javascript RegExp doesn't filter numbers

Question

I got a problem with a javascript regex.

It doesn't stop numbers and "!" character while it should. It works for the others special characters, and of course I have debuged it to see if it really does the test, etc... and it does. It return true even if there is numbers in my String.

This is the RegExp :

new RegExp("^[^\\- ][A-Za-z\u00C00-\u017F\\- ]+"); // \u00C00-\u017F = À-S(latin)

It is to validate a first name in a form.

The problem is weird because I have exactly the same regex on the server side in java, and it works perfectly.

Thanks for your answers :)

@pimvdb: makes no difference. There's no ending anchor so it will almost always validate. — Firas Dib
– Firas Dib, Commented Aug 29, 2012 at 12:22

JohnB · Accepted Answer · 2012-08-29 12:22:15Z

6

You probably have some typo:

\u00C00-\u017F

C00 hex would be LARGER THAN 17F hex. But \u catches four characters only, see comment below.

answered Aug 29, 2012 at 12:22

JohnB

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3 Comments

pimvdb Over a year ago

+1 Good catch. The first four digits are bound to the \u but the 0 is not. So the range is really 0-\u017f which includes digits .

Emilie Over a year ago

It is not that. I have try without it and it is still the same problem.

Emilie Over a year ago

wow! It was that indeed. Rhaa, it was so stupid >< Thanks a lot !

jorgebg · Accepted Answer · 2012-08-29 12:25:52Z

0

You should escape (for the javascript string) the regex \u

new RegExp("^[^\\- ][A-Za-z\\u00C0-\\u017F\\- ]+");

Also, if you are trying to match agains accented letters the range is (regex) [\u00C0-\u00FF]

answered Aug 29, 2012 at 12:25

jorgebg

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3 Comments

Emilie Over a year ago

The problem doesn't come form the unicode range. I did it without them yesterday and the problem was already here.

JohnB Over a year ago

So you already had an error and made the code more complicated without fixing it before? Can you please show the statement where you do the test?

Emilie Over a year ago

It works no, with the unicode corrected. I gess there was another errors before which made the same problem.

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