Iterating over arrays in haskell

Question

My problem is that I need to iterate over array and calculate some value depend on every element. I was looking for some fold-like function for arrays, but standard library seems to be very useless with arrays. Or i'm missing something?

The other solution may be 'binding' array to a list. Binding mean that I don't want to copy that array. Is this possible?

Btw, its all about plain Array.

Answer 1

Take a look at Data.Foldable. It defines a type class that does exactly what you want.

Answer 2

Using Data.Foldable you can foldr/foldl an Array just like you can a list.

Another option is that you can convert the Array back into a list with elems, and then foldr or foldl over the list.