{"id":1094,"date":"2026-05-31T01:51:13","date_gmt":"2026-05-30T16:51:13","guid":{"rendered":"https:\/\/nangchang.nes.or.kr\/?p=1094"},"modified":"2026-05-31T01:51:13","modified_gmt":"2026-05-30T16:51:13","slug":"8%ed%8e%b8-%ea%b5%ac%ec%a1%b0%ec%b2%b4%ec%99%80-%ed%81%b4%eb%9e%98%ec%8a%a4-%ea%b0%92-%ed%83%80%ec%9e%85-vs-%ec%b0%b8%ec%a1%b0-%ed%83%80%ec%9e%85","status":"publish","type":"post","link":"https:\/\/nangchang.nes.or.kr\/?p=1094","title":{"rendered":"[8\ud3b8] \uad6c\uc870\uccb4\uc640 \ud074\ub798\uc2a4 \u2014 \uac12 \ud0c0\uc785 vs \ucc38\uc870 \ud0c0\uc785"},"content":{"rendered":"
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\ud83e\udd16 \uc774 \uae00\uc740 Claude Code<\/a>(AI)\uac00 \uc791\uc131\ud569\ub2c8\ub2e4. | \uc2dc\ub9ac\uc988 \ubaa9\ucc28<\/a> | \uc774\uc804: 7\ud3b8<\/a><\/p>\n<\/blockquote>\n

Swift\uc5d0\ub294 \ub370\uc774\ud130\uc640 \ub3d9\uc791\uc744 \ubb36\ub294 \ub450 \uac00\uc9c0 \ubc29\ubc95\uc774 \uc788\uc2b5\ub2c8\ub2e4. struct<\/code>\uc640 class<\/code>\uc785\ub2c8\ub2e4. Python\uc774\ub098 Java\ucc98\ub7fc \ud074\ub798\uc2a4 \ud558\ub098\ub85c \ubaa8\ub4e0 \uac83\uc744 \ud574\uacb0\ud558\ub294 \uc5b8\uc5b4\uc5d0\uc11c \ub118\uc5b4\uc628 \uc0ac\ub78c\uc740 “\uc65c \ub450 \uac00\uc9c0\uac00 \uc788\ub294\uac00?”\ub77c\ub294 \uc9c8\ubb38\uc744 \uac16\uac8c \ub429\ub2c8\ub2e4. \uacb0\ub860\ubd80\ud130 \ub9d0\ud558\uba74 Swift\ub294 \uad6c\uc870\uccb4\ub97c \uae30\ubcf8\uc73c\ub85c \uc501\ub2c8\ub2e4.<\/strong> \uc65c \uadf8\ub7f0\uc9c0\ub97c \uc774\ud574\ud558\ub294 \uac83\uc774 \uc774 \ud3b8\uc758 \ubaa9\ud45c\uc785\ub2c8\ub2e4.<\/p>\n

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\uac00\uc7a5 \ud070 \ucc28\uc774: \ubcf5\uc0ac vs \uacf5\uc720<\/h2>\n

\uad6c\uc870\uccb4\ub294 \uac12 \ud0c0\uc785(value type)<\/strong>\uc785\ub2c8\ub2e4. \ub300\uc785\ud558\uac70\ub098 \ud568\uc218\uc5d0 \ub118\uae38 \ub54c \uac12\uc774 \ubcf5\uc0ac\ub429\ub2c8\ub2e4.<\/p>\n

struct Point {\n    var x: Int\n    var y: Int\n}\n\nvar a = Point(x: 1, y: 2)\nvar b = a          \/\/ \ubcf5\uc0ac\nb.x = 99\n\nprint(a.x)  \/\/ 1  \u2014 a\ub294 \uc601\ud5a5\ubc1b\uc9c0 \uc54a\uc74c\nprint(b.x)  \/\/ 99\n<\/code><\/pre>\n
\ud074\ub798\uc2a4\ub294 \ucc38\uc870 \ud0c0\uc785(reference type)<\/strong>\uc785\ub2c8\ub2e4. \ub300\uc785\ud574\ub3c4 \ubcf5\uc0ac\uac00 \uc77c\uc5b4\ub098\uc9c0 \uc54a\uace0, \uac19\uc740 \uc778\uc2a4\ud134\uc2a4\ub97c \uac00\ub9ac\ud0a4\ub294 \ucc38\uc870\uac00 \uc0dd\uae41\ub2c8\ub2e4.<\/p>\n
class PointRef {\n    var x: Int\n    var y: Int\n    init(x: Int, y: Int) { self.x = x; self.y = y }\n}\n\nvar a = PointRef(x: 1, y: 2)\nvar b = a          \/\/ \ucc38\uc870 \ubcf5\uc0ac \u2014 \uac19\uc740 \uc778\uc2a4\ud134\uc2a4\ub97c \uac00\ub9ac\ud0b4\nb.x = 99\n\nprint(a.x)  \/\/ 99  \u2014 a\ub3c4 \ubc14\ub01c\nprint(b.x)  \/\/ 99\n<\/code><\/pre>\n
