blocks|key|1370028|text|hasOwnProperty不会检查原型链，因此如果返回true，您就知道该属性是而不是继承的。您不需要检查父对象成员。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|BOLD|entityRanges|data|1370029|if+(object.hasOwnProperty(member))
++++methods.push(member)
else
++++...|code-block|syntax|javascript|1370030|有关更多细节，请访问Object.prototype.hasOwnProperty()|1370031|entityMap|0|LINK|mutability|MUTABLE|url|https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/hasOwnProperty^0|0|E|15|3|0|0|A|X|0|0^^$0|@$1|2|3|4|5|6|7|V|8|@$9|W|A|X|B|C]|$9|Y|A|Z|B|D]]|E|@]|F|$]]|$1|G|3|H|5|I|7|10|8|@]|E|@]|F|$J|K]]|$1|L|3|M|5|6|7|11|8|@]|E|@$9|12|A|13|1|14]]|F|$]]|$1|N|3|-4|5|6|7|15|8|@]|E|@]|F|$]]]|O|$P|$5|Q|R|S|F|$T|U]]]]

<code>hasOwnProperty</code> does not check through the prototype chain, so if it returns true you know that the property was not inherited. You don't need to check the parent object members.

<pre><code>if (object.hasOwnProperty(member))
 methods.push(member)
else
 ...
</code></pre>

For more details - <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/hasOwnProperty" rel="nofollow">Object.prototype.hasOwnProperty()</a>

blocks|key|2348398|text|我希望您已经了解了how+classes+work+in+JavaScript以及如何为它们完成继承。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|2348399|(var+A+in+THREE)+{+if+(+|2348400|+if+===+"function“&&+object+instanceof+THREEa+&&+a+!==+className)+{=+a；|blockquote|2348401|2348402|2348403|这不适用于多级继承。最好使用像这样的东西|2348404|function+getParent+(className)+{
++++var+proto+=+THREE[className].prototype,
++++++++parproto+=+Object.getPrototypeOf(proto);

++++for+(var+a+in+THREE)
++++++++if+(typeof+THREE[a]+===+"function"+&&+THREE[a].prototype+===+parproto)
++++++++++++return+a;
++++return+null;
}|code-block|syntax|javascript|2348405|但请注意，这只检测原型继承，而不是像混合继承这样的东西。因为原型继承是在Three.js中使用the+standard+pattern完成的，所以您也可以使用just+search+the+code|2348406|2348407|我可以确定成员的类型，但是我如何检查它不是继承的？如果父对象存在，并且我存储了它的引用，则否定parentObject.hasOwnProperty的结果是不起作用的。|2348408|2348409|2348410|我不知道在你的例子中parentObject是什么，但特别是对于方法来说，它可能是一个实例从它的原型继承了这个方法，也就是说，没有把它作为自己的属性。|style|CODE|2348411|你最好这样做：|2348412|function+describeProperties(className)+{
++++try+{
++++++++var+o+=+new+THREE[className](),+//+do+you+know+appropriate+arguments?
++++++++++++p+=+Object.getPrototypeOf(o);
++++}+catch(e)+{+//+probably+constructor+call+was+not+successful
++++++++o+=+p+=+THREE[className].prototype;
++++}
++++var+props+=+{};
++++for+(var+prop+in+o)+{
++++++++var+desc+=+[];
++++++++desc.push(+(typeof+o[prop]+==+"function")+?+"method"+:+"value");
++++++++if+(!(prop+in+p))+//+does+not+appear+on+the+prototype
++++++++++++desc.push("instance-specific")+//+so+was+added+in+constructor
++++++++if+(o+!==+p+&&+o.hasOwnProperty(prop)+&&+prop+in+p)
++++++++++++desc.push("defaulted");
++++++++if+(prop+in+Object.getPrototypeOf(p))+{
++++++++++++desc.push("inherited")+//+from+parent+class
++++++++++++if+(p.hasOwnProperty(prop))+//+but+also+in+own+prototype
++++++++++++++++desc.push("overwritten");
++++++++}
++++++++props[prop]+=+desc.join("+");
++++}
++++return+props;
}|2348413|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/a/13418980/1048572|1|https://stackoverflow.com/q/10898786/1048572|2|https://github.com/mrdoob/three.js/search?q=%2522Object.create%2522&type=Code^0|9|U|0|0|0|0|0|0|0|0|1B|K|1|27|K|2|0|0|0|0|0|A|C|0|0|0^^$0|@$1|2|3|4|5|6|7|1I|8|@]|9|@$A|1J|B|1K|1|1L]]|C|$]]|$1|D|3|E|5|6|7|1M|8|@]|9|@]|C|$]]|$1|F|3|G|5|H|7|1N|8|@]|9|@]|C|$]]|$1|I|3|-4|5|6|7|1O|8|@]|9|@]|C|$]]|$1|J|3|-4|5|6|7|1P|8|@]|9|@]|C|$]]|$1|K|3|L|5|6|7|1Q|8|@]|9|@]|C|$]]|$1|M|3|N|5|O|7|1R|8|@]|9|@]|C|$P|Q]]|$1|R|3|S|5|6|7|1S|8|@]|9|@$A|1T|B|1U|1|1V]|$A|1W|B|1X|1|1Y]]|C|$]]|$1|T|3|-4|5|6|7|1Z|8|@]|9|@]|C|$]]|$1|U|3|V|5|H|7|20|8|@]|9|@]|C|$]]|$1|W|3|-4|5|6|7|21|8|@]|9|@]|C|$]]|$1|X|3|-4|5|6|7|22|8|@]|9|@]|C|$]]|$1|Y|3|Z|5|6|7|23|8|@$A|24|B|25|10|11]]|9|@]|C|$]]|$1|12|3|13|5|6|7|26|8|@]|9|@]|C|$]]|$1|14|3|15|5|O|7|27|8|@]|9|@]|C|$P|Q]]|$1|16|3|-4|5|6|7|28|8|@]|9|@]|C|$]]]|17|$18|$5|19|1A|1B|C|$1C|1D]]|1E|$5|19|1A|1B|C|$1C|1F]]|1G|$5|19|1A|1B|C|$1C|1H]]]]

