I am surprised that nobody used the fact that negative subscripts work: 
@a = qw(emacs vi);
print "Why do we have to hide from the police, daddy ?
  Because they use $a[$_] and we use $a[$_-1], son.
" for 0..1;

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In reply to Re (tilly) 1: for vs. reverse by tilly
in thread for vs. reverse by Corion

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