76 lines
2.2 KiB
Markdown
76 lines
2.2 KiB
Markdown
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---
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title: Combinations
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id: 5958469238c0d8d2632f46db
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challengeType: 5
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videoUrl: ''
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localeTitle: 组合
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---
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## Description
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<section id="description">任务： <p>给定非负整数<big>m</big>和<big>n</big> ，以排序顺序生成从<big>0</big> （零）到<big>n-1</big>的整数的所有大小<big>m个</big> <a href="http://mathworld.wolfram.com/Combination.html" title="链接：http：//mathworld.wolfram.com/Combination.html">组合</a> （每个组合被排序并且整个表被排序）。 </p>例： <p> <big>3</big>梳子<big>5</big>是： </p><pre> 0 1 2
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0 1 3
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0 1 4
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0 2 3
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0 2 4
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0 3 4
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1 2 3
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1 2 4
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1 3 4
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2 3 4
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</pre></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>combinations</code>是一种功能。
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testString: 'assert(typeof combinations === "function", "<code>combinations</code> is a function.");'
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- text: '<code>combinations(3, 5)</code>应返回<code>[[0, 1, 2], [0, 1, 3], [0, 1, 4], [0, 2, 3], [0, 2, 4], [0, 3, 4], [1, 2, 3], [1, 2, 4], [1, 3, 4], [2, 3, 4]]</code> 。'
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testString: 'assert.deepEqual(combinations(testInput1[0], testInput1[1]), testOutput1, "<code>combinations(3, 5)</code> should return <code>[[0, 1, 2], [0, 1, 3], [0, 1, 4], [0, 2, 3], [0, 2, 4], [0, 3, 4], [1, 2, 3], [1, 2, 4], [1, 3, 4], [2, 3, 4]]</code>.");'
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- text: '<code>combinations(4, 6)</code>应返回<code>[[0,1,2,3], [0,1,2,4], [0,1,2,5], [0,1,3,4], [0,1,3,5], [0,1,4,5], [0,2,3,4], [0,2,3,5], [0,2,4,5], [0,3,4,5], [1,2,3,4], [1,2,3,5], [1,2,4,5], [1,3,4,5], [2,3,4,5]]</code>'
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testString: 'assert.deepEqual(combinations(testInput2[0], testInput2[1]), testOutput2, "<code>combinations(4, 6)</code> should return <code>[[0,1,2,3], [0,1,2,4], [0,1,2,5], [0,1,3,4], [0,1,3,5], [0,1,4,5], [0,2,3,4], [0,2,3,5], [0,2,4,5], [0,3,4,5], [1,2,3,4], [1,2,3,5], [1,2,4,5], [1,3,4,5], [2,3,4,5]]</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 combinations (m, n) {
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// Good luck!
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return true;
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}
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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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```js
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console.info('after the test');
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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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