in reply to Re: Re: Re: Re: Scope Between global and my
in thread Scope Between global and my

You don't have to turn off strict if you either
a) package-qualify the variable name, as in my previous example; or
b) declare the variable using our or use vars.

our is supposed to be a more modern replacement for use vars, but they don't do exactly the same thing, so which one is most appropriate really depends on your specific circumstances.

jdporter
The 6th Rule of Perl Club is -- There is no Rule #6.

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Re: Re: Re: Re: Re: Re: Scope Between global and my
by SkipHuffman (Monk) on Apr 01, 2004 at 18:40 UTC

    Ok, here is what my code looks like. (Strict hates this)

    local( $ItemNumber, %CFL, @CFD, #Customer %DFL, @DFD, #Destination %IFL, @IFD, #Item %MFL, @MFD, #Master %SFL, @SFD, #Description %UFL, @UFD #User );

    How do I also declare these variables our ?

    Not like this:

    our local( $ItemNumber, %CFL, @CFD, #Customer %DFL, @DFD, #Destination %IFL, @IFD, #Item %MFL, @MFD, #Master %SFL, @SFD, #Description %UFL, @UFD #User );

    that just does not work.

    or like this:

    local our ( $ItemNumber, %CFL, @CFD, #Customer %DFL, @DFD, #Destination %IFL, @IFD, #Item %MFL, @MFD, #Master %SFL, @SFD, #Description %UFL, @UFD #User );

    that works, but strict still is not happy.

    Sorry to be dense.

    Skip

      You have to declare (using our) before you can localize. Example follows.

      # in main file sub main { # declare, then localize: our ( $ItemNumber, %CFL, @CFD, #Customer %DFL, @DFD, #Destination %IFL, @IFD, #Item %MFL, @MFD, #Master %SFL, @SFD, #Description %UFL, @UFD #User ); local ( $ItemNumber, %CFL, @CFD, #Customer %DFL, @DFD, #Destination %IFL, @IFD, #Item %MFL, @MFD, #Master %SFL, @SFD, #Description %UFL, @UFD #User ); # set some values: $ItemNumber = 6; # call other subs. Can be in other lexical locations, but MUST # be in the same namespace for this 'our' to work! child_sub1(); }
      # in child file 1: sub child_sub1 { # declare ONLY: our ( $ItemNumber, %CFL, @CFD, #Customer %DFL, @DFD, #Destination %IFL, @IFD, #Item %MFL, @MFD, #Master %SFL, @SFD, #Description %UFL, @UFD #User ); print "Item: $ItemNumber\n"; }
      Since our has lexically-scoped effect, you would put that declaration at the inner-most necessary lexical scope, i.e. inside each of the relevant subs. But only put the local at the point where you want to "protect", i.e. "save", any current values of these variables, i.e. in your "main" sub -- probably just below the our declaration.

      jdporter
      The 6th Rule of Perl Club is -- There is no Rule #6.

        Thanks, that does answer the question. I still think I must be missing something though. But, I have the code working, and I only wince a little when I see that section.

        Again, thank you so much for your help. You and the Monestary are really helping my birth into the world of perl.

        Skip