{"id":25946,"date":"2024-10-27T06:48:41","date_gmt":"2024-10-27T06:48:41","guid":{"rendered":"http:\/\/atmokpo.com\/w\/?p=25946"},"modified":"2024-11-26T07:49:34","modified_gmt":"2024-11-26T07:49:34","slug":"%eb%a6%ac%ec%95%a1%ed%8a%b8-%ea%b0%95%ec%a2%8c-%ec%8a%a4%ed%94%84%eb%a0%88%eb%93%9c-%ec%97%b0%ec%82%b0%ec%9e%90%ec%99%80-rest-%eb%a7%a4%ea%b0%9c%eb%b3%80%ec%88%98","status":"publish","type":"post","link":"https:\/\/atmokpo.com\/w\/25946\/","title":{"rendered":"\ub9ac\uc561\ud2b8 \uac15\uc88c: \uc2a4\ud504\ub808\ub4dc \uc5f0\uc0b0\uc790\uc640 Rest \ub9e4\uac1c\ubcc0\uc218"},"content":{"rendered":"

<\/p>\n

\ub9ac\uc561\ud2b8\ub294 JavaScript \ub77c\uc774\ube0c\ub7ec\ub9ac\ub85c, \ud074\ub77c\uc774\uc5b8\ud2b8 \uce21\uc5d0\uc11c \uc0ac\uc6a9\uc790 \uc778\ud130\ud398\uc774\uc2a4\ub97c \uad6c\ucd95\ud560 \ub54c \ub110\ub9ac \uc0ac\uc6a9\ub429\ub2c8\ub2e4. JavaScript\uc758 \uace0\uae09 \uae30\ub2a5\uc744 \ud65c\uc6a9\ud558\uba74 \ub354\uc6b1 \ud6a8\uc728\uc801\uc774\uace0 \uc720\uc9c0 \ubcf4\uc218\ud558\uae30 \uc26c\uc6b4 \ucf54\ub4dc\ub97c \uc791\uc131\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc774\ubc88 \uae00\uc5d0\uc11c\ub294 JavaScript\uc758 \uc2a4\ud504\ub808\ub4dc \uc5f0\uc0b0\uc790<\/strong>(…)\uc640 Rest \ub9e4\uac1c\ubcc0\uc218<\/strong>(…)\uc758 \uac1c\ub150\uc744 \ub2e4\ub8e8\uace0, \uc774 \ub450 \uac00\uc9c0\ub97c \ub9ac\uc561\ud2b8 \ucef4\ud3ec\ub10c\ud2b8\uc5d0\uc11c \uc5b4\ub5bb\uac8c \ud65c\uc6a9\ud560 \uc218 \uc788\ub294\uc9c0\ub97c \uc124\uba85\ud558\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n

1. \uc2a4\ud504\ub808\ub4dc \uc5f0\uc0b0\uc790(Spread Operator)<\/h2>\n

\uc2a4\ud504\ub808\ub4dc \uc5f0\uc0b0\uc790\ub294 \ubc30\uc5f4\uc774\ub098 \uac1d\uccb4\uc758 \ubaa8\ub4e0 \uc694\uc18c\ub97c \uac1c\ubcc4\uc801\uc73c\ub85c \ud3bc\uce58\ub294 \ub370 \uc0ac\uc6a9\ub429\ub2c8\ub2e4. ES6\uc5d0\uc11c \ub3c4\uc785\ub41c \uc774 \uad6c\ubb38\uc740 \ucf54\ub4dc\uc758 \uac00\ub3c5\uc131\uc744 \ub192\uc774\uace0, \uac04\ud3b8\ud55c \ub370\uc774\ud130 \uc870\uc791\uc744 \uac00\ub2a5\ud558\uac8c \ud569\ub2c8\ub2e4.<\/p>\n

1.1 \ubc30\uc5f4\uc5d0\uc11c\uc758 \uc2a4\ud504\ub808\ub4dc \uc5f0\uc0b0\uc790<\/h3>\n

