71 lines
		
	
	
		
			2.0 KiB
		
	
	
	
		
			Markdown
		
	
	
	
	
	
		
		
			
		
	
	
			71 lines
		
	
	
		
			2.0 KiB
		
	
	
	
		
			Markdown
		
	
	
	
	
	
| 
								 | 
							
								---
							 | 
						|||
| 
								 | 
							
								id: 56533eb9ac21ba0edf2244dd
							 | 
						|||
| 
								 | 
							
								title: Selecting from Many Options with Switch Statements
							 | 
						|||
| 
								 | 
							
								challengeType: 1
							 | 
						|||
| 
								 | 
							
								videoUrl: ''
							 | 
						|||
| 
								 | 
							
								localeTitle: 从带有开关语句的多个选项中进行选择
							 | 
						|||
| 
								 | 
							
								---
							 | 
						|||
| 
								 | 
							
								
							 | 
						|||
| 
								 | 
							
								## Description
							 | 
						|||
| 
								 | 
							
								undefined
							 | 
						|||
| 
								 | 
							
								
							 | 
						|||
| 
								 | 
							
								## Instructions
							 | 
						|||
| 
								 | 
							
								<section id="instructions">编写一个switch语句,测试<code>val</code>并设置以下条件的<code>answer</code> : <br> <code>1</code> - “alpha” <br> <code>2</code> - “beta” <br> <code>3</code> - “伽玛” <br> <code>4</code> - “三角洲” </section>
							 | 
						|||
| 
								 | 
							
								
							 | 
						|||
| 
								 | 
							
								## Tests
							 | 
						|||
| 
								 | 
							
								<section id='tests'>
							 | 
						|||
| 
								 | 
							
								
							 | 
						|||
| 
								 | 
							
								```yml
							 | 
						|||
| 
								 | 
							
								tests:
							 | 
						|||
| 
								 | 
							
								  - text: <code>caseInSwitch(1)</code>的值应为“alpha”
							 | 
						|||
| 
								 | 
							
								    testString: 'assert(caseInSwitch(1) === "alpha", "<code>caseInSwitch(1)</code> should have a value of "alpha"");'
							 | 
						|||
| 
								 | 
							
								  - text: <code>caseInSwitch(2)</code>的值应为“beta”
							 | 
						|||
| 
								 | 
							
								    testString: 'assert(caseInSwitch(2) === "beta", "<code>caseInSwitch(2)</code> should have a value of "beta"");'
							 | 
						|||
| 
								 | 
							
								  - text: <code>caseInSwitch(3)</code>的值应为“gamma”
							 | 
						|||
| 
								 | 
							
								    testString: 'assert(caseInSwitch(3) === "gamma", "<code>caseInSwitch(3)</code> should have a value of "gamma"");'
							 | 
						|||
| 
								 | 
							
								  - text: <code>caseInSwitch(4)</code>的值应为“delta”
							 | 
						|||
| 
								 | 
							
								    testString: 'assert(caseInSwitch(4) === "delta", "<code>caseInSwitch(4)</code> should have a value of "delta"");'
							 | 
						|||
| 
								 | 
							
								  - text: 您不应该使用任何<code>if</code>或<code>else</code>语句
							 | 
						|||
| 
								 | 
							
								    testString: 'assert(!/else/g.test(code) || !/if/g.test(code), "You should not use any <code>if</code> or <code>else</code> statements");'
							 | 
						|||
| 
								 | 
							
								  - text: 你应该至少有3个<code>break</code>语句
							 | 
						|||
| 
								 | 
							
								    testString: 'assert(code.match(/break/g).length > 2, "You should have at least 3 <code>break</code> statements");'
							 | 
						|||
| 
								 | 
							
								
							 | 
						|||
| 
								 | 
							
								```
							 | 
						|||
| 
								 | 
							
								
							 | 
						|||
| 
								 | 
							
								</section>
							 | 
						|||
| 
								 | 
							
								
							 | 
						|||
| 
								 | 
							
								## Challenge Seed
							 | 
						|||
| 
								 | 
							
								<section id='challengeSeed'>
							 | 
						|||
| 
								 | 
							
								
							 | 
						|||
| 
								 | 
							
								<div id='js-seed'>
							 | 
						|||
| 
								 | 
							
								
							 | 
						|||
| 
								 | 
							
								```js
							 | 
						|||
| 
								 | 
							
								function caseInSwitch(val) {
							 | 
						|||
| 
								 | 
							
								  var answer = "";
							 | 
						|||
| 
								 | 
							
								  // Only change code below this line
							 | 
						|||
| 
								 | 
							
								
							 | 
						|||
| 
								 | 
							
								
							 | 
						|||
| 
								 | 
							
								
							 | 
						|||
| 
								 | 
							
								  // Only change code above this line
							 | 
						|||
| 
								 | 
							
								  return answer;
							 | 
						|||
| 
								 | 
							
								}
							 | 
						|||
| 
								 | 
							
								
							 | 
						|||
| 
								 | 
							
								// Change this value to test
							 | 
						|||
| 
								 | 
							
								caseInSwitch(1);
							 | 
						|||
| 
								 | 
							
								
							 | 
						|||
| 
								 | 
							
								```
							 | 
						|||
| 
								 | 
							
								
							 | 
						|||
| 
								 | 
							
								</div>
							 | 
						|||
| 
								 | 
							
								
							 | 
						|||
| 
								 | 
							
								
							 | 
						|||
| 
								 | 
							
								
							 | 
						|||
| 
								 | 
							
								</section>
							 | 
						|||
| 
								 | 
							
								
							 | 
						|||
| 
								 | 
							
								## Solution
							 | 
						|||
| 
								 | 
							
								<section id='solution'>
							 | 
						|||
| 
								 | 
							
								
							 | 
						|||
| 
								 | 
							
								```js
							 | 
						|||
| 
								 | 
							
								// solution required
							 | 
						|||
| 
								 | 
							
								```
							 | 
						|||
| 
								 | 
							
								</section>
							 |