在 JavaScript 中从对象中提取属性
javascriptweb developmentobject oriented programming更新于 2025/10/13 2:20:17
我们必须编写一个 JavaScript 函数，比如 extract()，它将属性从一个对象提取到另一个对象，然后从原始对象中删除它们。
例如 −
如果 obj1 和 obj2 是两个对象，则
obj1 = {color:"red", age:"23", name:"cindy"}
obj2 = extract(obj1, ["color","name"])
经过 extract 函数后，它们应该变成 −
obj1 = { age:23 }
obj2 = {color:"red", name:"cindy"}
因此，让我们编写该函数的代码 −
示例
const obj = {
name: "Rahul",
job: "Software Engineer",
age: 23,
city: "Mumbai",
hobby: "Reading books"
};
const extract = (obj, ...keys) => {
const newObject = Object.assign({});
Object.keys(obj).forEach((key) => {
if(keys.includes(key)){
newObject[key] = obj[key];
delete obj[key];
};
});
return newObject;
};
console.log(extract(obj, 'name', 'job', 'hobby'));
console.log(obj);
输出
控制台中的输出将是 −
{ name: 'Rahul', job: 'Software Engineer', hobby: 'Reading books' }
{ age: 23, city: 'Mumbai' }
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有用资源
javascript 参考教程 - 该教程包含有关 javascript 的更多信息:https://www.cainiaomax.com/javascript/
