Luhn algorithm implemented in Swift

creditCard.swift

let creditCardNumbers = [
    4964149475059987,
    4898620401632387,
    4393958570449195,
    4751492711160905,
    4437340772573099,
]

let valid = creditCardNumbers.filter 
{ number in
    let digits = String(number).compactMap{ $0.wholeNumberValue }
    let reversed = digits.reversed()
    var sum = 0

    for (index, element) in reversed.enumerated()
    {
        let even = (index % 2 == 0)
        let digit = even ? element : element * 2
        sum += digit > 9 ? digit - 9 : digit
    }

    return sum % 10 == 0
}

print(valid)