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blog/2015-08-22-recursion.markdown

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+---
+layout: post
+title: "Recursion"
+date: 2015-08-22 00:28
+comments: true
+categories:
+- haskell
+- recursion
+- fibonacci numbers
+---
+
+```haskell
+fibonacci :: [Integer]
+fibonacci = 1:1:(zipWith (+) fibonacci (tail fibonacci))
+```
+
+Above is a simple function that generates an infinite stream of fibonacci numbers. Its written in haskell.
+
+This is a piece of code that made me think a lot lately, it make clever use of recursion to define the stream and computes with a linear number of additions. I think its pretty damn sexy!
+
+## Notes:
+- Many thanks to a co-worker who helped me figure this out.
+- I hear that there are more efficient ways to compute fibonacci numbers (namley O(logn)). - should investigate this