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Re^3: Help with placing the matches of a regex into an Array

by JavaFan (Canon)
on Apr 28, 2012 at 20:47 UTC ( #967861=note: print w/replies, xml ) Need Help??

in reply to Re^2: Help with placing the matches of a regex into an Array
in thread Help with placing the matches of a regex into an Array

It depends on the data -- if the data is incorrectly formatted (a missing ' for instance), they may not do the same thing. And '.+?' has the tendency to be slower than '[^']+'. Usually, the more restrictive a pattern is, the faster: there's less opportunity to backtrack. There's much more commitment in '[^']+' then there is in '.+?': the former will always match two quotes in succession, and whatever is in between, regardless how the rest of the pattern looks like, but that's not the case with '.+?'; there's nothing stopping the .+? part to match quotes.

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Re^4: Help with placing the matches of a regex into an Array
by stevieb (Abbot) on Apr 28, 2012 at 20:57 UTC

    Thank you for your explanation. I'm still working on bettering my understanding of the look-ahead/backtrack aspects when working with Perl regexs. You've made it very clear to me here with this example.

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[marto]: hopefully next year I'll be in a position to go to Perly things in Europe :)
[Corion]: Maybe I'll use the Real Jekyll a bit to get a feel for how it actually works, and to get annoyed by it ;)
[Corion]: marto: That would be cool :) There is no kids care at Perly events unfortunately, so it's not entirely family friendly
[Corion]: I think I should define a set of (say) five projects through which I rotate from time to time, just to prevent myself from being bored/annoyed by the problems they get stuck in ;)
[marto]: Corion, not bringing the kids would make it ideal :P
[marto]: a suggestion, have one project in the list that isn't programming/perl related
[Corion]: marto: Yeah, things are more parent-friendly the way they are ;))
[marto]: some hardware/makey thing
[Corion]: marto: Ah, I'm currently drifting to that again, over"painting" (well with Inkscape) one of my photographs and thinking about vectorizing some other images ...
[marto]: Corion, yes something 'artistic', so that or some music. Even combine some things, build a musical instrument :)

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