| Chaining results using match can get pretty untidy; luckily, the `try!` macro | |
| can be used to make things pretty again. The `try!` macro expands to a match | |
| expression, where the `Err(err)` branch expands to an early `return err`, and | |
| the `Ok(ok)` branch expands to an `ok` expression. | |
| {try.play} | |
| Be sure to check the [documentation](http://doc.rust-lang.org/std/result/type.Result.html), | |
| as there are many methods to map/compose `Result`. |