Zhou Yixing

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same on @types/ali-oss": "^6.16.3",

``` 以上这部分代码核心就是得出每一帧所耗时间及下一帧的时间,xxx ``` 请问,能详细分析下是如何计算每一帧所耗时间么

divideBy2 如果传入 0 就会有问题显示一个 '' ",更应该期待为 0 console.log(divideBy2(0) === '0'); console.log(divideBy2(1) === '1'); console.log(divideBy2(2) === '10'); console.log(divideBy2(4) === '100');

``` import React from 'react' import ReactDOM from 'react-dom' function App() { return ( { [1,1,2,2].map((val)=>{val}) } ) } ReactDOM.render(,document.getElementById('root')) ``` 2019.07.18 [email protected] 测试会显示1,1,2,2 ![image](https://user-images.githubusercontent.com/13035580/61461118-a7694180-a9a2-11e9-8ba4-8b7b1fd8fa24.png)