One of my favorite subs:

sub map_pairs(&@) {
  my $f = shift;
  my @res;

  no strict 'refs';
  no warnings 'once';
  my $caller = caller;
  local(*{$caller."::a"}) = \my $a;
  local(*{$caller."::b"}) = \my $b;

  push @res, $f->($a,$b) while ($a, $b) = splice @_, 0, 2;
  return @res;
}

[download]

gives:

map_pairs { $a } qw/a b c d/; # ac
map_pairs { $b } qw/a b c d/; # bd
map_pairs { uc($a),lc($b) } qw/a b c d/; # AbCd

[download]

But, yes, this very much crosses the line out of "one-liner" land

Good Day,
    Dean

In reply to Re: Mini-Tutorial: Working with Odd/Even Elements by duelafn
in thread Mini-Tutorial: Working with Odd/Even Elements by ikegami

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