Re: how do i create a global var conditionally?

Not shure if I get the point here, but it is possible if the global you want to create will be part of an existing array or hash.

use strict;
use warnings;

my @globalarray;
my $gatekeeper = 1;

if($gatekeeper)
{
    push @globalarray, 'foo';
    # creates $globalarray[0]
}
print "$globalarray[0]\n";
[download]

Comment on Re: how do i create a global var conditionally? Download Code

Replies are listed 'Best First'.
Re^2: how do i create a global var conditionally? by AnomalousMonk (Archbishop) on Mar 02, 2018 at 16:07 UTC
... the global you want to create ... But be aware that `my @globalarray;` still declares a lexical variable: it is not visible to any code prior to the point of declaration, and it is not visible in any other source file in the application. If a lexical is declared very early in a source file (update: and if it's not declared in a block scope of any kind, i.e., if it's "in file scope") and if there is only one source file in the application, then a lexical can give a pretty darn good imitation of a global, but it's still a lexical. Give a man a fish: `<%-{-{-{-<`	[reply] [d/l] [select]
Re^3: how do i create a global var conditionally? by rizzo (Curate) on Mar 09, 2018 at 17:29 UTC
Thanks for making that clear, AnomalousMonk. Good opportunity for me to revise my insight on the topic. And to find things here at the monastry I never heard of before: Re (tilly) 1: Can you create real global variables?	[reply]


Think about Loose Coupling
	PerlMonks