mapping a function to a list in Haskell 2 elements a time

I am trying a few problems (at Spoj) in Haskell and I have stumbled on quite a few which have input of the form: ``` testcase_1 testcase_1_continued testcase_2 testcase_2_continued ``` or ``` testcase_1 testcase_1_continued ... ``` As you can see, one cannot solve this by just using `words` or `lines` on the input and then mapping the solver function to get something like ``` [solver test1, solver test2, ...] ``` One should use a function with two arguements, which are two list elements, one after the other, and get: ``` [solver test1 test1continued, solver test2 test2continued, ...] ``` So I would be pleased to find an analogous function to `map` which applies a function 2 arguments at a time.I have not been able to find anything on Hoogle, and however easy it would be to write such a function, I am looking for a more general approach to the problem.Or, if my approach(of insisting on `map`) is definitely wrong, one could also point me to the right direction. Edit: I actually found it really useful to implement a function map2 which maps a function to a list, only it works two arguments a time: ``` map2 f [a,b,c,d] ==> [f a b, f c d] ```