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Re: my and local variable significance in a particular case

by GrandFather (Sage)
on Apr 24, 2012 at 05:38 UTC ( #966730=note: print w/replies, xml ) Need Help??

in reply to my and local variable significance in a particular case

Lexical variables are scoped to the current block (which may be the entire file and in the sample case) and must be declared using my. local, as you say, tucks away the previous value of something (it need not be a package variable btw) and restores it when the current scope is exited.

I suspect you pretty much already knew that. Maybe the missing piece is that you should generally use my (lexical variables) unless you need the extra behaviour that local provides. local doesn't give the scoping protection that a lexical variable does and it incurs some runtime overhead. Bottom line: if you want a variable that is scoped to the current block use a lexical variable.

True laziness is hard work
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[Corion]: Good morning ;)
[marto]: meh, that's the last time I reply to finddata, I don't see an improvement in attitude or approach
Discipulus there are none so deaf as those who will not hear..
Discipulus who do not want to ear
[Corion]: marto: No, I haven't seen anything either and I'm not sure if learning-by- osmosis will work here
[marto]: I've experienced the behavior LanX described, outsourcing really opens your eyes to the situation :)

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