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+
+## Lists
+
+```hs
+------------ !! mapAccumL 
+mapAccumL :: (s -> a -> (s, b)) -> s -> [a] -> (s, [b])
+------------
+```
+
+
+> Generics in C?
+
+> Implement Haskell lists in Python
+
+> Forall and exists in functional programming
+
+https://hackage.haskell.org/package/base-4.3.1.0/docs/src/Data-List.html
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