Regular expression for certain numbers

Question

I want to generate a regular expression for the following situation.

I did like this: /[0-9]{3}\.[0-9]{2}$/, but it satisfied only point number 1.

score 3 · Answer 1 · answered Dec 11 '13 at 10:30

3

Try this:

^[0-9]{1,3}(\.[0-9]{1,2})?$

answered Dec 11 '13 at 10:30

Andrew

2

or `\d` instead of `[0-9]` – georg Dec 11 '13 at 10:32
proves that it works: http://jsfiddle.net/8WZkf/1/ – Jay Dec 11 '13 at 10:38
see jzelenkov 's jsfiddle, and tell how it not works? – Andrew Dec 11 '13 at 10:41
@Andrew one important thing you should learn is to do negative tests. Testing all the positives is nice, but won't ensure, that the regex does exactly what it is intended to... – Christoph Dec 11 '13 at 10:43
@Christoph, you mean leading zeros? – Andrew Dec 11 '13 at 10:47
No, I mean something like this: http://jsfiddle.net/8WZkf/6/ – Christoph Dec 11 '13 at 10:50
ya..its working...actually i tried with match() function.. – bappa147 Dec 11 '13 at 11:16
@thg435: `\d` is not the same than `[0-9]`, it depends on locale, see: http://stackoverflow.com/a/891741/372239 – Toto Dec 11 '13 at 15:13
@M42: this is true for Perl and other unicode-aware regex engines. In javascript `\d` is defined as 0-9. – georg Dec 11 '13 at 16:55
@thg435: Ok, I wasn't aware of that. – Toto Dec 11 '13 at 18:41

1 Answers1