You can also implement reduce in native Perl: 
sub reduce (&@) {
  my $op = shift;
  no strict 'refs';
  my $pkg = caller;
  local *A = local *{"$pkg\::a"};
  $A  = shift;
  local *B = local *{"$pkg\::b"};
  foreach $B (@_) {
    $A = $op->();
  }
  $A;
}

[download]
(Stolen shamelessly from here, with full permission of the author. :-)

UPDATE
D'oh. I should have read the source-code. They don't present that in the documentation... And I wrote it originally because someone (jcwren I think) was having trouble running my code at Re (tilly) 1: An exercise in "That's not the way I'd do it" (TNTWIDI) because List::Util wasn't compiling.

In reply to Re (tilly) 2: List-to-Scalar Function? by tilly
in thread List-to-Scalar Function? by Masem

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