71 lines
		
	
	
		
			2.2 KiB
		
	
	
	
		
			Markdown
		
	
	
	
	
	
			
		
		
	
	
			71 lines
		
	
	
		
			2.2 KiB
		
	
	
	
		
			Markdown
		
	
	
	
	
	
| ---
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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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| 
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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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| 
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| ## Instructions
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| <section id="instructions">
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| </section>
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| 
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| ## Tests
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| <section id='tests'>
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| 
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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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| ```
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| 
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| </section>
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| 
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| ## Challenge Seed
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| <section id='challengeSeed'>
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| 
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| <div id='js-seed'>
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| 
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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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| ```
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| 
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| </div>
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| 
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| 
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| ### After Test
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| <div id='js-teardown'>
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| 
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| ```js
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| console.info('after the test');
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| ```
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| 
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| </div>
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| 
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| </section>
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| 
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| ## Solution
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| <section id='solution'>
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| 
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| ```js
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| // solution required
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| ```
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| </section>
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