Solving diophantine equations works in Perl 5.8 as well:
in reply to The Oldest Plays the Piano
PS: I did not invent this, but found it somewhere and cannot remember where.
# Solve 12x + 15y + 16z = 281
$_ = 'o' x 281;
print length($1),"\t", length($2),"\t", length($3),"\n";
A program should be light and agile, its subroutines connected like a string of pearls. The spirit and intent of the program should be retained throughout. There should be neither too little or too much, neither needless loops nor useless variables, neither lack of structure nor overwhelming rigidity." - The Tao of Programming, 4.1 - Geoffrey James