如何在javascript中更改鍵名數組對象？

Question

我有一個像這樣的任務對象數組：

1-1 [
  {
    t_class_id: 1,
    t_class_subject_id: 1,
    t_class_task_id: 1,
    title: 'Mengerjakan Soal',
    sec_user_id: '4',
    is_submit: 0,
    is_intime: 0,
    total: 1
  },
  {
    t_class_id: 1,
    t_class_subject_id: 1,
    t_class_task_id: 1,
    title: 'Mengerjakan Soal',
    sec_user_id: '8',
    is_submit: 1,
    is_intime: 0,
    total: 1
  },
  {
    t_class_id: 1,
    t_class_subject_id: 1,
    t_class_task_id: 1,
    title: 'Mengerjakan Soal',
    sec_user_id: '3,5,7',
    is_submit: 1,
    is_intime: 1,
    total: 3
  }
]
2-2 [...]
3-4 [...]

如何使用Javascript / ES6 將每個鍵名總計更改為不同的鍵名：

預期結果僅更改總鍵名：

我總是在每個數組中有 3 個對象，我想根據索引將每個對象的總鍵更改為noSubmit 、 late和onTime

1-1 [
  {
    t_class_id: 1,
    t_class_subject_id: 1,
    t_class_task_id: 1,
    title: 'Mengerjakan Soal',
    sec_user_id: '4',
    is_submit: 0,
    is_intime: 0,
    noSubmit: 1
  },
  {
    t_class_id: 1,
    t_class_subject_id: 1,
    t_class_task_id: 1,
    title: 'Mengerjakan Soal',
    sec_user_id: '8',
    is_submit: 1,
    is_intime: 0,
    late: 1
  },
  {
    t_class_id: 1,
    t_class_subject_id: 1,
    t_class_task_id: 1,
    title: 'Mengerjakan Soal',
    sec_user_id: '3,5,7',
    is_submit: 1,
    is_intime: 1,
    onTime: 3
  }
]
2-2 [...]
3-4 [...]

我該如何解決問題？

Answer 1

您不能更改 JavaScript 對象屬性的名稱，只能創建一個新屬性並刪除舊屬性。 您可以在現有對象上執行此操作，也可以通過創建新對象來執行此操作。

我不太清楚你所說的改變的規則，但這里有一個簡單的例子：

entry.newName = entry.originalName;
delete entry.originalName;

現場示例：

 const container = { "1-1": [ { originalName: 1, unrelatedProperty: "example1", }, { originalName: 2, unrelatedProperty: "example2", }, { originalName: 3, unrelatedProperty: "example3", }, ], "2-2": [ { originalName: 4, unrelatedProperty: "example4", }, { originalName: 5, unrelatedProperty: "example5", }, { originalName: 6, unrelatedProperty: "example6", }, ] }; for (const array of Object.values(container)) { for (const entry of array) { entry.newName = entry.originalName; delete entry.originalName; } } console.log(container);

或者通過創建新對象：

const {originalName, ...rest} = entry;
const newEntry = {newName: originalName, ...rest};

現場示例：

 const container = { "1-1": [ { originalName: 1, unrelatedProperty: "example1", }, { originalName: 2, unrelatedProperty: "example2", }, { originalName: 3, unrelatedProperty: "example3", }, ], "2-2": [ { originalName: 4, unrelatedProperty: "example4", }, { originalName: 5, unrelatedProperty: "example5", }, { originalName: 6, unrelatedProperty: "example6", }, ] }; for (const [key, array] of Object.entries(container)) { container[key] = array.map(({originalName, ...rest}) => ({newName: originalName, ...rest})); } console.log(container);