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								---
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								id: 5d792533cc8b18b6c133edc7
							 
						 
					
						
							
								
									
										
										
										
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								title: Part 6
							 
						 
					
						
							
								
									
										
										
										
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								challengeType: 0
							 
						 
					
						
							
								
									
										
										
										
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								dashedName: part-6
							 
						 
					
						
							
								
									
										
										
										
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								---
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								
							 
						 
					
						
							
								
									
										
										
										
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								# --description--
  
						 
					
						
							
								
									
										
										
										
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											2019-12-09 19:37:02 +09:00 
										
									 
								 
							 
							
								
									
										 
								
							 
							
								 
							
							
								Anonymous functions are often passed as arguments to other functions, but what if you want to call one later? You can assign anonymous functions to variables and call them with the variable's name:
							 
						 
					
						
							
								
									
										
										
										
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								```js
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								const fn = function(x) {
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								  return x;
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								}
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								fn();
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								```
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								
							 
						 
					
						
							
								
									
										
										
										
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								Assign the anonymous function to the variable `addVar` .
							 
						 
					
						
							
								
									
										
										
										
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								# --hints--
  
						 
					
						
							
								
									
										
										
										
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								See description above for instructions.
							 
						 
					
						
							
								
									
										
										
										
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								```js
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								assert(code.replace(/\s/g, '').includes('constaddVar=function(x,y){returnx+y'));
							 
						 
					
						
							
								
									
										
										
										
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								```
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								
							 
						 
					
						
							
								
									
										
										
										
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								# --seed--
  
						 
					
						
							
								
									
										
										
										
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								## --before-user-code--
  
						 
					
						
							
								
									
										
										
										
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								```html
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								<!DOCTYPE html>  
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								< html  lang = "en" >  
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								< head >  
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								  < meta  charset = "UTF-8" > 
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								  < title > Spreadsheet< / title > 
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								  < style > 
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								    #container  {
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								      display: grid;
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								      grid-template-columns: 50px repeat(10, 200px);
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								      grid-template-rows: repeat(11, 30px);
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								    }
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								    .label {
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								      background-color: lightgray;
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								      text-align: center;
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								      vertical-align: middle;
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								      line-height: 30px;
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								    }
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								  < / style > 
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								< / head >  
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								< body >  
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								< div  id = "container" >  
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								  < div > < / div > 
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								< / div >  
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								```
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								
							 
						 
					
						
							
								
									
										
										
										
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								## --after-user-code--
  
						 
					
						
							
								
									
										
										
										
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								```html
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								< / body >  
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								< / html >  
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								```
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								
							 
						 
					
						
							
								
									
										
										
										
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								## --seed-contents--
  
						 
					
						
							
								
									
										
										
										
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								```html
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								< script >  
						 
					
						
							
								
									
										
										
										
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								function add(x, y) {
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								  return x + y;
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								}
							 
						 
					
						
							
								
									
										
										
										
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								const infixToFunction = {};
							 
						 
					
						
							
								
									
										
										
										
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								< / script >  
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								```
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								# --solutions--
  
						 
					
						
							
								
									
										
										
										
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								```html
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								< script >  
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								const addVar = function(x, y) {
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								  return x + y;
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								};
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								const infixToFunction = {};
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								< / script >  
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								```