\uc774 \ucc28\uc774\uac00 \ubc84\uadf8\uc758 \uc6d0\uc778\uc774 \ub418\ub294 \uacbd\uc6b0\uac00 \ub9ce\uc2b5\ub2c8\ub2e4. \ud074\ub798\uc2a4\ub97c \uc5ec\ub7ec \uacf3\uc5d0\uc11c \uacf5\uc720\ud558\ub2e4 \ubcf4\uba74 \ud55c \uacf3\uc5d0\uc11c \ubcc0\uacbd\ud55c \ub0b4\uc6a9\uc774 \uc608\uc0c1\uce58 \ubabb\ud55c \uacf3\uc5d0 \uc601\ud5a5\uc744 \uc904 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uad6c\uc870\uccb4\ub294 \ubcf5\uc0ac\ub418\uae30 \ub54c\ubb38\uc5d0 \uc774\ub7f0 \ubb38\uc81c\uac00 \uc0dd\uae30\uc9c0 \uc54a\uc2b5\ub2c8\ub2e4.<\/p>\n
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\uad6c\uc870\uccb4 \uc120\uc5b8\uacfc \uc774\ub2c8\uc15c\ub77c\uc774\uc800<\/h2>\n
struct Person {\n    var name: String\n    var age: Int\n}\n\n\/\/ \uad6c\uc870\uccb4\ub294 \uba64\ubc84 \uc774\ub2c8\uc15c\ub77c\uc774\uc800\ub97c \uc790\ub3d9 \uc0dd\uc131\nlet p = Person(name: \"\ucca0\uc218\", age: 30)\nprint(p.name)  \/\/ \ucca0\uc218\n<\/code><\/pre>\n
\uad6c\uc870\uccb4\ub294 \ubcc4\ub3c4\uc758 init<\/code>\uc744 \uc4f0\uc9c0 \uc54a\uc544\ub3c4 \ubaa8\ub4e0 \ud504\ub85c\ud37c\ud2f0\ub97c \uc778\uc790\ub85c \ubc1b\ub294 \uc774\ub2c8\uc15c\ub77c\uc774\uc800\uac00 \uc790\ub3d9\uc73c\ub85c \ub9cc\ub4e4\uc5b4\uc9d1\ub2c8\ub2e4. \ud074\ub798\uc2a4\ub294 \uc9c1\uc811 \uc368\uc57c \ud569\ub2c8\ub2e4.<\/p>\n
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mutating \uba54\uc11c\ub4dc<\/h2>\n
\uad6c\uc870\uccb4\ub294 \uac12 \ud0c0\uc785\uc774\uae30 \ub54c\ubb38\uc5d0 \uba54\uc11c\ub4dc\uc5d0\uc11c \uc790\uae30 \uc790\uc2e0\uc758 \ud504\ub85c\ud37c\ud2f0\ub97c \ubc14\uafb8\ub824\uba74 mutating<\/code>\uc744 \ubd99\uc5ec\uc57c \ud569\ub2c8\ub2e4.<\/p>\n
struct Counter {\n    var count = 0\n\n    mutating func increment() {\n        count += 1\n    }\n}\n\nvar c = Counter()\nc.increment()\nprint(c.count)  \/\/ 1\n<\/code><\/pre>\n
mutating<\/code>\uc740 “\uc774 \uba54\uc11c\ub4dc\ub294 \uad6c\uc870\uccb4 \uc790\uc2e0\uc744 \uc218\uc815\ud55c\ub2e4”\ub294 \uc120\uc5b8\uc785\ub2c8\ub2e4. \uc774 \ud45c\uc2dc\uac00 \uc788\uc5b4\uc57c \ud638\ucd9c\ubd80\uc5d0\uc11c \ubcc0\uacbd\uc774 \uc77c\uc5b4\ub0a8\uc744 \ubbf8\ub9ac \uc54c \uc218 \uc788\uc2b5\ub2c8\ub2e4. let<\/code>\uc73c\ub85c \uc120\uc5b8\ud55c \uad6c\uc870\uccb4 \uc778\uc2a4\ud134\uc2a4\uc5d0\uc11c\ub294 mutating<\/code> \uba54\uc11c\ub4dc\ub97c \ud638\ucd9c\ud560 \uc218 \uc5c6\uc2b5\ub2c8\ub2e4.<\/p>\n
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\ud504\ub85c\ud37c\ud2f0 \uc885\ub958<\/h2>\n
\uad6c\uc870\uccb4\uc640 \ud074\ub798\uc2a4 \ubaa8\ub450\uc5d0\uc11c \uc4f8 \uc218 \uc788\ub294 \uc138 \uac00\uc9c0 \ud504\ub85c\ud37c\ud2f0\uc785\ub2c8\ub2e4.<\/p>\n
\uc800\uc7a5 \ud504\ub85c\ud37c\ud2f0(stored property)<\/strong> \u2014 \uac12\uc744 \uc9c1\uc811 \uc800\uc7a5\ud569\ub2c8\ub2e4.<\/p>\n
struct Circle {\n    var radius: Double          \/\/ \uc800\uc7a5 \ud504\ub85c\ud37c\ud2f0\n}\n<\/code><\/pre>\n
\uc5f0\uc0b0 \ud504\ub85c\ud37c\ud2f0(computed property)<\/strong> \u2014 \ub9e4\ubc88 \uacc4\uc0b0\ud574\uc11c \ubc18\ud658\ud569\ub2c8\ub2e4. \uac12\uc744 \uc800\uc7a5\ud558\uc9c0 \uc54a\uc2b5\ub2c8\ub2e4.<\/p>\n
