in reply to Printing Stacks

Your @stack is just an array, and you want to see them in the reverse order: 

print $stack[ $_ ] for reverse 0 .. $#stack;

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And if you really want to destroy the stack in the process, add:

undef @stack;

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You could also do:

print while pop @stack;

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But that's just wasteful :) (It's actually not, perl's arrays are well optimised for this operation.)

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