[stack] Programming Puzzle

"Christopher Diggins" <[email protected]>
Newsgroups gmane.comp.lang.concatenative
Message-ID <[email protected]> 
For your amusement here is a fun programming puzzle:

Define a while loop that takes a loop body and termination predicate
in Joy using only the following combinators:

"ifte","cat","swap","dup","pop","i","dip" and "unit"

Cheers,
Christopher
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