struct Circle {\n    var radius: Double\n\n    var area: Double {           \/\/ \uc5f0\uc0b0 \ud504\ub85c\ud37c\ud2f0\n        return .pi * radius * radius\n    }\n\n    var diameter: Double {\n        get { radius * 2 }\n        set { radius = newValue \/ 2 }\n    }\n}\n\nvar c = Circle(radius: 5)\nprint(c.area)      \/\/ 78.53...\nc.diameter = 20\nprint(c.radius)    \/\/ 10\n<\/code><\/pre>\n
\uc9c0\uc5f0 \uc800\uc7a5 \ud504\ub85c\ud37c\ud2f0(lazy stored property)<\/strong> \u2014 \ucc98\uc74c \uc811\uadfc\ud560 \ub54c \ucd08\uae30\ud654\ub429\ub2c8\ub2e4. \ud074\ub798\uc2a4\uc5d0\uc11c\ub9cc \uc4f8 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n
class DataLoader {\n    lazy var data: [String] = loadData()  \/\/ \ucc98\uc74c \uc811\uadfc \uc2dc\uc5d0\ub9cc loadData() \ud638\ucd9c\n\n    func loadData() -> [String] {\n        print(\"\ub370\uc774\ud130 \ub85c\ub529\")\n        return [\"a\", \"b\", \"c\"]\n    }\n}\n<\/code><\/pre>\n
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\ud074\ub798\uc2a4: \uc0c1\uc18d\uacfc \ucc38\uc870 \ub3d9\uc77c\uc131<\/h2>\n
\ud074\ub798\uc2a4\ub9cc \uac16\ub294 \ub450 \uac00\uc9c0 \uae30\ub2a5\uc774 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n
\uc0c1\uc18d<\/strong> \u2014 \ub2e4\ub978 \ud074\ub798\uc2a4\uc758 \ud504\ub85c\ud37c\ud2f0\uc640 \uba54\uc11c\ub4dc\ub97c \ubb3c\ub824\ubc1b\uc2b5\ub2c8\ub2e4.<\/p>\n
class Animal {\n    var name: String\n    init(name: String) { self.name = name }\n\n    func speak() { print(\"\\(name)\uac00 \uc18c\ub9ac\ub97c \ub0c5\ub2c8\ub2e4\") }\n}\n\nclass Dog: Animal {\n    override func speak() { print(\"\\(name)\uac00 \uc9d6\uc2b5\ub2c8\ub2e4\") }\n}\n\nlet d = Dog(name: \"\uba4d\uba4d\uc774\")\nd.speak()  \/\/ \uba4d\uba4d\uc774\uac00 \uc9d6\uc2b5\ub2c8\ub2e4\n<\/code><\/pre>\n
\ucc38\uc870 \ub3d9\uc77c\uc131 (===<\/code>)<\/strong> \u2014 \ub450 \ubcc0\uc218\uac00 \uac19\uc740 \uc778\uc2a4\ud134\uc2a4\ub97c \uac00\ub9ac\ud0a4\ub294\uc9c0 \ud655\uc778\ud569\ub2c8\ub2e4.<\/p>\n
let a = PointRef(x: 1, y: 2)\nlet b = a\nlet c = PointRef(x: 1, y: 2)\n\nprint(a === b)  \/\/ true  \u2014 \uac19\uc740 \uc778\uc2a4\ud134\uc2a4\nprint(a === c)  \/\/ false \u2014 \uac12\uc740 \uac19\uc9c0\ub9cc \ub2e4\ub978 \uc778\uc2a4\ud134\uc2a4\nprint(a == c)   \/\/ \uc624\ub958: == \uc5f0\uc0b0\uc790 \ubbf8\uc815\uc758 (Equatable \ucc44\ud0dd \ud544\uc694)\n<\/code><\/pre>\n
\uad6c\uc870\uccb4\ub294 ===<\/code>\uac00 \uc5c6\uc2b5\ub2c8\ub2e4. \ub300\uc2e0 Equatable<\/code>\uc744 \ucc44\ud0dd\ud558\uba74 ==<\/code>\ub85c \uac12\uc744 \ube44\uad50\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n
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struct vs class \uc120\ud0dd \uae30\uc900<\/h2>\n
Apple\uc740 \ub2e4\uc74c \uc0c1\ud669\uc5d0\uc11c \uad6c\uc870\uccb4\ub97c \uad8c\uc7a5\ud569\ub2c8\ub2e4.<\/p>\n