FizzBuzz by swift

gistfile1.swift

// FizzBuzz by Enum
enum FizzBuzz {
    case Fizz, Buzz, FizzBuzz, Other(Int)
    
    var state: String {
        switch self {
        case .Fizz:         return "Fizz"
        case .Buzz:         return "Buzz"
        case .FizzBuzz:     return "FizzBuzz"
        case .Other(let i): return "\(i)"
        }
    }
}

func judge(i: Int) -> FizzBuzz {
    switch (i % 3, i % 5) {
    case (0, 0): return .FizzBuzz
    case (0, _): return .Fizz
    case (_, 0): return .Buzz
    default:     return .Other(i)
    }
}

func generate(to: Int) -> [FizzBuzz] {
    switch to {
    case 1:  return [judge(to)]
    default: return generate(to - 1) + [judge(to)]
    }
}

generate(15).map { println($0.state) }

// FizzBuzz by extension of Int
extension Int {
    var fizzBuzz: String {
        switch (self % 3, self % 5) {
        case (0, 0): return "FizzBuzz"
        case (0, _): return "Fizz"
        case (_, 0): return "Buzz"
        default:     return "\(self)"
        }
    }
}

func gen(x: Int) -> [String] {
    switch x {
    case 1: return [x.fizzBuzz]
    default: return gen(x - 1) + [x.fizzBuzz]
    }
}

gen(15).map { println($0) }