deathlezz

//
// Simple use of sets
//

// basic set
var colors = Set(["yellow", "green", "green", "black", "purple"])
print(colors)     // ["purple", "yellow", "black", "green"]

colors.remove("green")
print(colors)     // ["black", "purple", "yellow"]

deathlezz

//
// Simple use of arrays
//

// basic array
var band = ["Steve", "Bob", "Kevin"]
print(band[0])     // Steve

band.append("Jack")
print(band)     // ["Steve", "Bob", "Kevin", "Jack"]

deathlezz

//
// Simple use of loops
//

// for loop
let range = 1...5
for i in range {
    print("Number is \(i)")
}
// Number is 1

deathlezz

//
// Simple use of dictionaries
//

// basic dictionary
var age = [
    "Jack": 23,
    "Alice": 25
]
age["Mark"] = 45

deathlezz

//
// Simple use of functions
//

// basic function
func description() {
    print("Here's Johnny!")
}
description()     // Here's Johnny!

deathlezz

//
// Ternary operator
//

// example #1
var first = 4
var second = 5
print(first == second ? "Numbers are equal" : "Numbers are different")     // Numbers are different

deathlezz

//
// Simple use of optionals
//

// unwrapping with if let
var nickname: String? = nil

if let unwrap = nickname {
    print("Successfully created user as: \(unwrap).")
} else {

deathlezz

//
// Simple use of protocols
//

// basic protocol
protocol Info {
    var name: String { get set }
}

struct User: Info {

deathlezz

//
// Simple use of closures
//

// basic closure
let basic = {
    print("I like pizza.")
}
basic()     // I like pizza.

deathlezz

//
//  Timer App
//

import Foundation

// time left to finish
var (hours, minutes, seconds) = (1, 0, 3)

// convert hours, minutes and seconds to seconds and add them together