gistfile1.txt

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

// 1) Using git on the command line, how do you tell if there are
//    changes on a remote?
//    git fetch [remote]

// 2) How do you retrieve the changes?
//    git pull

// 3) What is Github and what is it used for?
//    Commercial website that hosts git repos. Useful for sharing,
//    and collaborating on code

// 4) What is the syntax for declaring a constant named "foo" and 
//    setting it equal to 42?
let foo = 42

// 5) What is the syntax for declaring an optional String variable named "bar"?
var bar:String?

// 6) Write a function that takes two integers and returns an integer after
//    adding them together

func add(num1:Int, num2:Int) -> Int {
  return num1 + num2
}
add(3,num2: 5)

// 7) Write a function that takes two optional integers and returns an optional
//    integer. It adds the params together and returns the result, if they exist.

func addOpt(num1:Int?, num2:Int?) -> Int? {
  var result:Int?
  if let num1 = num1,
    num2 = num2 {
      result = num1 + num2
  }
  return result
}

addOpt(5, num2: 3)

var num1:Int? = 5
var num2:Int?
addOpt(num1, num2: num2)

// 8) Devine Class and Instance and how we use each in Swift
//    A Class is a blueprint for an object, including properties, super classes, etc
//    An Instance is a instantiated object of a Class

// 9) What are the 3 Swift collection types? What distinguishes each?
//    Array - Elements are stored at a specific index, starting at 0
//    Dictionary - Elements are stored at a non-numerical index, random ordering
//    Set - Elements are stored at a non-numerical index, no duplicate values

// 10) Name 5 online resources one can get quality information on developing Swift for iOS
//     Ray Wenderlich (raywenderlich.com/category/swift)
//     http://masilotti.com/ (UI Testing, Swift Testing)
//     https://developer.apple.com/swift/resources/ (Apple docs)
//     https://developer.apple.com/library/ios/documentation/Swift/Conceptual/Swift_Programming_Language/GuidedTour.html#//apple_ref/doc/uid/TP40014097-CH2-ID1 (Apple Swift book)
//     Big Nerd Ranch (https://www.bignerdranch.com/blog/)