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Re: Regex to match 20 chars of some digits followed by some spacesby Chmrr (Vicar) |
on Dec 19, 2003 at 14:21 UTC ( [id://315798]=note: print w/replies, xml ) | Need Help?? |
Yet another way to do it: /^\d+ *(?<=^.{20})$/ That is, one or more digits, followed by zero or more spaces -- and only thereafter do we check that it summed to 20 characters total. Probably not as efficient (involves more backtracking) but easier for my eyes to understand.
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