Re^2: how to extract string by possible groupings?

thanks! this is really clear and easy to understand. although, what does the symbol ":?" mean? also..i didn't even know qr can prepare regex pattern.. I guess I'm too rusty in perl!!

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Re^3: how to extract string by possible groupings? by LanX (Saint) on Jun 03, 2014 at 02:37 UTC
> what does the symbol ":?" mean its `(?:...)` not `:?` see (like already mentioned) `perlre#Extended-Patterns` Cheers Rolf (addicted to the Perl Programming Language)	[reply] [d/l] [select]
Re^3: how to extract string by possible groupings? by Laurent_R (Canon) on Jun 03, 2014 at 06:49 UTC
(?:...) is used for non capturing parentheses. This is useful when you need to regroup a subpattern (for example for an alternation or a quantification), but are not interested in capturing the content in $1, $2, etc.	[reply]