Too golfy or arcane? (fixed now) 
sub map_pairs(&@) {
  my $fn = shift;

  my $pkg = $main::{caller().'::'};

  map {
    @{$pkg}{qw(a b)} = \(@_[0,1]);
    $fn->(shift, shift);
  } (0..$#_/2);
}

package Smarter;
our($a, $b) = qw(orig value);
my @arr = qw(a b c d);
print main::map_pairs {$_[0] = uc($a); print "[$a $_[1]]\n"; $a} @arr;
print "\n";
print "Now @arr\n";
print "\n$a $b\n";

[download]
I like being able to avoid sym refs and all the globbage. The interesting thing to note is that I seem to get a magical localization of my variables.
Caution: Contents may have been coded under pressure.

In reply to Re^3: Mini-Tutorial: Working with Odd/Even Elements by Roy Johnson
in thread Mini-Tutorial: Working with Odd/Even Elements by ikegami

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.