--- id: 587d7daf367417b2b2512b7d title: Iterate Over All Properties challengeType: 1 videoUrl: '' localeTitle: 迭代所有属性 --- ## Description <section id="description">您现在已经看到了两种属性: <code>own</code>属性和<code>prototype</code>属性。 <code>Own</code>属性直接在对象实例本身上定义。和<code>prototype</code>属性所定义的<code>prototype</code> 。 <blockquote> function Bird(name){ <br> this.name = name; //拥有财产<br> } <br><br> Bird.prototype.numLegs = 2; //原型属性<br><br>让鸭子=新鸟(“唐纳德”); </blockquote>以下是如何将<code>duck</code> <code>own</code>属性添加到数组<code>ownProps</code>和<code>prototype</code>属性到数组<code>prototypeProps</code> : <blockquote>让ownProps = []; <br>让prototypeProps = []; <br><br> for(let duck in duck){ <br> if(duck.hasOwnProperty(property)){ <br> ownProps.push(属性); <br> } else { <br> prototypeProps.push(属性); <br> } <br> } <br><br>的console.log(ownProps); //打印[“名称”] <br>的console.log(prototypeProps); //打印[“numLegs”] </blockquote></section> ## Instructions <section id="instructions">所有添加<code>own</code>的属性<code>beagle</code>到数组<code>ownProps</code> 。将<code>Dog</code>所有<code>prototype</code>属性添加到数组<code>prototypeProps</code> 。 </section> ## Tests <section id='tests'> ```yml tests: - text: <code>ownProps</code>数组应包含<code>"name"</code> 。 testString: 'assert(ownProps.indexOf("name") !== -1, "The <code>ownProps</code> array should include <code>"name"</code>.");' - text: <code>prototypeProps</code>数组应该包含<code>"numLegs"</code> 。 testString: 'assert(prototypeProps.indexOf("numLegs") !== -1, "The <code>prototypeProps</code> array should include <code>"numLegs"</code>.");' - text: 无需使用内置方法<code>Object.keys()</code>即可解决此挑战。 testString: 'assert(!/\Object.keys/.test(code), "Solve this challenge without using the built in method <code>Object.keys()</code>.");' ``` </section> ## Challenge Seed <section id='challengeSeed'> <div id='js-seed'> ```js function Dog(name) { this.name = name; } Dog.prototype.numLegs = 4; let beagle = new Dog("Snoopy"); let ownProps = []; let prototypeProps = []; // Add your code below this line ``` </div> </section> ## Solution <section id='solution'> ```js // solution required ``` </section>