How to split an integer into an array of its digits

Paul Hudson    March 30th 2018    @twostraws

You can take any integer number and convert it to array of integer digits using this extension:

extension BinaryInteger {
    var digits: [Int] {
        return String(describing: self).compactMap { Int(String($0)) }
    }
}

That’s a protocol extension, so you should be able to call it using Int, UInt64, Int8, and so on.

Available from iOS 8.0

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