Re^2: Questions concerning /o regex modifier

diotalevi,
Ok, but I am still don't understand when and why /o is useful. Would you be kind enough to fill in the blanks?

Cheers - L~R

Comment on Re^2: Questions concerning /o regex modifier

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Re^3: Questions concerning /o regex modifier by diotalevi (Canon) on Nov 29, 2006 at 21:30 UTC
Use /o when writing for a perl 5.005 and less. You are nano-optimizing to avoid the null operation of a pp_regcomp given a qr// object Use qr// when writing for a perl 5.6 and greater. You want the syntax affordance of being able to say `qr/\s/` rather than `"\\s"` (assuming your interpolating into some larger expression) Rely on /$regex/ implementation details when you've bothered to read the source and know exactly what it's doing Do not use /o when writing for humans to read (because almost no one understands what /o does) on perls 5.6 and greater ever. It's just bad style now. Do not use qr// when on perl 5.005 and lower you're writing a sub expression that's going to be interpolated elsewhere and you care that the regexp compiler takes longer to compile strings like '(?-xism:...)' slower than '...'. Do not rely on /$regex/ implementation details when you haven't read the source to pp_regcomp. ⠤⠤ ⠙⠊⠕⠞⠁⠇⠑⠧⠊	[reply] [d/l] [select]
Re^4: Questions concerning /o regex modifier by Limbic~Region (Chancellor) on Nov 29, 2006 at 21:49 UTC
diotalevi, Thank you! I will point people to this anytime the discussion comes up. Cheers - L~R	[reply]