从JavaScript中的对象提取属性
我们必须编写一个JavaScript函数，比如说extract()将一个对象的属性提取到另一个对象，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"])通过提取函数后，它们应该变成-
obj1 = { age:23 }
obj2 = {color:"red", name:"cindy"}因此，让我们为该函数编写代码-
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);输出结果
控制台中的输出将为-
{ name: 'Rahul', job: 'Software Engineer', hobby: 'Reading books' }
{ age: 23, city: 'Mumbai' }