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Re^3: Need a regex..

by Neighbour (Friar)
on May 21, 2012 at 14:40 UTC ( #971634=note: print w/ replies, xml ) Need Help??


in reply to Re^2: Need a regex..
in thread Need a regex..

Edit: Lost the race to Re: Need a regex.., which is also slightly better :)
Try a more grouped approach:
/^([+]|[-])?[0-9]{0,3}(\.[0-9]{1,3})?$/
First the start of the line: ^
then an optional + or - sign, with the + enclosed in [] to avoid interpretation: ([+]|-)?
then 0-3 digits: [0-9]{0,3}
then an optional group of a period followed by 1-3 digits, with the period escaped in another way to avoid interpretation: (\.[0-9]{1,3})?
and finally the end of the line: $


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