A really enlightening article: it threw light on what was a mysterious theme for me. I'd offer a suggestion, for the 4th code snippet, which bit me when I tried out with
use strict. If we run it like this:
use strict;
use warnings;
package Szyewicki;
our ($Robert);
$Robert = "the boss";
package PoolHall;
our ($Robert);
$Robert = "the darts expert";
package Szyewicki;
print "Here at work, 'Robert' is $Robert, but over at the pool hall, '
+Robert' is $PoolHall::Robert\n";
The result, which puzzled me at first, will be:
Here at work, 'Robert' is the darts expert, but over at the pool hall,
+ 'Robert' is the darts expert
It took me quite a while to decypher why: the lexical scope of the 2nd
our, under package PoolHall, is the file, so, when we switch to package Szyewicki, it's still in effect, making $Robert a lexical alias to package variable $Szyewicki::Robert. To work as expected and intended, the code must be:
use strict;
use warnings;
package Szyewicki;
our ($Robert);
$Robert = "the boss";
package PoolHall;
our ($Robert);
$Robert = "the darts expert";
package Szyewicki;
our ($Robert);
print "Here at work, 'Robert' is $Robert, but over at the pool hall, '
+Robert' is $PoolHall::Robert\n";
The 3rd
our alias $Robert to $Szyewicki::Robert.
