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Re^2: How will you use state declared variables in Perl6?

by Anonymous Monk
on Jul 08, 2005 at 21:15 UTC ( #473568=note: print w/replies, xml ) Need Help??

in reply to Re: How will you use state declared variables in Perl6?
in thread How will you use state declared variables in Perl6?

Effectively, %seen becomes a Class variable

Not so! A class variable is accessible to all instances of a class. A state variable (assuming it behaves more or less exactly like a static variable in C/C++) is visible only within the declaring function, and if that function is a method, then it is restricted to the instance as well. It's actually a tighter scope than member variables with the same persistence.

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Re^3: How will you use state declared variables in Perl6?
by BrowserUk (Pope) on Jul 08, 2005 at 21:25 UTC

    The scope is constrainted to the method, but the potential to affect change to it is not!

    Any instance that can call the method can change it's value. Any method in the same class can call the method, therefore any instance of the class can call the method, and unless it is somehow constrained, any instance of any subclass can call a method that will call a that method and so change it's state.

    Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
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    "Science is about questioning the status quo. Questioning authority".
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[Corion]: "flag problem" to me sounds like "contains UTF-8 bytes but was never properly decoded to an UTF-8 string"
[LanX]: not my code ...
[choroba]: yeah, sounds like one of the strings is not flagged as UTF-8
[choroba]: which usually means its input wasn't handled correctly
[Corion]: choroba: Yeah, I think that would be the good solution
[LanX]: I suspect the first string which comes from the DB ...
[LanX]: ... but this part is already in production for a year now
[Corion]: LanX: The "good" approach here would be to use the appropriate DBI parameters to make the driver decode strings properly. But that will have a ripple-on effect of messing up all the places where manual decoding happens ;)
[LanX]: which means albeit being broken UTF8 it'll be handled correctly
[LanX]: and the problem only occurs since we changed the emails to base64

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