[문법요약] 배열, Set(집합), 딕셔너리(Dictionary)

- 배열, Set(집합), 딕셔너리(Dictionary) 

import UIKit

// Array
var nameArray: [String] = ["김석진", "정호석", "김남준", "김남준", "박지민", "전정국", "민윤기"]
var nameArray2: Array<String> = ["김석진", "정호석", "김남준", "김남준", "박지민", "전정국", "민윤기"]

nameArray.append("김석진")
nameArray.append("정호석")
nameArray.append("김남준")
nameArray.insert("김태형", at: 1)

nameArray.remove(at: 3)
print(nameArray)

nameArray[0]
nameArray[1] = "공유"
nameArray[2]
nameArray[3]

nameArray.removeAll()
print(nameArray)
nameArray.count
let nameArray3 = nameArray + nameArray2
nameArray3.count

// Set(집합)
var genreArray: Set<String> = ["방탄소년단", "아이유", "소유"]
var genreArray2: Set<String> = ["방탄소년단", "아이유", "소유", "R&B"]

genreArray.insert("클래식")
genreArray.insert("클래식")
genreArray.insert("클래식")
genreArray2.insert("RM")
genreArray.remove("클래식")
genreArray.removeAll()
genreArray

genreArray.intersection(genreArray2)    // 교집합
genreArray.union(genreArray2)           // 합집합
genreArray2.subtract(genreArray)        // genreArray2 - genreArray

// 딕셔너리(Dictionary)
var capitalDic: [String: String] = ["KR": "서울", "GB": "런던", "US": "워싱턴"]
var capitalDic2: Dictionary<String, String> = ["KR": "서울", "GB": "런던", "US": "워싱턴"]
capitalDic["CN"] = "베이징"

//capitalDic.removeValue(forKey: "US")
capitalDic["CN"] = nil

//capitalDic.removeAll()

for capitalInfo in capitalDic {
    print(capitalInfo)
}

for key in capitalDic.keys.sorted() {
    print(key)
}

for value in capitalDic.values.sorted() {
    print(value)
}