chore(learn): Applied MDX format to Chinese curriculum files (#40462)
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---
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id: 5966c21cf732a95f1b67dd28
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title: 日期操纵
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challengeType: 5
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videoUrl: ''
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title: 日期操纵
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---
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## Description
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<section id="description">任务: <p>给定EST中的日期字符串,将给定日期输出为字符串,并添加12小时。 </p><p>时区应该保留。 </p><p>示例输入: </p><p> <code>"March 7 2009 7:30pm EST"</code> </p> <p>输出示例: </p><p> <code>"March 8 2009 7:30am EST"</code> </p> </section>
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# --description--
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## Instructions
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<section id="instructions">
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</section>
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任务:
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## Tests
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<section id='tests'>
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给定EST中的日期字符串,将给定日期输出为字符串,并添加12小时。
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```yml
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tests:
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- text: <code>add12Hours</code>是一个功能。
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testString: assert(typeof add12Hours === 'function');
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- text: <code>add12Hours(dateString)</code>应该返回一个字符串。
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testString: assert(typeof add12Hours('January 17 2017 11:43am EST') === 'string');
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- text: <code>add12Hours("" + tests[0] + "")</code>应该返回<code>"" + answers[0] + ""</code>
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testString: assert(add12Hours('January 17 2017 11:43am EST') === 'January 17 2017 11:43pm EST');
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- text: 汉德尔应该改变一天。 <code>add12Hours("" + tests[1] + "")</code>应返回<code>"" + answers[1] + ""</code>
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testString: assert(add12Hours('March 7 2009 7:30pm EST') === 'March 8 2009 7:30am EST');
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- text: 汉德尔月份应该在闰年中发生变化。 <code>add12Hours("" + tests[2] + "")</code>应返回<code>"" + answers[2] + ""</code>
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testString: assert(add12Hours('February 29 2004 9:15pm EST') === 'March 1 2004 9:15am EST');
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- text: 应该在一个共同的年份改变汉德尔月份。 <code>add12Hours("" + tests[3] + "")</code>应该返回<code>"" + answers[3] + ""</code>
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testString: assert(add12Hours('February 28 1999 3:15pm EST') === 'March 1 1999 3:15am EST');
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- text: 汉德尔应该改变一年。 <code>add12Hours("" + tests[4] + "")</code>应该返回<code>"" + answers[4] + ""</code>
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testString: assert(add12Hours('December 31 2020 1:45pm EST') === 'January 1 2021 1:45am EST');
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时区应该保留。
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```
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示例输入:
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</section>
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`"March 7 2009 7:30pm EST"`
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## Challenge Seed
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<section id='challengeSeed'>
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输出示例:
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<div id='js-seed'>
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`"March 8 2009 7:30am EST"`
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# --hints--
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`add12Hours`是一个功能。
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```js
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function add12Hours (dateString) {
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// Good luck!
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return true;
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}
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assert(typeof add12Hours === 'function');
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```
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</div>
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### After Test
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<div id='js-teardown'>
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`add12Hours(dateString)`应该返回一个字符串。
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```js
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console.info('after the test');
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assert(typeof add12Hours('January 17 2017 11:43am EST') === 'string');
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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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`add12Hours("" + tests[0] + "")`应该返回`"" + answers[0] + ""`
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```js
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// solution required
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assert(
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add12Hours('January 17 2017 11:43am EST') === 'January 17 2017 11:43pm EST'
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);
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```
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/section>
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汉德尔应该改变一天。 `add12Hours("" + tests[1] + "")`应返回`"" + answers[1] + ""`
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```js
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assert(add12Hours('March 7 2009 7:30pm EST') === 'March 8 2009 7:30am EST');
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```
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汉德尔月份应该在闰年中发生变化。 `add12Hours("" + tests[2] + "")`应返回`"" + answers[2] + ""`
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```js
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assert(add12Hours('February 29 2004 9:15pm EST') === 'March 1 2004 9:15am EST');
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```
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应该在一个共同的年份改变汉德尔月份。 `add12Hours("" + tests[3] + "")`应该返回`"" + answers[3] + ""`
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```js
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assert(add12Hours('February 28 1999 3:15pm EST') === 'March 1 1999 3:15am EST');
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```
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汉德尔应该改变一年。 `add12Hours("" + tests[4] + "")`应该返回`"" + answers[4] + ""`
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```js
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assert(
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add12Hours('December 31 2020 1:45pm EST') === 'January 1 2021 1:45am EST'
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);
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```
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# --solutions--
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