\uc2a4\ud504\ub808\ub4dc \uc5f0\uc0b0\uc790\ub97c \uc801\uc6a9\ud560 \uc218 \uc788\ub294 \ud074\ub798\uc2a4 AA\uac00 \uc788\ub2e4\uace0 \ud560\ub54c \ud65c\uc6a9 \uc608\ub294 \ub2e4\uc74c\uacfc \uac19\ub2e4.<\/p>\n
\r\nconst aa = new AA();\r\n\r\naa.addItem(1);\r\naa.addItem(2);\r\naa.addItem(3);\r\n\r\nconsole.log(...aa)\r\n<\/pre>\n\ucf58\uc194\uc5d0 1 2 3\uc774 \ucc0d\ud78c\ub2e4. \ubc14\ub85c … \uc5f0\uc0b0\uc790\uac00 \uc2a4\ud504\ub808\ub4dc \uc5f0\uc0b0\uc790\uc774\ub2e4. \uc774\ucc98\ub7fc \uc2a4\ud504\ub808\ub4dc \uc5f0\uc0b0\uc790\ub97c \uc801\uc6a9\ud560 \uc218 \uc788\ub3c4\ub85d \ud558\uae30 \uc704\ud574\uc11c AA \ud074\ub798\uc2a4\ub294 \ub2e4\uc74c\ucc98\ub7fc \uc791\uc131\ub418\uc5b4\uc57c \ud55c\ub2e4.<\/p>\n
\r\nclass AA {\r\n constructor() {\r\n this.items = []; \/\/ \uc774\ud130\ub7ec\ube14\ud55c \ub0b4\uc6a9\uc744 \uc800\uc7a5\ud560 \ubc30\uc5f4\r\n }\r\n\r\n \/\/ \uc544\uc774\ud15c\uc744 \ucd94\uac00\ud558\ub294 \uba54\uc18c\ub4dc\r\n addItem(item) {\r\n this.items.push(item);\r\n }\r\n\r\n \/\/ Symbol.iterator\ub97c \uad6c\ud604\ud558\uc5ec \uc774\ud130\ub7ec\ube14\ud558\uac8c \ub9cc\ub4ed\ub2c8\ub2e4.\r\n [Symbol.iterator]() {\r\n let index = 0;\r\n let data = this.items;\r\n return {\r\n next: () => {\r\n if (index < data.length) {\r\n return { value: data[index++], done: false };\r\n } else {\r\n return { done: true };\r\n }\r\n }\r\n };\r\n }\r\n}\r\n<\/pre>\n\ucc38\uace0\ub85c \uc2a4\ud504\ub808\ub4dc \uc5f0\uc0b0\uc790\ub294 \ub9e4\uc6b0 \uc720\uc6a9\ud55c \ubb38\ubc95\uc73c\ub85c, \ubc30\uc5f4\uc774\ub098 \uc774\ud130\ub7ec\ube14 \uac1d\uccb4\uc758 \uc694\uc18c\ub97c \uac1c\ubcc4 \uc694\uc18c\ub85c \ud655\uc7a5\ud558\uac70\ub098, \ud568\uc218 \ud638\ucd9c \uc2dc \uc778\uc218\ub85c \uc0ac\uc6a9\ud558\uac70\ub098, \uac1d\uccb4 \ub9ac\ud130\ub7f4\uc5d0\uc11c \uc18d\uc131\uc744 \ubcf5\uc0ac\ud560 \ub54c \uc0ac\uc6a9\ub41c\ub2e4. \uc608\ub97c\ub4e4\uc5b4 \uc544\ub798\uc758 \ucf54\ub4dc\uc758 \uc608\uc2dc\uac00 \uc788\ub2e4.<\/p>\n
\uc0ac\ub8401<\/p>\n
\r\nlet arr1 = [1, 2, 3];\r\nlet arr2 = [...arr1, 4, 5]; \/\/ [1, 2, 3, 4, 5]\r\n<\/pre>\n\uc0ac\ub8402<\/p>\n
\r\nfunction sum(x, y, z) {\r\n return x + y + z;\r\n}\r\n\r\nlet numbers = [1, 2, 3];\r\nconsole.log(sum(...numbers)); \/\/ 6\r\n<\/pre>\n\uc0ac\ub8403<\/p>\n
\r\nlet obj1 = { foo: 'bar', x: 42 };\r\nlet obj2 = { ...obj1, y: 1337 }; \/\/ { foo: 'bar', x: 42, y: 1337 }\r\n<\/pre>\n\uc2a4\ud504\ub808\ub4dc \uc5f0\uc0b0\uc790\ub294 \uc595\uc740 \ubcf5\uc0ac\ub97c \uc218\ud589\ud55c\ub2e4\ub294 \uc810\uc744 \uc720\ub150\ud558\uc790. \uc704\uc758 \uc608\uc81c\ub97c \ubcf4\uba74 \uc54c\uaca0\uc9c0\ub9cc \uc2a4\ud504\ub808\ub4dc \uc5f0\uc0b0\uc790\ub294 \ucf54\ub4dc\ub97c \ub354\uc6b1 \uac04\uacb0\ud558\uace0 \uac00\ub3c5\uc131\uc744 \ub192\uc5ec\uc8fc\uba70 \ub370\uc774\ud130 \uad6c\uc870\ub97c \uc27d\uac8c \uc870\uc791\ud560 \uc218 \uc788\uac8c \ud574\uc900\ub2e4. \ud558\uc9c0\ub9cc \uc595\uc740 \ubcf5\uc0ac\ub77c\ub294 \uc810\uc744 \ub2e4\uc2dc \ud55c\ubc88 \ub354 \uc720\ub150\ud558\uc790.<\/p>\n","protected":false},"excerpt":{"rendered":"
\uc2a4\ud504\ub808\ub4dc \uc5f0\uc0b0\uc790\ub97c \uc801\uc6a9\ud560 \uc218 \uc788\ub294 \ud074\ub798\uc2a4 AA\uac00 \uc788\ub2e4\uace0 \ud560\ub54c \ud65c\uc6a9 \uc608\ub294 \ub2e4\uc74c\uacfc \uac19\ub2e4. const aa = new AA(); aa.addItem(1); aa.addItem(2); aa.addItem(3); console.log(…aa) \ucf58\uc194\uc5d0 1 2 3\uc774 \ucc0d\ud78c\ub2e4. \ubc14\ub85c … \uc5f0\uc0b0\uc790\uac00 \uc2a4\ud504\ub808\ub4dc \uc5f0\uc0b0\uc790\uc774\ub2e4. \uc774\ucc98\ub7fc \uc2a4\ud504\ub808\ub4dc \uc5f0\uc0b0\uc790\ub97c \uc801\uc6a9\ud560 \uc218 \uc788\ub3c4\ub85d \ud558\uae30 \uc704\ud574\uc11c AA \ud074\ub798\uc2a4\ub294 \ub2e4\uc74c\ucc98\ub7fc \uc791\uc131\ub418\uc5b4\uc57c \ud55c\ub2e4. class AA { constructor() { this.items = []; \/\/ \uc774\ud130\ub7ec\ube14\ud55c … <\/p>\n