Paul Kraus wrote:
> Great article. Cleared up all of my confusion. However it did not
> touch on "our". Anyone care to explain what its used for.
Hi Paul.
An 'our' variable has the same visibility as a 'my' variable declared
in the same place, i.e. through to the end of the current lexical
scope (block or file). Unlike 'my', however, it is a permanent
package variable and its value will be retained across calls to a
subroutine (unless modified elsewhere). It may be accessed
anywhere (even from another package) by fully qualifying it.
Take a look at this:
#!perl
use strict;
use warnings;
&a; # sets $main::val
&b; # prints '10'
print $val; # illegal - undeclared
print $main::val; # prints '10'
sub a {
our $val = 10;
}
sub b {
our $val;
print $val;
}
__END_
HTH,
Rob
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