Lecture1-2.playground.swift

import UIKit

//Hvilken type er `value`?

let value0 = 42

var value1: String = "10" + "lsddsakndas njk"
value1 += "dfklmf"

let value2: Int = 10

let value3 = 10.0

let value4: Array<String> = ["1", "2", "3"]
let arr: [String] = ["1", "2", "3"]
let arr33 = ["1", "2", "3"]


let value5: Set<String> = Set(arr)
let value6_2 = Set(arrayLiteral: "1", "2", "3")

let value6 = Set(arrayLiteral: 1, 2, 3)

let value7: [String: Int] = ["a": 42]

var value7_not_use_it_like_this = Dictionary<String, Int>()
value7_not_use_it_like_this["a"] = 42
//



// Kompilerer det? Hvorfor ja? Hvorfor nei? Forklar!
//
//
///let value2: String = 42
//
//let value3 = 10.0 + 10 // Double!
////
//let value4 = 10 + Int(truncating: true)
////
////let value5 = "10" + "10"
////
//let value5 = "10" + "Monday"
//
let answer6 = true, wrongAnswer = false
//
let answer7 = true, value = 42, film = "Inside"
//
//
//
//8.
//
//var value8 = 42
//
// value8 += 1
//
//
//
//let value9 = (4 * 5) / 0
//
//var value10 = Set(["1"]).union(Set(["1"]))
//value10.insert("1")
//value10.insert("2")
//value10
//
let value11 = ["1"] + []
//
let value12 = ["1"] + [2]
//
//
//
//13.
//
 let set1 = Set(arrayLiteral: 1, 2, 3, 4, 5)

 let set2 = Set(arrayLiteral: 4, 5, 6)

let set = set1.union(set2) //-> 1,2,3,4,5,6
//
//
//var a = "key"
//let value14 = [a: 42]
////

var value15 = ["b": 42]
value15["b"] = nil
value15.count


//
let value16 = ["a": 42, "b": true] as [String : Any]
//
//let value17 = ["a": 42, "b": true] as [String : Any]
//
//let value18 = ["a": nil, "a": 42]


let str = "What a day"
let detailsStr = "Today is Monday; Status = \(str)"
print(detailsStr)

let digit: Int = 42
let detailsStr2 = "Favorite number: \(digit)"
print(detailsStr2)



let a = 42
let doubleA = Double(a)
let doubleA_2 = a as? Double



let floatNumber = 3.9
let intFraFloat = Int(3.9)



var position = (5, 4, z: 4)
position.z


print(position.1) // <-- prints 5






let http404Error = (404, "Not Found")
// http404Error is of type (Int, String), and equals (404, "Not Found")

let (_, error) = http404Error
//print("The status code is \(justStatusCode)")
print(error)

enum Class {
    case Teacher(name: String)
    case Student(name: String)
    case Macbook
}

let studentA = Class.Student(name: "Student A")
let teacherA = Class.Teacher(name: "Konstantin")

//...
var someone = teacherA


switch someone {
case .Student(let name):
    if name.count > 4 {
        print(name)
    }
default:
    print("Something strange")
}




//val a = if (hasGrade) 5.0 else 2.0
let hasGrade = !false //== true
let hasFinishedClass = false
let aaaa = hasGrade ? 5.0 : (hasFinishedClass ? 0.0 : 2.0)


let rem = 5 % 2

var aaaaaa = 2
aaaaaa = aaaaaa + 1
aaaaaa /= 1



let names = ["Anna", "Alex", "Brian", "Jack", "Joye"]
for i in {
    print(names[i])
}



let animals = ["Dog", "Cat", "Teacher", "Squirrel"]


for animal in animals {
    print("My #?????? favorite animal: \(animal)")
}

for i in 0..<animals.count {
    print("My #\(i + 1) favorite animal: \(animals[i])")
}

for i in animals.indices {
    print("My #\(i + 1) favorite animal: \(animals[i])")
}



func increment(value: Int, by n: Int) -> Int {
    return value + n
}

increment(value: 42, by: 5)