如何使用默认原型从没有原型的对象创建JS对象？ [英] How to create a JS object with the default prototype from an object without a prototype?
问题描述
背景：查询字符串模块适用于示例能够将 key = value& hello = universe 解析为对象 {key：'value'，hello：'universe'} 。但是，模块作者已决定返回的对象没有原型。换句话说，这个混蛋对象是由 Object.create（null）创建的。
Background: The module query-string is for example able to parse key=value&hello=universe to an object {key: 'value', hello: 'universe'}. However, the module author has decided that the returned object does not have a prototype. In other words, this "bastard" object is created by Object.create(null).
问题：使用 parsed.hasOwnProperty（'hello'）会很方便，但如果没有默认对象原型，这是不可能的。当然，可以 Object.prototype.hasOwnProperty.call（已解析，'hello'）但我认为我们都同意这样的表达式是kill-immediately-after- after-出生难看。
Problem: It would be convenient to use parsed.hasOwnProperty('hello') but that is not possible without the default object prototype. Of course, one could Object.prototype.hasOwnProperty.call(parsed, 'hello') but I think we can all agree that such an expression is kill-immediately-after-birth ugly.
问题：如何很好地将无原型对象转换为默认对象原型和方法，例如 hasOwnProperty ？另外，这可以在不使用担心 __ proto __ 或 setPrototypeOf ？
Question: How to nicely convert the prototypeless object to have a default object prototype and methods such as hasOwnProperty? Additionally, can this be done without using the feared __proto__ or setPrototypeOf?
推荐答案
使用
parsed.hasOwnProperty（'hello'）会很方便，但这不是可能没有默认对象原型
It would be convenient to use
parsed.hasOwnProperty('hello')but that is not possible without the default object prototype
创建这样一个混蛋对象的全部意义在于你不能这样做 - 如果有人怎么办？发送查询字符串？hasOwnProperty = oops 到您的服务器？
The whole point of creating such a "bastard object" is that you cannot do that - what if someone sent a query string ?hasOwnProperty=oops to your server?
如何正确将无原型对象转换为默认对象原型和方法，如
hasOwnProperty？
不要。您应该使用长格式与调用，或者只是去 在运算符中你需要什么：
Don't. You should either use the long form with call, or just go for the in operator which does exactly what you need:
'hello' in parsed
在ES6环境中，您可能还希望将对象转换为正确的 Map 并使用它 has 方法。
In an ES6 environment, you might also want to convert the object to a proper Map and use it has method.
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