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Re: Reg Expression translation

by Albannach (Prior)
on Nov 14, 2003 at 19:54 UTC ( #307185=note: print w/replies, xml ) Need Help??

in reply to Reg Expression translation

Provided you do read perlre and the other fine references so that you have a basis for understanding, you might find YAPE::Regex::Explain (by our own japhy) to be of use.

perl -MYAPE::Regex::Explain -e "print YAPE::Regex::Explain->new(shift)->explain;" "^\s*$"


The regular expression: (?-imsx:^\s*$) matches as follows: NODE EXPLANATION ---------------------------------------------------------------------- (?-imsx: group, but do not capture (case-sensitive) (with ^ and $ matching normally) (with . not matching \n) (matching whitespace and # normally): ---------------------------------------------------------------------- ^ the beginning of the string ---------------------------------------------------------------------- \s* whitespace (\n, \r, \t, \f, and " ") (0 or more times (matching the most amount possible)) ---------------------------------------------------------------------- $ before an optional \n, and the end of the string ---------------------------------------------------------------------- ) end of grouping ----------------------------------------------------------------------

I'd like to be able to assign to an luser

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[hippo]: Can anybody suggest a scalar value of $x for which ($x && !length $x) is true?

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