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Update array.md

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undefined拼错
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kei0502 2016-08-10 16:47:36 +08:00 committed by GitHub
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@ -74,7 +74,7 @@ function foo() {
```javascript
Array.from({ length: 3 });
// [ undefined, undefined, undefinded ]
// [ undefined, undefined, undefined ]
```
上面代码中，`Array.from`返回了一个具有三个成员的数组，每个位置的值都是`undefined`。扩展运算符转换不了这个对象。