25 lines
686 B
Markdown
25 lines
686 B
Markdown
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---
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title: Understand Own Properties
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localeTitle: 了解自己的属性
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---
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## 了解自己的属性
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### 方法：
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在给出的示例代码中，您将看到一个新数组`ownProps[]` intialised，然后是`for...in`语句循环遍历`duck`的属性，然后使用`push()`语句填充新数组。对于`canary`对象必须遵循相同的方法。
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只需将'for ... in'语句中的`duck`对象替换为`canary`对象即可传递所有测试用例。
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### 解：
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```javascript
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let canary = new Bird("Tweety");
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let ownProps = [];
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// Add your code below this line
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for(let property in canary) {
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if(canary.hasOwnProperty(property)) {
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ownProps.push(property);
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}
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}
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```
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