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)