test.swift

/*
SWIFT TOUR
implicit variables and immutable variables
explicit variables
values need to be explicitly converted
use \() to convert a variable to a string (in quotes)

arrays and dictionaries

*/

// array
let colours:[String] = ["red", "orange", "green"]
print(colours.count)
print("\(colours)")

var shoppingList = [String]()
shoppingList.append("bread")
shoppingList.append("butter")
print("\(shoppingList)")
for item in shoppingList {
  print("\(item)")
}

// dictionary
var book   = [
  "isbn": "1491943122",
  "title": "Learning Node"
]

var ages = [String:Int]()
ages["john"] = 42
ages["jane"] = 24
print("\(ages)")
for (name, age) in ages {
  print("\(name) is \(age) years old")
}

// normally functions use their parameter names as labels so you need to have a custom argument label before each parameter name.
func printPerson(withName name:String, andAge age:Int) {
  print("\(name) is \(age) years old")
}

printPerson(withName: "frank", andAge: 64)

// use _ if you want to omit the first argument label.
func add(_ num1:Int, and num2:Int) -> Int {
  return num1 + num2
}

print(add(24, and: 42))

// OOP
/*
objects and classes
importing from separate file
create instance by putting parenthesis before class name.
private instance variables
properties (getters and setters)
methods
static 
*/

// ASYNC
/*
closures (callbacks)
*/

// FOUNDATION FRAMEWORK

// UNIT TESTING
/*
importing XCUnit
*/