Using defined on an aggregate's been out of fashion for a good while now.

$ perl -e 'use strict;use warnings;my @foo;if( defined @foo ) { print 
+"foo" }' |& splain
defined(@array) is deprecated at -e line 1 (#1)
    (D deprecated) defined() is not usually useful on arrays because i
+t
    checks for an undefined scalar value.  If you want to see if the
    array is empty, just use if (@array) { # not empty } for example.
    
        (Maybe you should just omit the defined()?)
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