doubling a number seems simpler than doing the modulo, thus:

# change even-numberd list entries to 'hi'
foreach $i (0..@list/2) {
    $double = $i * 2;
    $list[$double] = 'hi';
}
[download]

of course you could do away with the extra variable "$double". loose the variable, insert another line of comment to explain what happens. same difference.

--
Brigitte    'I never met a chocolate I didnt like'    Jellinek
http://www.horus.com/~bjelli/         http://perlwelt.horus.at