Reverse Range in Swift

Question

Is there a way to work with reverse ranges in Swift?

For example:

for i in 5...1 {
  // do something
}

is an infinite loop.

Answer 1

Swift 3, 4+: you can do it like this:

for i in sequence(first: 10, next: {$0 - 1}) {

    guard i >= 0 else {
        break
    }
    print(i)
}

result: 10, 9, 8 ... 0

You can customise it any way you like. For more info read func sequence reference