haskell-lectures/VL2/content/VL2_rec_patterns2.tex
2015-04-20 00:51:14 +02:00

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Let's say we have a list of \code{Int} and want to add \code{2} to every element of the list.
\begin{haskellcode}
addTwo :: [Int] -> [Int]
addTwo ... ?
\end{haskellcode}
\pause
\textbf{Exercise:} Find the answer! 5 minutes time, remember the \emph{cons} operator \code{(:)}, pattern matching on lists and ofc recursion! Start with the case of an empty list.