gistfile1.swift

// Playground - noun: a place where people can play

import Cocoa

struct MagicNumber {
	
	var skip: Bool = false
	
	var f: Float? {
	didSet {
		if skip {skip = false; return}
		skip = true
		i = Int(f!)
	}
	}
	
	var i: Int?{
	didSet {
		if skip {skip = false; return}
		skip = true
		f = Float(i!)
	}
	}
	
	func value() -> AnyObject {
		if let f = f {
			return f
		}
		if let i = i {
			return i
		}
		
		return NSNull()
	}
	
	init (float: Float) {
		f = float
	}
	
	init (int: Int) {
		i = int
	}
}

var a = MagicNumber(int: 1)
var b = MagicNumber(float: 1.5)

a.value()
b.value()

a.i = 2
a.f = 5.4