Well, ehm, I'm trying to understand "map" in "map" functions, however I do understand list comprehensions. But I don't think I can write "any" "map" in "map" function into a list comprehension can I?

2009/4/14 Daniel Fischer <daniel.is.fischer@web.de>

Am Dienstag 14 April 2009 10:39:28 schrieb Tsunkiet Man:

> Hello,
>
> I can hardly imagine how the following code works:
>
> cinits :: [a] -> [[a]]
> cinits [] = [[]]
> cinits (x:xs) = [] : map (x:) (cinits xs)
>
> can someone give me a good explaination?

Perhaps it's easier to follow as a list comprehension:

cinits [] = [[]]
cinits (hd:tl) = [] : [ hd : rest | rest <- cinits tl ]

>
> (I understand it a bit, but it's really hard for me to figure out how a map
> in a map function works.)
>
> Thank you for your time,
>
> Tsunkiet