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when toggle format what by license comment
Sep 7, 2014 at 19:27 comment added David Harkness Another option is to implement each traversal method as an iterator.
Sep 7, 2014 at 18:37 history edited toto2 CC BY-SA 3.0
added 2 characters in body
Sep 7, 2014 at 17:42 history answered toto2 CC BY-SA 3.0