$ 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 it
    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()?)