## 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