Javascript Regex, finding numbers in a string

Question

Sorry this is so specific but I couldn't figure it out from any of the examples I've seen or other questions. I need to find all positive or negative numbers with decimals of any precision in a string. examples: -0.2, .2, 3.4, -3.4, 3.400, 300.5 etc. They must have decimals, no digits and no commas. Any help would be greatly appreciated, I think it should be simple but I'm not getting anywhere.

I'm drawing a blank but nothing like 5, -1, 100

nschamb1
– nschamb1

2012-09-03 02:16:39 +00:00
Commented Sep 3, 2012 at 2:16 — nschamb1
– nschamb1, Commented Sep 3, 2012 at 2:16

Austin Greco · Accepted Answer · 2012-09-03 02:19:30Z

1

try this:

/\-?\d*\.\d+/

It will still work for -.2 not sure if you want that.

\-?        - or no -
\d*        0 or more digits
\.         .
\d+        1 or more digits

Also if you're sure the entire string will be the value with no other characters, then you should add ^ and $

/^\-?\d*\.\d+$/ would not match something like 'hello1.2' whereas without ^ and $ it would match.

edited Sep 3, 2012 at 2:19

answered Sep 3, 2012 at 2:13

Austin Greco

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1 Comment

DavidRR Over a year ago

@nschamb1, Since the answer agreco provided worked for you, you should accept his answer and possibly upvote it as well! Also see When should I vote? and How does "Reputation" work?.

oyss · Accepted Answer · 2012-09-03 02:28:40Z

0

try this one,I just test it in regex coach,fits your example:

"[^\d]\.\d+|[-|\d+|-\d+]\d*\.\d+|\.d+"

answered Sep 3, 2012 at 2:28

oyss

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