\uc2a4\ud504\ub808\ub4dc \uc5f0\uc0b0\uc790\ub294 \ubc30\uc5f4\uc758 \ubcf5\uc0ac, \uacb0\ud569, \ub610\ub294 \uc694\uc18c \ucd94\uac00\uc5d0 \ud65c\uc6a9\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc544\ub798\uc758 \uc608\uc81c\ub97c \ud1b5\ud574 \uc54c\uc544\ubcf4\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n

const arr1 = [1, 2, 3];\nconst arr2 = [4, 5, 6];\n\n\/\/ \ubc30\uc5f4 \ubcf5\uc0ac\nconst arrCopy = [...arr1];\n\n\/\/ \ubc30\uc5f4 \uacb0\ud569\nconst combinedArr = [...arr1, ...arr2];\n\n\/\/ \ubc30\uc5f4\uc5d0 \uc694\uc18c \ucd94\uac00\nconst newArr = [...arr1, 0, ...arr2];\n<\/code><\/pre>\n
1.2 \uac1d\uccb4\uc5d0\uc11c\uc758 \uc2a4\ud504\ub808\ub4dc \uc5f0\uc0b0\uc790<\/h3>\n
\uac1d\uccb4\uc5d0\uc11c\ub3c4 \ub9c8\ucc2c\uac00\uc9c0\ub85c \uc0ac\uc6a9\ub429\ub2c8\ub2e4. \uac1d\uccb4\uc758 \ubcf5\uc0ac, \uacb0\ud569 \ubc0f \uc218\uc815\uc774 \uac00\ub2a5\ud569\ub2c8\ub2e4.<\/p>\n
const obj1 = { a: 1, b: 2 };\nconst obj2 = { c: 3, d: 4 };\n\n\/\/ \uac1d\uccb4 \ubcf5\uc0ac\nconst objCopy = { ...obj1 };\n\n\/\/ \uac1d\uccb4 \uacb0\ud569\nconst combinedObj = { ...obj1, ...obj2 };\n\n\/\/ \uac1d\uccb4 \uc218\uc815\nconst modifiedObj = { ...obj1, b: 5 };\n<\/code><\/pre>\n
2. Rest \ub9e4\uac1c\ubcc0\uc218 (Rest Parameters)<\/h2>\n
Rest \ub9e4\uac1c\ubcc0\uc218\ub294 \ud568\uc218\uc758 \ub9e4\uac1c\ubcc0\uc218 \ubaa9\ub85d\uc5d0 \uc0ac\uc6a9\ud558\ub294 \ud615\ud0dc\ub85c, \uc5ec\ub7ec \uac1c\uc758 \uc778\uc218\ub97c \ubc30\uc5f4\ub85c \ubb36\uc5b4\uc8fc\ub294 \uc5ed\ud560\uc744 \ud569\ub2c8\ub2e4. \uc774\ub294 \ud2b9\ud788 \ub9e4\uac1c\ubcc0\uc218\uc758 \uac1c\uc218\uac00 \uc815\ud574\uc9c0\uc9c0 \uc54a\uc740 \uacbd\uc6b0 \uc720\uc6a9\ud569\ub2c8\ub2e4.<\/p>\n
2.1 Rest \ub9e4\uac1c\ubcc0\uc218\uc758 \uae30\ubcf8 \uc0ac\uc6a9\ubc95<\/h3>\n
\uc544\ub798 \uc608\uc2dc\uc640 \uac19\uc774 Rest \ub9e4\uac1c\ubcc0\uc218\ub97c \ud65c\uc6a9\ud558\uba74 \ub2e4\uc218\uc758 \uc778\uc218\ub97c \ud558\ub098\uc758 \ubc30\uc5f4\ub85c \ucc98\ub9ac\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n
function sum(...numbers) {\n    return numbers.reduce((acc, curr) => acc + curr, 0);\n}\n\nconsole.log(sum(1, 2, 3, 4)); \/\/ 10\n<\/code><\/pre>\n
3. \ub9ac\uc561\ud2b8\uc5d0\uc11c\uc758 \uc2a4\ud504\ub808\ub4dc \uc5f0\uc0b0\uc790\uc640 Rest \ub9e4\uac1c\ubcc0\uc218 \uc0ac\uc6a9\ud558\uae30<\/h2>\n
\ub9ac\uc561\ud2b8\uc5d0\uc11c \uc2a4\ud504\ub808\ub4dc \uc5f0\uc0b0\uc790\uc640 Rest \ub9e4\uac1c\ubcc0\uc218\ub294 \uc0c1\ud0dc \uad00\ub9ac\uc640 \ucef4\ud3ec\ub10c\ud2b8\uc758 props \ucc98\ub9ac\uc5d0 \uad49\uc7a5\ud788 \uc720\uc6a9\ud569\ub2c8\ub2e4.<\/p>\n
