in reply to any built in function to take out null arrays elements?

And when 5.10 arrives
#!/usr/local/bin/perl5.9.5 # use feature ":5.10"; use strict; use warnings; print "content-type: text/html\n\n"; my @userArray = qw(batman robin joker); my @userArray2; #this is a null array my @mainArray = (@userArray, @userArray2); my @set; # A loop, just for this example... for(@mainArray) { when ( ! defined $_ ) { next } when ( /^$/ ) { next } default { push @set, $_ } } say "@set";
I of course do not mean this as a serious (Use this in production) reply to the op.
"That which we persist in doing becomes easier, not that the task itself has become easier, but that our ability to perform it has improved."
  --Ralph Waldo Emerson