I hope you have understood <a href="https://stackoverflow.com/a/13418980/1048572">how classes work in JavaScript</a> and how inheritance is done for them.

<blockquote>
<pre><code>for (var a in THREE) {
 if (typeof THREE[a] === "function" &amp;&amp; object instanceof THREE[a] &amp;&amp; a !== className) {
 parent = a;
</code></pre>
</blockquote>

That does not work for multi-level inheritance. Better use something like

<pre><code>function getParent (className) {
 var proto = THREE[className].prototype,
 parproto = Object.getPrototypeOf(proto);

 for (var a in THREE)
 if (typeof THREE[a] === "function" &amp;&amp; THREE[a].prototype === parproto)
 return a;
 return null;
}
</code></pre>

But notice that this only detects prototypical inheritance, no such things like mixin inheritance. Since prototypical inheritance is done using <a href="https://stackoverflow.com/q/10898786/1048572">the standard pattern</a> in Three.js, you might as well <a href="https://github.com/mrdoob/three.js/search?q=%22Object.create%22&amp;type=Code" rel="nofollow noreferrer">just search the code</a>

<blockquote>
 I can determine what kind of the member is, but how can i check that, it is not inherited? If parent is exist and I store a reference of it, negating the result of parentObject.hasOwnProperty does not work.
</blockquote>

I don't know what <code>parentObject</code> is in your case, but especially for methods it might be likely that an instance does inherit the method from its prototype, i.e. does not have it as an own property.

You better do something like this:

<pre><code>function describeProperties(className) {
 try {
 var o = new THREE[className](), // do you know appropriate arguments?
 p = Object.getPrototypeOf(o);
 } catch(e) { // probably constructor call was not successful
 o = p = THREE[className].prototype;
 }
 var props = {};
 for (var prop in o) {
 var desc = [];
 desc.push( (typeof o[prop] == "function") ? "method" : "value");
 if (!(prop in p)) // does not appear on the prototype
 desc.push("instance-specific") // so was added in constructor
 if (o !== p &amp;&amp; o.hasOwnProperty(prop) &amp;&amp; prop in p)
 desc.push("defaulted");
 if (prop in Object.getPrototypeOf(p)) {
 desc.push("inherited") // from parent class
 if (p.hasOwnProperty(prop)) // but also in own prototype
 desc.push("overwritten");
 }
 props[prop] = desc.join(" ");
 }
 return props;
}
</code></pre>

I would like to analyse the classes of three.js library. I have a function, that can find out, if the given class relaying on another class or not.

<pre><code>function getParent (className) {
 var parent = null;
 var object = new THREE[className]();

 for (var a in THREE) {
 if (typeof THREE[a] === "function" &amp;&amp; object instanceof THREE[a] &amp;&amp; a !== className) {
 parent = a;

 break
 }
 }
 return(parent)
}
</code></pre>

And I also would like to have a function that returns 2 arrays. One with properties and one with methods. When iterating over "object", I can determine what kind of the member is, but how can i check that, it is not inherited?
If parent is exist and I store a reference of it, negating the result of parentObject.hasOwnProperty does not work.

<pre><code>for (var member in object) {
 if (typeof object[member] === "function") {
 if (!parentObject.hasOwnProperty(member)) {
 methods.push(member)
 }
 }
 else {
 //...
 }
}
</code></pre>

Analysing three.js

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我想分析一下three.js库的类。我有一个函数，可以找出给定的类是否依赖于另一个类。function getParent (className) {    var parent = null;    var object = new THREE[className]();    for (var a in THREE...

问分析three.js
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问分析three.jsEN