in reply to Re^3: Can we make $& better? (need)
in thread Can we make $& better?
Wow. There needs to be a cheat sheet for this because every time it comes up I find mistakes, in this case my own. So my previous discovery that capturing parens cause the entire string to be copied is mostly not true. I assume the copy is required for s/// and s///g. Testing shows that otherwise the copy only happens for m// on modern perls (the 'scalar context' part doesn't appear to matter in my current testing) and doesn't even happen then with 5.6.
It is nice that I can stop fearing the performance impact of capturing parens when doing the usual scalar-context m/.../gc of a parser. Thanks!
- tye
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Re^5: Can we make $& better? (need)
by demerphq (Chancellor) on Sep 12, 2007 at 19:24 UTC | |
by tye (Sage) on Sep 12, 2007 at 20:49 UTC |
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