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14 - JavaScript References VS Copying #21

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52 changes: 52 additions & 0 deletions 14 - JavaScript References VS Copying/changi.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<title>JS Reference VS Copy</title>
</head>
<body>
<script>
// 원시값들의 복사는 일반적이다.
// let age = 100;
// let age2 = age;
// age = 200;

// let name = 'Wes';
// let name2 = name;
// name = 'wesley';

// Let's say we have an array
const players = ["Wes", "Sarah", "Ryan", "Poppy"];

// List 객체의 복사법
const team2 = players.slice();
const team3 = [].concat(players);
const team4 = [...players];
const team5 = Array.from(players);

// 객체의 복사 (얕은복사)
const person = {
name: "Wes Bos",
age: 80,
};

const cap2 = Object.assign({}, person, { number: 99, age: 12 });
const cap3 = { ...person };

console.log(cap2);
console.log(cap3);

// 객체의 깊은 복사
const wes = {
name: "Wes",
age: 100,
social: {
twitter: "@wesbos",
facebook: "wesbos.developer",
},
};

const dev2 = JSON.parse(JSON.stringify(wes));
</script>
</body>
</html>