fisherds

import UIKit

var x = 7
//var x : Float = 7
let dave = "Dave"
//dave = "Bob"

// Optionals
var optionalFloat : Float?
var requiredFloat : Float

fisherds

import Foundation

// String Concatenation
var myStr = "Hello," + " World"

// String append
myStr += "!"

// Looping over a string
for char in myStr {

fisherds

import UIKit

// Basics for arrays
var names = ["Dave", "Kristy", "McKinley", "Keegan", "Bowen", "Neala"]
names[1]
names[2] = "Kingsley"
names
if names.contains("Dave") {
  print("Dave is present!")
}

fisherds

// Basic function
func stringRepeater(originalString : String, repeatCount : Int) -> String {
    var repeatedString = ""
    for _ in 0..<repeatCount {
        repeatedString += originalString
    }
    return repeatedString
}

stringRepeater("Ho! ", 3)

fisherds

// Basic enum
enum Weekday {
    case Monday, Tuesday, Wednesday, Thursday, Friday
}

var today : Weekday
today = .Tuesday

switch today {
case .Monday, .Tuesday, .Thursday:

fisherds

// Simple class
class BankAccount {
    var name : String
    var balance : Double

    init(name : String, balance : Double) {
        self.name = name
        self.balance = balance
    }

fisherds

var values = [10, 5, 2, 8, 3, 6, 1, 1000]

// Verbose Closure
var numValuesOver5 = values.reduce(0, combine: {(runningTotal : Int, currentValue : Int) -> Int in
    return currentValue > 5 ? runningTotal + 1 : runningTotal
})

// Closure parameter name shorthand and trailing closure
var numValuesOver9 = values.reduce(0) {
    return $1 > 9 ? $0 + 1 : $0

fisherds

// We already know about constants vs variables but there is another choice always present.
var x = 7
var f : Float = 7
let dave = "Dave"
//dave = "Bob"  // Would cause an error

// Optionals
var optionalFloat: Float?
var requiredFloat: Float
print("optionalFloat = \(optionalFloat)")  // Generates a warning

fisherds

import UIKit
let dave = "Dave" // Earlier
var ten = "10"  // Earlier

// Views in a Playground + Optional Chaining
var b = UIButton(frame: CGRect(origin: CGPoint(x: 0, y: 0), size: CGSize(width: 100, height: 100)))
b.setTitle("Press me", for: .normal)  // Try commenting out this line to see the result below
b.backgroundColor = UIColor.red
b.titleLabel?.text   // Optional chaining
b.titleLabel!.text!  // Forced unwrapping

fisherds

// Basic enum
enum Weekday {
  case monday, tuesday, wednesday, thursday, friday
}
var today: Weekday
today = .thursday
//today.rawValue  // Enum was not given a rawValue Type (see State below)

switch today {
case .monday, .tuesday, .thursday: