[Haskell-cafe] How to join two lists of lists?
robert dockins
robdockins at fastmail.fm
Tue May 3 16:31:06 EDT 2005
> Hi all!
> I'm trying to join to lists of lists. The problem is, i would like to
> get a new list of lists of tuples and not list of tuples of lists (that
> what zip makes).
>
> list1 = [[1,2],[3,4],[5,6]]
> list2 = [[a,b],[c,d],[e,f]]
>
> desiredlist = [[(1,a),(2,b)],[(3,c),(4,d)],[(5,e),(6,f)]]
Prelude> let list1 = [[1,2],[3,4],[5,6]]
Prelude> let list2 = [['a','b'],['c','d'],['e','f']]
Prelude> zipWith (zip) list1 list2
[[(1,'a'),(2,'b')],[(3,'c'),(4,'d')],[(5,'e'),(6,'f')]]
Why do you want to do this?
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