C:/Perl_524/bin\perl.exe d:/tmp/pm/grep_autovivify.pl $VAR1 = [ 1, undef, 2, 3 ]; $VAR1 = [ 'a', 'c', 'b' ]; $VAR1 = [ 'a', 'b', 'c' ]; $VAR1 = [ 'a', 'c', 'b' ];