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Julian Ospald 2015-04-20 20:14:07 +02:00
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VL1/content/VL1_lists2.tex
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Let's check on a few very common list operations:
\begin{haskellcode}
> [1, 2] ++ [4, 5] -- append two lists
> head [1, 2, 3] -- first element
> tail [1, 2, 3] -- everything after the head
> [1, 2] ++ [4, 5] -- append two lists
> head [1, 2, 3] -- first element
> tail [1, 2, 3] -- everything after the head
> reverse [1, 2, 3] -- reverse a list
> take 2 [1, 2, 3] -- take the first two elements
> drop 2 [1, 2, 3] -- drop the first two elements
> take 2 [1, 2, 3] -- take the first two elements
> drop 2 [1, 2, 3] -- drop the first two elements
> sum [1, 2, 3]
> elem 7 [1, 2, 3] -- is there a 7 in the list?
> elem 7 [1, 2, 3] -- is there a 7 in the list?
\end{haskellcode}
\pause
A String in haskell is just a list of Chars!