[Haskell-cafe] Length of lists within list of lists?

[aditya siram]

You need a method that will find the length of a list:
length :: [a] -> Int
and a method that will applies a function to every element of a list
and make a list of the results:
map :: (a ->b) -> [a] -> [b]

Try and put them together.

hth,
-deech



On 4/10/10, boblettoj <boblettoj99 at msn.com> wrote:
>
> Hi i want to know if there is any method i can use to count the number of
> items in each list in a list of lists, eg.
>
> someMethod [[a, b, c], [a], [b, d, e, f]]
> would return [3, 1, 4]
>
> is there anything that can do this?
> thanks
>
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