59 lines
2.7 KiB
Markdown
59 lines
2.7 KiB
Markdown
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---
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id: af4afb223120f7348cdfc9fd
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title: Map the Debris
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challengeType: 5
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videoUrl: ''
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localeTitle: 映射碎片
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---
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## Description
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<section id="description">返回一个新数组，将元素的平均高度转换为轨道周期（以秒为单位）。该数组将包含<code>{name: 'name', avgAlt: avgAlt}</code>格式的对象。您可以<a href="http://en.wikipedia.org/wiki/Orbital_period" target="_blank">在维基百科上</a>阅读有关轨道周期的<a href="http://en.wikipedia.org/wiki/Orbital_period" target="_blank">信息</a> 。值应四舍五入到最接近的整数。轨道上的身体是地球。地球半径为6367.4447公里，地球的GM值为398600.4418 km <sup>3</sup> s <sup>-2</sup> 。如果卡住，请记得使用<a href="http://forum.freecodecamp.org/t/how-to-get-help-when-you-are-stuck/19514" target="_blank">Read-Search-Ask</a> 。尝试配对程序。编写自己的代码。 </section>
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## Instructions
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<section id="instructions">
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</section>
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## Tests
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<section id='tests'>
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```yml
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tests:
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- text: '<code>orbitalPeriod([{name : "sputnik", avgAlt : 35873.5553}])</code>应返回<code>[{name: "sputnik", orbitalPeriod: 86400}]</code> 。'
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testString: 'assert.deepEqual(orbitalPeriod([{name : "sputnik", avgAlt : 35873.5553}]), [{name: "sputnik", orbitalPeriod: 86400}], "<code>orbitalPeriod([{name : "sputnik", avgAlt : 35873.5553}])</code> should return <code>[{name: "sputnik", orbitalPeriod: 86400}]</code>.");'
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- text: '<code>orbitalPeriod([{name: "iss", avgAlt: 413.6}, {name: "hubble", avgAlt: 556.7}, {name: "moon", avgAlt: 378632.553}])</code>应返回<code>[{name : "iss", orbitalPeriod: 5557}, {name: "hubble", orbitalPeriod: 5734}, {name: "moon", orbitalPeriod: 2377399}]</code> 。'
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testString: 'assert.deepEqual(orbitalPeriod([{name: "iss", avgAlt: 413.6}, {name: "hubble", avgAlt: 556.7}, {name: "moon", avgAlt: 378632.553}]), [{name : "iss", orbitalPeriod: 5557}, {name: "hubble", orbitalPeriod: 5734}, {name: "moon", orbitalPeriod: 2377399}], "<code>orbitalPeriod([{name: "iss", avgAlt: 413.6}, {name: "hubble", avgAlt: 556.7}, {name: "moon", avgAlt: 378632.553}])</code> should return <code>[{name : "iss", orbitalPeriod: 5557}, {name: "hubble", orbitalPeriod: 5734}, {name: "moon", orbitalPeriod: 2377399}]</code>.");'
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```
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</section>
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## Challenge Seed
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<section id='challengeSeed'>
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<div id='js-seed'>
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```js
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function orbitalPeriod(arr) {
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var GM = 398600.4418;
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var earthRadius = 6367.4447;
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return arr;
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}
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orbitalPeriod([{name : "sputnik", avgAlt : 35873.5553}]);
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```
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</div>
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</section>
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## Solution
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<section id='solution'>
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```js
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// solution required
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```
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</section>
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