javascript - 如果对象属性存在于 Javascript/Typescript 中的另一个对象上，如何删除对象属性

Question

我有这个对象:

{
  "id": "33343232",
  "createdAt": "2022-07-26T13:44:01.080Z",
  "updatedAt": "2022-07-26T13:45:31.000Z",
  "name": "Name Here",
  "description": "text",
}

另一个对象是:

specificFeatures": {
    "id": "33343232",
    "createdAt": "2022-07-26T13:44:01.087Z",
    "updatedAt": "2022-07-26T13:45:31.000Z",
    "name": "Name Here",
    "description": "text",
    "coverage": "international",
    "income": 0,
    "observationIncome": "",
}

现在，我希望 specialFeatures 对象的属性键与要删除的第一个对象相同。

在此示例中，它将是:

specificFeatures": {
    "coverage": "international",
    "income": 0,
    "observationIncome": "",
}

你能告诉我该怎么做吗？

Answer 1

要实现这一点，您可以简单地迭代对象属性，检查“原始”对象是否具有该属性，如果有，则从“specificFeatures”对象中将其删除:

const original = {
  "id": "33343232",
  "createdAt": "2022-07-26T13:44:01.080Z",
  "updatedAt": "2022-07-26T13:45:31.000Z",
  "name": "Name Here",
  "description": "text",
}

const specificFeatures = {
  "id": "33343232",
  "createdAt": "2022-07-26T13:44:01.087Z",
  "updatedAt": "2022-07-26T13:45:31.000Z",
  "name": "Name Here",
  "description": "text",
  "coverage": "international",
  "income": 0,
  "observationIncome": "",
}

// Iterate over object keys
Object.keys(specificFeatures).forEach(prop => {
  // Check if the "original" object has the property defined
  if (original.hasOwnProperty(prop)) {
    // Delete the property from the "specificFeatures" object
    delete specificFeatures[prop];
  }
});

console.log(specificFeatures);

请注意，这种方式会改变原始对象，如果您需要保持原始对象不变，则应创建一个新的唯一副本。可能的解决方案之一可以是 Object.entries() 的组合和 Array.reduce()方法:

const original = {
  "id": "33343232",
  "createdAt": "2022-07-26T13:44:01.080Z",
  "updatedAt": "2022-07-26T13:45:31.000Z",
  "name": "Name Here",
  "description": "text",
}

const specificFeatures = {
  "id": "33343232",
  "createdAt": "2022-07-26T13:44:01.087Z",
  "updatedAt": "2022-07-26T13:45:31.000Z",
  "name": "Name Here",
  "description": "text",
  "coverage": "international",
  "income": 0,
  "observationIncome": "",
}

const result = Object.entries(specificFeatures).reduce((acc, [key, val]) => {
  if (!original.hasOwnProperty(key))
    acc[key] = val;
  return acc;
}, {});

console.log(result);
console.log('Is a different object:', result !== specificFeatures);