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Re: Iterations in regex

by toolic (Bishop)
on May 12, 2014 at 15:44 UTC ( #1085811=note: print w/ replies, xml ) Need Help??

in reply to Iterations in regex

Don't use the last +

my @f = ($data =~ m!((\w+),+)!g);


The regular expression: (?-imsx:((\w+),+)+) 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): ---------------------------------------------------------------------- ( group and capture to \1 (1 or more times (matching the most amount possible)): ---------------------------------------------------------------------- ( group and capture to \2: ---------------------------------------------------------------------- \w+ word characters (a-z, A-Z, 0-9, _) (1 or more times (matching the most amount possible)) ---------------------------------------------------------------------- ) end of \2 ---------------------------------------------------------------------- ,+ ',' (1 or more times (matching the most amount possible)) ---------------------------------------------------------------------- )+ end of \1 (NOTE: because you are using a quantifier on this capture, only the LAST repetition of the captured pattern will be stored in \1) ---------------------------------------------------------------------- ) end of grouping ----------------------------------------------------------------------

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