\begin{itemize}
\item what is the difference between \hinline{let} and \hinline{where}?
\item what is the difference between \hinline{foldr} and \hinline{foldl}?
\item what is the difference between explicit and implicit recursion? Give examples
\item how many arguments does a haskell function have (strictly speaking)?
\item Are these type signatures technically equivalent?
\begin{haskellcode}
f :: Int -> Int -> Char -> Int -> Int -> Char
f :: Int -> Int -> (Char -> (Int -> (Int -> Char)))
\end{haskellcode}
% $
\item what do you have to keep in mind in order to make function composition work?
\item can you define \hinline{map} and \hinline{filter} in terms of \hinline{foldr}?
\item simplify (and eta reduce) the following code snippet
\begin{haskellcode}
f x y = (\d e -> d * e) x $ y
\end{haskellcode}
% $
\end{itemize}