Created
March 8, 2018 18:23
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-- Normal data strcutures | |
data RecursiveList a = RNil | |
| RCons a (RecursiveList a) | |
exampleRlist :: RecursiveList Int | |
exampleRlist = RCons 1 (RCons 2 RNil) | |
foldRecList :: (b -> a -> b) -> RecursiveList a -> b -> b | |
foldRecList f lst basecase = helper basecase lst | |
where | |
helper cur (RCons v rest) = helper (f cur v) rest | |
helper cur RNil = cur | |
summedList = foldRecList (+) exampleRlist 0 | |
data RecursiveSparseTrie a = RLeaf a | |
| RNode (RecursiveSparseTrie a) | |
(RecursiveSparseTrie a) | |
exampleRTree :: RecursiveSparseTrie Int | |
exampleRTree = RNode (RLeaf 1) (RLeaf 2) | |
foldRecTree :: (b -> a -> b) -> RecursiveSparseTrie a -> b -> b | |
foldRecTree f tree basecase = helper basecase tree | |
where | |
helper cur (RLeaf v) = f cur v | |
helper cur (RNode s1 s2) = helper (helper cur s1) s2 | |
summedTree = foldRecTree (+) exampleRTree 0 |
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