RosettaCodeData/Task/Flatten-a-list/PicoLisp/flatten-a-list-1.l
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2013-04-10 21:29:02 -07:00

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(de flatten (X)
(make # Build a list
(recur (X) # recursively over 'X'
(if (atom X)
(link X) # Put atoms into the result
(mapc recurse X) ) ) ) ) # or recurse on sub-lists