Combine JavaScript regex's into one

Question

I would like to combine these JavaScript regex's into a single regex. How can I do this? I have tried using the '|' operator in-between strings, but this does not work.

var r1 = new RegExp(id + '\\s*===\\s*TRUE', 'gm');
var r2 = new RegExp(id + '\\s*===\\s*true', 'gm');
var r3 = new RegExp(id + '\\s*===\\s*FALSE', 'gm');
var r4 = new RegExp(id + '\\s*===\\s*false', 'gm');
var r5 = new RegExp(id + '\\s*!==\\s*TRUE', 'gm');
var r6 = new RegExp(id + '\\s*!==\\s*true', 'gm');
var r7 = new RegExp(id + '\\s*!==\\s*FALSE', 'gm');
var r8 = new RegExp(id + '\\s*!==\\s*false', 'gm');

nhahtdh · Accepted Answer · 2013-01-26 06:53:22Z

1

Try this:

var r = new RegExp(id+"\\s*[!=]==\\s*(?:true|false)","gi");

I removed the m modifier, since it doesn't apply here, and added the i modifier to take care of all case options.

edited Jan 26, 2013 at 6:53

nhahtdh

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answered Jan 26, 2013 at 5:21

Niet the Dark Absol

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2 Comments

Jen Zhang Over a year ago

How come you remove the extra escape on the "\s". When I use your regex I no longer match strings like "DEF === TRUE". Is there something I don't know here?

nhahtdh Over a year ago

@Kolink: I edited your answer to include an escape to the ``.

Christophe Biocca · Accepted Answer · 2013-01-26 05:22:32Z

0

In this specific case

new RegExp(id + '\\s*[!=]==\\s*(?:TRUE|true|false|FALSE)', 'gm')

should do the trick.

In the general case, joining the strings with '|' should work.

@Kolink's answer is better if you also want to accept 'fAlSe' and similar strings.

answered Jan 26, 2013 at 5:22

Christophe Biocca

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