71 lines
2.2 KiB
Markdown
71 lines
2.2 KiB
Markdown
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---
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title: Identity matrix
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id: 5a23c84252665b21eecc7eb1
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challengeType: 5
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videoUrl: ''
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localeTitle: 身份矩阵
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---
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## Description
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<section id="description"> <i>单位矩阵</i>是大小为\（n \次n \）的方阵，其中对角元素都是<b>1</b> s（1），所有其他元素都是<b>0</b> s（零）。 \ begin {bmatrix} 1＆0＆0 \ cr 0＆1＆0 \ cr 0＆0＆1 \ cr \ end {bmatrix}编写一个以数字'n'作为参数并返回单位矩阵的函数订单nx n。 </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>idMatrix</code>应该是一个功能。
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testString: 'assert(typeof idMatrix=="function","<code>idMatrix</code> should be a function.");'
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- text: <code>idMatrix(1)</code>应该返回一个数组。
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testString: 'assert(Array.isArray(idMatrix(1)),"<code>idMatrix(1)</code> should return an array.");'
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- text: '<code>idMatrix(1)</code>应返回<code>"+JSON.stringify(results[0])+"</code> 。'
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testString: 'assert.deepEqual(idMatrix(1),results[0],"<code>idMatrix(1)</code> should return <code>"+JSON.stringify(results[0])+"</code>.");'
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- text: '<code>idMatrix(2)</code>应返回<code>"+JSON.stringify(results[1])+"</code> 。'
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testString: 'assert.deepEqual(idMatrix(2),results[1],"<code>idMatrix(2)</code> should return <code>"+JSON.stringify(results[1])+"</code>.");'
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- text: '<code>idMatrix(3)</code>应返回<code>"+JSON.stringify(results[2])+"</code> 。'
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testString: 'assert.deepEqual(idMatrix(3),results[2],"<code>idMatrix(3)</code> should return <code>"+JSON.stringify(results[2])+"</code>.");'
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- text: '<code>idMatrix(4)</code>应返回<code>"+JSON.stringify(results[3])+"</code> 。'
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testString: 'assert.deepEqual(idMatrix(4),results[3],"<code>idMatrix(4)</code> should return <code>"+JSON.stringify(results[3])+"</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 idMatrix (n) {
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// Good luck!
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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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