107 lines
		
	
	
		
			3.0 KiB
		
	
	
	
		
			Markdown
		
	
	
	
	
	
			
		
		
	
	
			107 lines
		
	
	
		
			3.0 KiB
		
	
	
	
		
			Markdown
		
	
	
	
	
	
| ---
 | |
| id: 56533eb9ac21ba0edf2244c6
 | |
| title: Stand in Line
 | |
| challengeType: 1
 | |
| videoUrl: ''
 | |
| localeTitle: Hacer cola
 | |
| ---
 | |
| 
 | |
| ## Description
 | |
| <section id="description"> En Ciencias de la Computación una <dfn>cola</dfn> es una <dfn>estructura de datos</dfn> abstracta donde los elementos se mantienen en orden. Los nuevos elementos se pueden agregar al final de la <code>queue</code> y los elementos antiguos se quitan de la parte delantera de la <code>queue</code> . Escriba una función <code>nextInLine</code> que tome una matriz ( <code>arr</code> ) y un número ( <code>item</code> ) como argumentos. Agregue el número al final de la matriz, luego elimine el primer elemento de la matriz. La función <code>nextInLine</code> debería devolver el elemento que se eliminó. </section>
 | |
| 
 | |
| ## Instructions
 | |
| <section id="instructions">
 | |
| </section>
 | |
| 
 | |
| ## Tests
 | |
| <section id='tests'>
 | |
| 
 | |
| ```yml
 | |
| tests:
 | |
|   - text: '<code>nextInLine([], 5)</code> debe devolver un número.'
 | |
|     testString: 'assert.isNumber(nextInLine([],5), "<code>nextInLine([], 5)</code> should return a number.");'
 | |
|   - text: '<code>nextInLine([], 1)</code> debe devolver <code>1</code>'
 | |
|     testString: 'assert(nextInLine([],1) === 1, "<code>nextInLine([], 1)</code> should return <code>1</code>");'
 | |
|   - text: '<code>nextInLine([2], 1)</code> debe devolver <code>2</code>'
 | |
|     testString: 'assert(nextInLine([2],1) === 2, "<code>nextInLine([2], 1)</code> should return <code>2</code>");'
 | |
|   - text: '<code>nextInLine([5,6,7,8,9], 1)</code> debe devolver <code>5</code>'
 | |
|     testString: 'assert(nextInLine([5,6,7,8,9],1) === 5, "<code>nextInLine([5,6,7,8,9], 1)</code> should return <code>5</code>");'
 | |
|   - text: 'Después de <code>nextInLine(testArr, 10)</code> , <code>testArr[4]</code> debe ser <code>10</code>'
 | |
|     testString: 'nextInLine(testArr, 10); assert(testArr[4] === 10, "After <code>nextInLine(testArr, 10)</code>, <code>testArr[4]</code> should be <code>10</code>");'
 | |
| 
 | |
| ```
 | |
| 
 | |
| </section>
 | |
| 
 | |
| ## Challenge Seed
 | |
| <section id='challengeSeed'>
 | |
| 
 | |
| <div id='js-seed'>
 | |
| 
 | |
| ```js
 | |
| function nextInLine(arr, item) {
 | |
|   // Your code here
 | |
| 
 | |
|   return item;  // Change this line
 | |
| }
 | |
| 
 | |
| // Test Setup
 | |
| var testArr = [1,2,3,4,5];
 | |
| 
 | |
| // Display Code
 | |
| console.log("Before: " + JSON.stringify(testArr));
 | |
| console.log(nextInLine(testArr, 6)); // Modify this line to test
 | |
| console.log("After: " + JSON.stringify(testArr));
 | |
| 
 | |
| ```
 | |
| 
 | |
| </div>
 | |
| 
 | |
| ### Before Test
 | |
| <div id='js-setup'>
 | |
| 
 | |
| ```js
 | |
| var logOutput = [];
 | |
| var originalConsole = console
 | |
| function capture() {
 | |
|     var nativeLog = console.log;
 | |
|     console.log = function (message) {
 | |
|         logOutput.push(message);
 | |
|         if(nativeLog.apply) {
 | |
|           nativeLog.apply(originalConsole, arguments);
 | |
|         } else {
 | |
|           var nativeMsg = Array.prototype.slice.apply(arguments).join(' ');
 | |
|           nativeLog(nativeMsg);
 | |
|         }
 | |
|     };
 | |
| }
 | |
| 
 | |
| function uncapture() {
 | |
|   console.log = originalConsole.log;
 | |
| }
 | |
| 
 | |
| capture();
 | |
| 
 | |
| ```
 | |
| 
 | |
| </div>
 | |
| 
 | |
| ### After Test
 | |
| <div id='js-teardown'>
 | |
| 
 | |
| ```js
 | |
| console.info('after the test');
 | |
| ```
 | |
| 
 | |
| </div>
 | |
| 
 | |
| </section>
 | |
| 
 | |
| ## Solution
 | |
| <section id='solution'>
 | |
| 
 | |
| ```js
 | |
| // solution required
 | |
| ```
 | |
| </section>
 |