Fizz Buzz demo in Swift

fizz_buzz.swift

// if x is a multiple of 3  then output "fizz",
// if x is a multiple of 5  then output "buzz"
// if x is a multiple of 15 then output "fizz buzz"

// basic
func fizz_buzz_alpha(max: Int) -> () {
    for number in 1...max {
        if number % 15 == 0 {
            print("fizz buzz")
        } else if number % 3 == 0 {
            print("fizz")
        } else if number % 5 == 0 {
            print("buzz")
        } else {
            print(String(number))
        }
    }
}

// a better way
func fizz_buzz_beta(max: Int) -> () {
    for number in 1...max {
        var output: String = ""
        if number % 3 == 0 { output += "fizz" }
        if number % 5 == 0 { output += "buzz" }
        if output == "" { output = String(number) }
        print(output)
    }
}

// an even better way
func fizz_buzz_gamma(max: Int) -> () {
    for number in 1...max {
        
        // declare pairings here
        var dict = [
            3: "Fizz",
            5: "Buzz"
        ]
        
        var output: String = ""
        for (k, v) in dict {
            if number % k == 0 { output += v }
        }
        if output == "" { output = String(number) }
        print(output)
    }
}

// using Closures to detach dictionary
func make_fizz_buzz(kvs: [Int:String]) -> ((Int) -> ()) {
    func fizz_buzz(max: Int) -> () {
        for number in 1...max {
            var output = ""
            for (k, v) in kvs {
                if number % k == 0 { output += v }
            }
            if output == "" { output = String(number) }
            print(output)
        }
    }
    return fizz_buzz
}

var dict = [3: "Fizz", 5: "Buzz"]
let fizz_buzz_rho = make_fizz_buzz(kvs: dict)
fizz_buzz_rho(15)