Haskell, Applying function to each item in a list

Question

hey there another haskell question i have a function of type f :: CSP -> Assignment -> Var -> Int -> CSP

i want to write a function with the type

g :: CSP -> Assignment -> Var -> [Int] -> CSP

which applies the original function to all of the elements in the list [Int]. The CSP that it is passed should be updated each time f is applied, the Assigment will stay the same as will the Var. I'm pretty sure I need to use a fold but I really don't understand them. I'd really appreciate it if somebody could help me out and maybe try and explain folds.

possible duplicate of [Functional Programming, Haskell applying a function to a list of variables](http://stackoverflow.com/questions/9398085/functional-programming-haskell-applying-a-function-to-a-list-of-variables) — dave4420, Feb 25 '12 at 21:32

score 2 · Answer 1 · answered Feb 25 '12 at 21:32

2

You said you've worked it out, but just in case:

g c a v is = foldl (\c i -> f c a v i) c is

answered Feb 25 '12 at 21:32

Thomas M. DuBuisson

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Haskell, Applying function to each item in a list

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