19 lines
553 B
TeX
19 lines
553 B
TeX
|
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
|
||
|
|
> 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
|
||
|
|
> sum [1, 2, 3]
|
||
|
|
> 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!
|
||
|
|
\begin{haskellcode}
|
||
|
|
> ['a', 'b', 'c']
|
||
|
|
> 'a' : []
|
||
|
|
> head "abc"
|
||
|
|
> 'a' ++ 'c'
|
||
|
|
\end{haskellcode}
|