3.1 \ucef4\ud3ec\ub10c\ud2b8 Props\uc5d0 \uc2a4\ud504\ub808\ub4dc \uc5f0\uc0b0\uc790 \uc0ac\uc6a9\ud558\uae30<\/h3>\n
\uc2a4\ud504\ub808\ub4dc \uc5f0\uc0b0\uc790\ub97c \uc0ac\uc6a9\ud558\uba74 \uac1d\uccb4\uc758 \ubaa8\ub4e0 prop\ub97c \ud55c \ubc88\uc5d0 \uc804\ub2ec\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc774\ub85c \uc778\ud574 \ucf54\ub4dc\uc758 \uc911\ubcf5\uc744 \uc904\uc774\uace0, \ud6a8\uc728\uc801\uc73c\ub85c props\ub97c \uc804\ud30c\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n
const Button = ({ label, ...props }) => {\n    return <button {...props}>{label}<\/button>;\n};\n\nconst App = () => {\n    return <Button label=\"Click Me\" onClick={() => alert('Clicked!')} \/>;\n};\n<\/code><\/pre>\n
3.2 \uc0c1\ud0dc \uad00\ub9ac\uc640 Rest \ub9e4\uac1c\ubcc0\uc218 \uc0ac\uc6a9\ud558\uae30<\/h3>\n
\ub9ac\uc561\ud2b8\uc758 \uc0c1\ud0dc \uad00\ub9ac\uc5d0\uc11c Rest \ub9e4\uac1c\ubcc0\uc218\ub97c \ud65c\uc6a9\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc544\ub798 \uc608\uc2dc\ub294 state \uc5c5\ub370\uc774\ud2b8\uc5d0\uc11c Rest \ub9e4\uac1c\ubcc0\uc218\ub97c \uc801\uc6a9\ud558\ub294 \ubc29\ubc95\uc744 \ubcf4\uc5ec\uc90d\ub2c8\ub2e4.<\/p>\n
const [state, setState] = useState({ a: 1, b: 2 });\n\nconst updateState = (newValues) => {\n    setState((prevState) => ({\n        ...prevState,\n        ...newValues,\n    }));\n};\n\n\/\/ \uc0ac\uc6a9 \uc608\nupdateState({ b: 3 });\n<\/code><\/pre>\n
4. \uacb0\ub860<\/h2>\n
\uc2a4\ud504\ub808\ub4dc \uc5f0\uc0b0\uc790\uc640 Rest \ub9e4\uac1c\ubcc0\uc218\ub294 \ub9ac\uc561\ud2b8\uc640 JavaScript \uc804\ubc18\uc5d0\uc11c \ub9e4\uc6b0 \uc720\uc6a9\ud55c \ub3c4\uad6c\uc785\ub2c8\ub2e4. \uc774\ub97c \ud1b5\ud574 \ucf54\ub4dc\ub97c \uac04\uacb0\ud558\uac8c \uc720\uc9c0\ud558\uace0, \uac00\ub3c5\uc131\uc744 \ub192\uc774\uba70, \ud6a8\uc728\uc801\uc778 \ub370\uc774\ud130 \ucc98\ub9ac\ub97c \uac00\ub2a5\ud558\uac8c \ud569\ub2c8\ub2e4. \ub9ac\uc561\ud2b8 \uac1c\ubc1c\uc5d0\uc11c \uc774\ub7ec\ud55c \ub3c4\uad6c\ub4e4\uc744 \uc801\uadf9 \ud65c\uc6a9\ud568\uc73c\ub85c\uc368 \ub354\uc6b1 \uae54\ub054\ud558\uace0 \uad00\ub9ac\ud558\uae30 \uc26c\uc6b4 \ucf54\ub4dc\ub97c \uc791\uc131\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n
5. \ucd94\uac00 \uc790\ub8cc<\/h2>\n
\ub354 \uc790\uc138\ud55c \ub0b4\uc6a9\uc744 \uc6d0\ud558\uc2e0\ub2e4\uba74, \uc544\ub798\uc758 \uc790\ub8cc\ub97c \ucc38\uc870\ud558\uc2dc\uae30 \ubc14\ub78d\ub2c8\ub2e4:<\/p>\n