How to reverse sort an array
Regular sorting on comparable data is as easy as calling the sort() method, but if you want a reverse sort – e.g. highest to lowest numbers, or Z-A alphabetically – there are two options.
The first is to run a regular sort, reverse that sort, then convert the result to an array. For example:
let numbers = [100, 5, 53, 98, 29]
let reversed1 = Array(numbers.sorted().reversed())The second option is to provide a custom closure to the sorted() method that sorts the opposite way to the default, like this:
let reversed2 = numbers.sorted { $0 > $1 }Both of those will result in the array 100, 98, 53, 29, 5.
Available from iOS 8.0
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