maxpow4h/swiftz — pull request #83 by maxcan (2014-07-27 23:37:38+00:00)
Title: Added  either<A>(onL: L -> A, onR: R -> A) -> A  function

Nice little convenience from the haskell world:

```haskell
either :: either a b -> (a -> c) -> (b -> c) -> c
```