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jb55/comonadic_tree.hs

Created June 30, 2014 01:46
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comonadic_tree.hs
λ putStrLn $ drawVerticalTree $ Node "a" [Node "b" [Node "c" []], Node "d" []]
a
|
--
/ \
b d
|
c
λ putStrLn $ drawVerticalTree $ join $ duplicate $ Node "a" [Node "b" [Node "c" []], Node "d" []]
a
|
-----------
/ | | \
b d b d
| |
c --
/ \
c c
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