use Test::More;
use strict; use warnings FATAL => 'all';
use List::Objects::WithUtils 'array';
my $arr = array(4, 2, 3, 1);
my $sorted = $arr->sort(sub { $_[0] <=> $_[1] });
is_deeply
[ $sorted->all ],
[ 1, 2, 3, 4 ],
'sort ok';
$sorted = $arr->sort;
is_deeply
[ $sorted->all ],
[ 1, 2, 3, 4 ],
'sort with default sub ok';
done_testing;