Zip function

[kostiakoval]

I wanted to implement zip function
But i'm not sure if Tuples are designed to be used this way in Swift as in Haskell.

http://stackoverflow.com/questions/24487519/how-to-elegantly-compare-tuples-in-swift/24495112#24495112

Tuples are useful for temporary groups of related values. They are not suited to the creation of complex data structures. If your data structure is likely to persist beyond a temporary scope, model it as a class or structure, rather than as a tuple. For more information, see Classes and Structures.

What do you think ?

[RuiAAPeres]

I was actually basing my zip function on this one.

zipWith' :: (a -> b -> c) -> [a] -> [b] -> [c]  
zipWith' _ [] _ = []  
zipWith' _ _ [] = []  
zipWith' f (x:xs) (y:ys) = f x y : zipWith' f xs ys

And the example:

ghci> zipWith' (+) [4,2,5,6] [2,6,2,3]  
[6,8,7,9]  

Something I was thinking was to pass a default function, in case we don't pass one. The default one, would be the same as your implementation: tuple creation. Something along the lines:

func zip<X,Y,Z>(listX : [X], listY : [Y], zipFunction : (X,Y)-> W = ... ) -> [W]

The ... would be replace by a default tuples creation function.

[RuiAAPeres]

@konstantinkoval I am good on changing the zip function to the official implementation, although I would like to keep the recursive piece.

[kostiakoval]

There is Zip2 struct in Swift. Have a look on it. Maybe we could use it for zip

[RuiAAPeres]

@konstantinkoval

let zip = Zip2([1, 2, 3], [1, 2, 3])
let zippedArray = Array(myZip)

Result:

[(1, 1), (2, 2), (3, 3)]