Randy W. Sims wrote: > Roman Daszczyszak wrote: >> In my perl script, I have a "global" variable called >> @excludedIPAddresses, declared at the top of the script using my: > [...] >> >> When I run this, I get an error "Can't localize lexical variable". I >> understand that it's because the variable is declared using "my"; what >> I don't understand is why, or what I should declare the variable as, >> since if I leave out "my" I get an error using "use strict". > > The C<my> and C<our> declarators have less to do with scope than with > storage and access. > > Variables declared with C<my> are limited to the scope in which they are > declared and any inner scopes, and are known as "local" or "lexical" > variables. They may be re-declared within an inner scope, in which case > the inner scope masks the outer, but the outer variable still exists, it > retains its value, and it will be accessible again when control returns > to the outer scope. For C<my> variables, storage is tied to the scope in > which the variable is declared, in a "scratchpad" that is thrown away at > the end of the scope. C<my> variables can also be global variables when > declared in a large scope. > > Variables declared with C<our> are tied to a package and are stored as > part of the package, and are known as "package" variables. They are > accessible anywhere in the package by using the short name or outside > the package by using the fully qualified name (i.e. > <type-glyph><package-name>::<variable-name>).
Variables declared with our() have the same scoping rules as variables declared with my(). $ perl -le' use warnings; use strict; package me; our $x = q/our/; my $y = q/my/; package main; print for $x, $y; ' our my John -- use Perl; program fulfillment -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] <http://learn.perl.org/> <http://learn.perl.org/first-response>
