swift.html

Variables
==========
var greeting: String = "Hello World"
Constants 
=========
let languageName = "Swift" // inferred as String
let version = 1.0 // inferred as Double
let introduced = 2014 // inferred as Int
let isAwesome = true // inferred as Bool

Data Types
==========
Int -for whole numbers.
Double and Float for floating-point numbers 
and Bool for boolean values such as: true of false.


Array
=====
var cardNames: [String] = ["Jack", "Queen", "King"] - an array of a single type
- an array with multiple types.

Modifying an Array
==================
Lets create a new array that contains a todo list.
	var todo = ["Write Blog","Return Call"]

To add another item to our todo array we use the ‘+=’ operator:


Dictionary
==========

The other collection type is a Dictionary which is similar to a Hash Table in other programming languages. A dictionary allows you to store key-value pairs and access the value by providing the key.

var cards = ["Jack" : 11, "Queen" : 12, "King" : 13]


Control Flow
============
	loops - while, do-while,for and for-in

	while !complete {
		println("Downloading...")
	}

	var message = "Starting to download"
	do {
		println(message)
		message = "Downloading.."
	} while !complete 

	for var i = 1; i < cardNames.count; ++i {
		println(cardNames[i])
	}

	for cardName in cardNames {
		println(cardName)
	}

	for number in 1...10 {
		println("\(number) times 2 is \(number*2)")
	}

	for (cardName, cardValue) in cards {
		println("\(cardName) = \(cardValue)")
	}

Switch Statement :
==================
	switch cardValue {
		case 11:
			println("Jack")
		case 12: 
			println("Queen")
		default:
			println("Not found")
	}

Functions :
===========
	func printCard() {
		println("Queen")
	}
	func printCard(cardName: String) {
		println(cardName)
	}

Array :
=======
var shoppingList = ["Eggs", "Milk"]

shoppingList.append("Flour")
or 
shoppingList += ["Baking Powder"]

for item in shoppingList {
	println(item)
}

for (index, value) in enumerate(shoppingList) {
	println("Item \(index + 1): \(value)")
}	

Functions Without Parameters
==============================
func sayHelloWorld() -> String {
	return "hello, world"
}

Closure Expression Syntax
============================

 Closure expression syntax has the following general form:

    { (parameters) -> return type in

        statements

    }