Find min / max value in Swift Array

Given an array of Swift numeric values, how can I find the minimum and maximum values?

I've so far got a simple (but potentially expensive) way:

var myMax = sort(myArray,>)[0]

And how I was taught to do it at school:

var myMax = 0
for i in 0..myArray.count {
    if (myArray[i] > myMax){myMax = myArray[i]}
}

Is there a better way to get the minimum or maximum value from an integer Array in Swift? Ideally something that's one line such as Ruby's .min and .max.

Given:

let numbers = [1, 2, 3, 4, 5]

Swift 3:

numbers.min() // equals 1
numbers.max() // equals 5

Swift 2:

numbers.minElement() // equals 1
numbers.maxElement() // equals 5

To calculate an array's min and max values yourself, you can use reduce. This was a key solution prior to .min() and .max() appearing in Swift.

Use the almighty reduce:

let nums = [1, 6, 3, 9, 4, 6];
let numMax = nums.reduce(Int.min, { max($0, $1) })

Similarly:

let numMin = nums.reduce(Int.max, { min($0, $1) })

reduce takes a first value that is the initial value for an internal accumulator variable, then applies the passed function (here, it's anonymous) to the accumulator and each element of the array successively, and stores the new value in the accumulator. The last accumulator value is then returned.