Don't forget grep!

my @True;
for my $Element (@Array){
  if ($Element){
    push @True, $Element;
  }
}
[download]

becomes:

my @True = grep {$_} @Array;
[download]

To get every nth element from a list:
(Previously posted by me as Anonymous Monk...)

#(For every fourth element in @List)
grep {not ++$i % 4} @List;

#(To skip every fifth element)
grep {++$i % 5} (1..50)
[download]

I suppose we could argue that grep isn't really intended as a looping mechanism, but map seems to be popular around here, and map is implemented on grep code (internally) so...

:-)

Russ