) // must return: [10, 0, 1, 0, -198, 23]

I'm not very familiar with regular expression, but I think will be the fastest way to do the job.

split string is not possible in this case.

Performance test for the awnsers: http://jsperf.com/regexp-match-vs-string-split

What have you tried?

sczizzo
– sczizzo

2012-06-14 19:41:49 +00:00
Commented Jun 14, 2012 at 19:41 — sczizzo
– sczizzo, Commented Jun 14, 2012 at 19:41
lot's of fail regular expressions....

Gabriel Gartz
– Gabriel Gartz

2012-06-14 19:42:52 +00:00
Commented Jun 14, 2012 at 19:42 — Gabriel Gartz
– Gabriel Gartz, Commented Jun 14, 2012 at 19:42
/[\+\-\d\s,]+/.exec( str ) ?

Larry Battle
– Larry Battle

2012-06-14 19:44:36 +00:00
Commented Jun 14, 2012 at 19:44 — Larry Battle
– Larry Battle, Commented Jun 14, 2012 at 19:44
Or you searching for a str or do you just want the numbers?

Larry Battle
– Larry Battle

2012-06-14 19:48:36 +00:00
Commented Jun 14, 2012 at 19:48 — Larry Battle
– Larry Battle, Commented Jun 14, 2012 at 19:48

akjoshi · Accepted Answer · 2012-06-22 07:23:44Z

5

'matrix(10, 0, 1, 0, -198, 23)'.match(/-?\d+/g)

edited Jun 22, 2012 at 7:23

akjoshi

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answered Jun 14, 2012 at 19:46

KalEl

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1 Comment

Gabriel Gartz Over a year ago

Sorry, but it fail, -198 has returned 198

Ryan Kinal · Accepted Answer · 2012-06-14 20:46:32Z

1

Three steps:

Use regex to get contents of parens
replace the parens themselves and with nothing
split on comma followed by 0 or more white space

var str = 'matrix(10, 0, 1, 0, -198, 23)',
    regex = /\(.*\)/,
    arr;

str = str.match(regex)[0];
str = str.replace(/[()]/g, '');
arr = str.split(/,\s+/);

console.log(arr);

edited Jun 14, 2012 at 20:46

answered Jun 14, 2012 at 19:51

Ryan Kinal

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4 Comments

Gabriel Gartz Over a year ago

it's not working... the first match returns null and the split don't exist on javascript as default...

Gabriel Gartz Over a year ago

SyntaxError: Unexpected token ILLEGAL

Gabriel Gartz Over a year ago

As I said in the question, split string isn't possible in this case. But your code work, the performance is poor, test for your self: jsperf.com/regexp-match-vs-string-split

Ryan Kinal Over a year ago

In Chrome, at least, the performance of my solution is approximately equal to the accepted one. In addition, it's a general solution that doesn't just capture integer arguments. It will capture all arguments.

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