Split string using RegExp?

Question

I am new to JavaScript. I have a variable:

var externalClientDataBody = {"hotelCodes":"CUNMXSAKU_3d,CUNMXMAYA_4d"};

I want to split it on delimeter "_". I want my output to look like this:

var externalClientDataBody = {"hotelCodes":"CUNMXSAKU,CUNMXMAYA"};

I can ignore "_3d _4d" and want to get my string comma separated like "CUNMXSAKU,CUNMXMAYA". Is there any way to do this using RegExp?

Are there always just two things in the list, or could it be more? — Anders
– Anders, Commented Oct 2, 2015 at 14:55
You've said "split," but you're not doing any splitting in the above, you're just removing _3d and _4d from the one string. — T.J. Crowder
– T.J. Crowder, Commented Oct 2, 2015 at 14:56
You can also use 'CUNMXSAKU_3d'.match(/([^_]+)/)[1] to extract all the characters before _. — Tushar
– Tushar, Commented Oct 2, 2015 at 18:48

T.J. Crowder · Accepted Answer · 2015-10-02 15:05:59Z

4

If your goal is to remove the _ and anything following it through the end of the word, you can do it by matching _ followed by "word" characters (\w) and replacing with "":

str = str.replace(/_\w+/g, '');

Live Example:

var externalClientDataBody = {"hotelCodes":"CUNMXSAKU_3d,CUNMXMAYA_4d"};
externalClientDataBody.hotelCodes = externalClientDataBody.hotelCodes.replace(/_\w+/g, '');
snippet.log(externalClientDataBody.hotelCodes);

<!-- Script provides the `snippet` object, see http://meta.stackexchange.com/a/242144/134069 -->
<script src="//tjcrowder.github.io/simple-snippets-console/snippet.js"></script>

edited Oct 2, 2015 at 15:05

answered Oct 2, 2015 at 14:56

T.J. Crowder

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Comments

x13 · Accepted Answer · 2015-10-02 15:05:03Z

0

This should do the trick:

var regex = new RegExp('(^[^_]+)')
var input = 'dasddffsdff_d3';
var result = regex.exec(input);
//result = 'dasddffsdff'

RegExr link

edited Oct 2, 2015 at 15:05

answered Oct 2, 2015 at 15:00

x13

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3 Comments

T.J. Crowder Over a year ago

Result will not be as shown with the above. It will be an array with two entries, ["dasddffsdff", "dasddffsdff"].

x13 Over a year ago

@T.J.Crowder I thought you would use it in a loop.

T.J. Crowder Over a year ago

If you're going to say "result =" it should be correct. Moreover, .exec is the wrong tool for this job.

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