코드 로그 입니다.


//Day 1


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


import UIKit


//Simple Values

//decraring variables

var str = "Hello, playground"

let implictInteger = 80

let explicit:Double = 80

let explicit1: Float = 80


let label = "the width is"

let width = 83

let widthLabel = label + String(width)


print("hello world")


let apples = 3

let oranges = 4


let applesSummary = "I have \(8.0) apples"

let fruitSummary = "I have \(8.0 + 10.0) pieces of fruit"


//array and dictionary

var shoppingList = ["catfish", "water", "tulips", "blue paint"]

shoppingList[1] = "bottle of water"


var occupations = [

    "Malcolm" : "Captain",

    "Kaylee" : "Mechanic",

]

occupations["Jayne"] = "Public Relations"


let emptyArray = [String]()

let emptyDictionary = [String:Float]()


//Control Flow

//for loop & if else

let individualScores = [12, 14, 25, 34, 134]

var teamScore = 0

for score in individualScores {

    if score > 30 {

        teamScore+=3

    } else {

        teamScore+=1

    }

}

print(teamScore)


//optional variable

var optionalString: String? = "Hello"

print(optionalString == nil)

var optionalName: String? = "John Appleseed"

var greeting = "Hello!"


if let name = optionalName {

    greeting = "hello, \(name)"

}


let nickName: String? = nil

let fullName: String = "John Appleseed"

let informalGreeting = "Hi \(nickName ?? fullName)"


//switch

let vegetable = "red pepper"

switch vegetable{

case "celery":

    print("wawa")

case "cucumber", "watercress":

    print("wwwwww")

case let x where x.hasSuffix("pepper"):

    print("wow found red pepper")

default:

    print("default")

}


//dictionary

let interestingNumbers = [

    "prime":[2,3,5,7,11,13],

    "fibonacci":[1,1,2,3,5,8],

    "square":[1,4,9,16,25],

]


var largest = 0


for (kind, numbers) in interestingNumbers {

    for number in numbers {

        if number > largest {

            largest = number

        }

        print(kind + ":" + String(largest))

    }

}

print(largest)



//while

var n=2

while n<100 {

    n *= 2

}

print(n)


var m = 2

repeat {

    m *= 2

} while m < 100


print (m)


// range

var total = 0


// .. vs =< ...

for i in 0..<4 {

    total += i

    print (total)

}

print (total)


//function and Closure

//function

func greet(person: String, day: String) -> String {

    return "Hello \(person), Today is \(day)."

}

greet(person: "Bob", day: "Friday")


func greetWithSpecial(person: String, special: String)->String{

    return "Hello \(person), Today's Lunch Special is \(special)."

}

greetWithSpecial(person: "Mike", special: "Meat Balls")


// _ <-- 추가 하여 함수 호출 시 argument label 를 쓰지 않게 한다.

func greet(_ person: String, day: String) -> String {

    return "Hello \(person), Today is \(day)."

}

greet("Sam", day: "Saturday")



//tuple , returns multiple results

func calculateStatistics(scores:[Int]) -> (min: Int, max: Int, sum: Int){

    var min = scores[0]

    var max = scores[0]

    var sum = 0

    

    for score in scores {

        

        if score > max {

            max = score

        } else if score < min {

            min = score

        }

        sum += score

    }

    return (min, max, sum)

}


let statistics = calculateStatistics(scores: [1,2,3,4,5,6,7,8,9,10])

print(statistics.min)

print(statistics.max)

print(statistics.sum)

print(statistics.0)

print(statistics.1)

print(statistics.2)


func sumOf(numbers: Int...)-> Int {

    var sum = 0

    for number in numbers {

        sum += number

    }

    return sum

}


sumOf()

sumOf(numbers: 1,2,3,4,5,6,7,8,9,10)


//experiment

func averageOf(numbers: Double...)-> Double{

    var average : Double = 0.0

    var counter : Double = 0.0

    var sum : Double = 0.0

    

    for number in numbers {

        sum += number

        counter += 1.0

    }

    if counter != 0.0 {

        average = sum / counter

    } else {

        average = 0.0

    }

    

    print("Sum = \(sum)")

    print("counter = \(counter)")

        

    return average

}


averageOf()

averageOf(numbers: 1,2,3,4,5,6,7,8,9,10)


func returnFifteen() -> Int{

    var y = 10

    

    func add(){

        y+=5

    }

    add()

    return y

}


returnFifteen()


저작자 표시 비영리 변경 금지
신고

'초짜 IT보이 서바이벌 스토리 > iOS - swift' 카테고리의 다른 글

[swift] day 1 code log  (0) 2017.09.22
[swift] #SWIFT #4 언어 가이드  (0) 2017.09.22
[swift] push notification  (0) 2014.06.25

posted by youp_han matrim



티스토리 툴바