Maybe you want something like
curryWithList :: ([a]->b)->[a]->([a]->b)
curryWithList f lst1= \lst2 ->f (lst1++lst2)
addThemUp = sum
curried = curryWithList addThemUp [1,2,3,4]
curried [5] =15
On Thu, Aug 7, 2008 at 8:35 PM, Henning Thielemann
On Thu, 7 Aug 2008, Sukit Tretriluxana wrote:
Dear Haskell experts,
I am currently studying Groovy language. An experiment I did with its closure is to perform closure/function "curry" using an array containing the values for the parameter binding. See the sample below.
int addThemUp(a,b,c,d,e) { a+b+c+d+e } def arrayCurry(arr, cls) { arr.inject(cls) { c, v -> c.curry(v) } } println addThemUp(1,2,3,4,5) println arrayCurry([1,2,3,4,5], this.&addThemUp)() println arrayCurry([1,2,3,4], this.&addThemUp)(5)
The printouts from the above code are the same, verifying that the code works fine. Then I come to ask myself how I can do the same in Haskell. I'm not a Haskell expert so I couldn't figure it. I wonder if you guys could shed some light on this.
I do not know Groovy, but maybe you want something like
addThemUp :: Num a => (a,a,a,a,a) -> a addThemUp (a,b,c,d,e) = a+b+c+d+e
-- should be better named list5Curry or so arrayCurry :: ((a,a,a,a,a) -> a) -> [a] -> a arrayCurry cls [a,b,c,d,e] = cls (a,b,c,d,e)
print (addThemUp(1,2,3,4,5::Int)) print (arrayCurry addThemUp [1,2,3,4,5::Int])
However, it's hardly of any use, since you won't use a list if the number of elements is fixed (and small) or if the elements even must have distinct types. _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe