How do I fetch the last element of an array in Swift?

As of beta5 there is now a first and last property

In addition to Array acquiring first and last, the lazy collections also implement first (and last if they can index bidirectionally), as well as isEmpty.

Update: Swift 2.0 now includes first:T? and last:T? properties built-in.

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When you need to you can make the built-in Swift API's prettier by providing your own extensions, e.g:

extension Array {
    var last: T {
        return self[self.endIndex - 1]
    }
}

This lets you now access the last element on any array with:

[1,5,7,9,22].last