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这句话有点没看懂,请教是什么意思。 #6

@332lfgb6

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@332lfgb6
  1. 文中说:未定义的属性将不会被复制,可是为什么新得到的对象有age属性?
const person = { name: 'Mike', age: undefined };
log(Utils.extend(person, { name: 'Jack', gender: 'female' }));
// => {name: "Jack", age: undefined, gender: "female"}
  1. 还有一个问题是下面这句话:然而从对象的原型继承的属性将会被复制。大佬可以举几个例子到文档中吗?这2句话实在没看懂。麻烦大佬了。
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