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rated 0 times [ 4] [ 4] / answers: 1 / hits: 23940 / 12 Years ago, mon, october 8, 2012, 12:00:00

I am currently using str.indexOf(word) to find a word in a string.
But the problem is that it is also returning parts of other words.

Example: I went to the foobar and ordered foo.
I want the first index of the single word foo, not not the foo within foobar.

I can not search for foo because sometimes it might be followed by a full-stop or comma (any non-alphanumeric character).

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answered 12 Years ago oliverg · Accepted Answer

You'll have to use regex for this:

> 'I went to the foobar and ordered foo.'.indexOf('foo')

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> 'I went to the foobar and ordered foo.'.search(/bfoob/)

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/bfoob/ matches foo that is surrounded by word boundaries.

To match an arbitrary word, construct a RegExp object:

> var word = 'foo';

> var regex = new RegExp('\b' + word + '\b');

> 'I went to the foobar and ordered foo.'.search(regex);

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