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robotlolita/gist:843782

Created February 25, 2011 13:36
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gistfile1.coffee
# Pair stepper generator
(defun pair_stepper: (seq) ->
(letb (slen = (len seq)) ->
(stepper seq, (idx) ->
(if idx + 1 >= slen
((list idx, $break))
else
(list idx + 1, (nth idx, seq, 2))))))
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