Re^5: Regex for matching n-fold repititions of arbitrary characters

/pat/g means /(pat)/g if pat contains no captures. In list context, m// returns what it captured (or 1 if there are no captures) on success.

$ perl -wle'print for "aabbaab" =~ /((.)\2+)/sg;'
aa
a
bb
b
aa
a
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$ perl -wle'print $1 while "aabbaab" =~ /((.)\2+)/sg;'
aa
bb
aa
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Note that if "aabbaab" =~ /aa|bb/g is wrong. Red flags should be raised when you see /g in scalar context outside a loop.

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Re^6: Regex for matching n-fold repititions of arbitrary characters by LanX (Saint) on Oct 08, 2009 at 21:39 UTC
Note that if "aabbaab" =~ /aa\|bb/g is wrong. Red flags should be raised when you see /g in scalar context outside a loop. Not necessarily! It makes sense when parsing with nested ifs! Friedl's book has some nifty examples... Cheers Rolf	[reply]
Re^7: Regex for matching n-fold repititions of arbitrary characters by ikegami (Patriarch) on Oct 09, 2009 at 02:19 UTC
I didn't say m//g in scalar context outside a loop is wrong. I said it's usually wrong. I said the code he used was wrong. And I bet his tokenizers used /c too	[reply]