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186

How to interpret this regular expression /[W_]/g

rated 0 times [ 188] [ 2] / answers: 1 / hits: 32598 / 9 Years ago, wed, february 10, 2016, 12:00:00

My code is:

var result2 = result.replace(/[W_]/g,).replace(,,).replace(.,);

The code works i get what i need done, but I don't understand how the regular expression /[W_]/g works, and I can't find any documentation that i understand.

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answered 9 Years ago danyelletyanah · Accepted Answer

/ ... /g It's a global regex. So it'll operate on multiple matches in the string.

[ ... ] This creates a character set. Basically it'll match any single character within the listed set of characters.

W_ This matches the inverse of word characters and underscores. Any non-word character.

Then you have a few one off replacements for comma and period. Honestly, if that's the complete code, /[W_,.]/g, omitting the two other replaces, would work just as well.