๐Ÿฅ Swift ๋ฌธ๋ฒ• ์ต์ˆ™ํ•ด์ง€๊ธฐ

Burkeyยท2024๋…„ 1์›” 27์ผ
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์ฐจ๊ทผ์ฐจ๊ทผ Swift

๋ชฉ๋ก ๋ณด๊ธฐ
15/15

์˜ค๋Š˜์€ ๊ฐ•์˜๋ฅผ ๋“ค์œผ๋ฉด์„œ ์Šค์œ„ํ”„ํŠธ ๊ธฐ๋ณธ ๋ฌธ๋ฒ• ๋”•์…”๋„ˆ๋ฆฌ์™€ ์„ธํŠธ์— ๋Œ€ํ•˜์—ฌ ๊ณต๋ถ€ํ•˜์˜€์Šต๋‹ˆ๋‹ค.

์„ ์–ธ

// ๋”•์…”๋„ˆ๋ฆฌ์˜ ์„ ์–ธ ๋ฐฉ์‹
var dict1 : Dictionary<String, Any> = ["a" : 123, "b" : "abc", "c" : true]
//		   ๋”•์…”๋„ˆ๋ฆฌ    <ํ‚ค ํƒ€์ž…, ๊ฐ’ ํƒ€์ž…>  			

// dict -> []

// ๋‹ค๋ฅธ ์„ ์–ธ ๋ฐฉ๋ฒ•
var dict2 : Dictionary<String, Any> = [:]
var dict3 : Dictionary<String, Int> = [String :Int]()

// ์„ธํŠธ ์„ ์–ธ ๋ฐฉ์‹
var set1 : Set<Int> = Set<Int>()
var set2 : Set<Int> = []
var set3 : Set<Int> = [1, 2, 3]

์ถ”๊ฐ€

๋”•์…”๋„ˆ๋ฆฌ

var dict : Dictionary<String, Int> = [:] // ์•„๋ฌด๊ฒƒ๋„ ์—†๋Š” ๋”•์…”๋„ˆ๋ฆฌ ์„ ์–ธ

dict["a"] = 1
dict["b"] = 2

// dict ["a" : 1, "b" : 2]

์„ธํŠธ

var set : Set<Int> = []

set.insert(1)
set.insert(2)
set.insert(3)
set.insert(1) // ์ด์ „์— ๋„ฃ์€ ๊ฐ’์ด๋ž‘ ๋™์ผํ•˜๋ฉด ๋“ค์–ด๊ฐ€์ง€ ์•Š๋Š”๋‹ค.

// [1, 2, 3]

์ œ๊ฑฐ

๋”•์…”๋„ˆ๋ฆฌ

var dict : Dictionary<String, Any> = ["a" : 123, "b" : "abc", "c" : true]

dict["b"] = nil 
// [ "a" : 123, "c" : true ]
dict.removeValue(forKey: "a") // "a"ํ‚ค์™€ ์Œ์„ ์ด๋ฃจ๋Š” ๊ฐ’ ์‚ญ์ œ
// [ "c" : true ]

dict.removeAll() // ๋ชจ๋‘ ์‚ญ์ œ ๋นˆ ๋”•์…”๋„ˆ๋ฆฌ๋กœ ๋งŒ๋“ฌ
// [] 

์„ธํŠธ

var set : Set<Int> = [1, 2, 3]

set.remove(1)
// [2, 3]

set.removeFirst() // ์ฒ˜์Œ ๊ฐ’ ์‚ญ์ œ
// [3]

๊ทธ์™ธ ๋ฉ”์†Œ๋“œ

๋”•์…”๋„ˆ๋ฆฌ

var dict : Dictionary<String, Int> = ["a" : 123, "b" : 12, "c" : 333]

dict.keys // key๊ฐ’๋“ค๋งŒ ์ถ”์ถœ ["a", "b", "c" ]

dict.values // ๊ฐ’๋“ค๋งŒ ์ถ”์ถœ [123, 12, 333]

dict.updateValue(0 , forKey: "a") // ์›ํ•˜๋Š” ํ‚ค๊ฐ’์˜ ๊ฐ’์„ ๋ณ€๊ฒฝ
// dict["a"] = 0 ๊ณผ ๋™์ผ
// ["a" : 0, "b" : 12, "c" : 333]

์„ธํŠธ

var set1 : Set<Int> = [1, 2, 3, 5, 6]
var set2 : Set<Int> = [5, 99, -2, 1, 2]

let unionSet = set1.union(set2) // ๋‘๊ฐœ์˜ ์„ธํŠธ๋ฅผ ๊ฒฐํ•ฉ
let setInter = set1.intersection(set2) // ๊ต์ง‘ํ•ฉ 
// ๋‘ ๊ฐœ์˜ ์„ธํŠธ๋ฅผ ๋น„๊ตํ•˜์—ฌ ๋™์ผํ•œ ๊ฐ’๋“ค์„ ๊ฐ€์ง„๊ฒƒ๋“ค๋งŒ ๋ฆฌํ„ด
let setSub = set1.subtracting(set2) // ์ฐจ์ง‘ํ•ฉ 
// ๋‘ ๊ฐœ์˜ ์„ธํŠธ๋ฅผ ๋น„๊ตํ•˜์—ฌ ๋™์ผํ•œ ๊ฐ’๋“ค์„(๊ต์ง‘ํ•ฉ) ์ œ์™ธํ•œ ๊ฐ’๋“ค๋งŒ ๋ฆฌํ„ด

let sortedSet = set2.sorted() // ์„ธํŠธ์˜ ๊ฐ’๋“ค์„ ์ •๋ ฌ
// [ -2, 1, 2, 5, 99 ]
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