2024 IT鐵人賽 Day25 -深拷貝

javascript javascript 30

will93068 2024-10-22 21:16:08 ‧ 390 瀏覽

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第三方套件 lodash

      // 使用 lodash 的 cloneDeep 方法進行深拷貝
      const obj2 = _.cloneDeep(obj1);
      obj2.name = "jacky";
      obj2.info.age = 100;
      console.log("使用 lodash 的 cloneDeep 方法:");
      console.log("原始物件:", obj1);
      console.log("深拷貝後的物件:", obj2);

JSON.parse()

      // 使用 JSON.parse(JSON.stringify(obj)) 方法進行深拷貝
      const deepCopy = (obj) => {
        return JSON.parse(JSON.stringify(obj));
      };

      const obj3 = deepCopy(obj1);
      obj1.info.interest.code = "C#";
      console.log("使用 JSON.parse(JSON.stringify(obj)) 方法:");
      console.log("原始物件:", obj1);
      console.log("深拷貝後的物件:", obj3);

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Day25 lodash深拷貝</title>
  </head>
  <body>
    <script src="https://cdn.jsdelivr.net/npm/lodash@4.17.21/lodash.min.js"></script>
    <script>
      const obj1 = {
        name: "12345",
        info: {
          age: 12,
          address: "taiwan",
          sex: "boy",
          interest: {
            code: "javascript",
            sports: "basketball",
            watch: "movie",
          },
        },
      };

      // 使用 lodash 的 cloneDeep 方法進行深拷貝
      const obj2 = _.cloneDeep(obj1);
      obj2.name = "jacky";
      obj2.info.age = 100;
      console.log("使用 lodash 的 cloneDeep 方法:");
      console.log("原始物件:", obj1);
      console.log("深拷貝後的物件:", obj2);

      // 使用 JSON.parse(JSON.stringify(obj)) 方法進行深拷貝
      const deepCopy = (obj) => {
        return JSON.parse(JSON.stringify(obj));
      };

      const obj3 = deepCopy(obj1);
      obj1.info.interest.code = "C#";
      console.log("使用 JSON.parse(JSON.stringify(obj)) 方法:");
      console.log("原始物件:", obj1);
      console.log("深拷貝後的物件:", obj3);
    </script>
  </body>
</html>