selitys

fibonacci.hs

fibs = 0 : 1 : zipWith (+) fibs (tail fibs)

{-|
	0 : 1 : ... combines 0, 1 and the result of zipWith into an (infinite) list
	(tail fibs) is functionally equivalent to fibs.Skip(1)
	zipWith takes a function and two (infinite) lists as arguments
	it creates an (infinite) list by lazily applying the function to every item of both lists

	meta-c#:

	IEnumerable<int> Fibonacci()
	{
		yield 0;
		yield 1;

		while(true)
		{
			yield Fibonacci() + Fibonacci().Skip(1);
		}
	}

-}