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								---
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								id: 56533eb9ac21ba0edf2244c8
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								title: Accessing Object Properties with Bracket Notation
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								challengeType: 1
							 
						 
					
						
							
								
									
										
										
										
											2019-02-14 12:24:02 -05:00 
										
									 
								 
							 
							
								
									
										 
								
							 
							
								 
							
							
								videoUrl: 'https://scrimba.com/c/cBvmEHP'
							 
						 
					
						
							
								
									
										
										
										
											2018-09-30 23:01:58 +01:00 
										
									 
								 
							 
							
								
							 
							
								 
							
							
								---
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								## Description
  
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								< section  id = 'description' >  
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								The second way to access the properties of an object is bracket notation (< code > []< / code > ). If the property of the object you are trying to access has a space in its name, you will need to use bracket notation.
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								However, you can still use bracket notation on object properties without spaces.
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								Here is a sample of using bracket notation to read an object's property:
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								< blockquote > var myObj = {< br >     "Space Name": "Kirk",< br >     "More Space": "Spock",< br >     "NoSpace": "USS Enterprise"< br > };< br > myObj["Space Name"]; // Kirk< br > myObj['More Space']; // Spock< br > myObj["NoSpace"];    // USS Enterprise< / blockquote >  
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								Note that property names with spaces in them must be in quotes (single or double).
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
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								## Instructions
  
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								< section  id = 'instructions' >  
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								Read the values of the properties < code > "an entree"< / code >  and < code > "the drink"< / code >  of < code > testObj< / code >  using bracket notation and assign them to < code > entreeValue< / code >  and < code > drinkValue< / code >  respectively.
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
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								## Tests
  
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								< section  id = 'tests' >  
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								```yml
							 
						 
					
						
							
								
									
										
										
										
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								tests:
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								  -  text: < code > entreeValue</ code >  should be a string
							 
						 
					
						
							
								
									
										
										
										
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								    testString: assert(typeof entreeValue === 'string' , '< code > entreeValue< / code >  should be a string');
							 
						 
					
						
							
								
									
										
										
										
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								  -  text: The value of < code > entreeValue</ code >  should be < code > "hamburger"</ code > 
							 
						 
					
						
							
								
									
										
										
										
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								    testString: assert(entreeValue === 'hamburger' , 'The value of < code > entreeValue< / code >  should be < code > "hamburger"< / code > ');
							 
						 
					
						
							
								
									
										
										
										
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								  -  text: < code > drinkValue</ code >  should be a string
							 
						 
					
						
							
								
									
										
										
										
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								    testString: assert(typeof drinkValue === 'string' , '< code > drinkValue< / code >  should be a string');
							 
						 
					
						
							
								
									
										
										
										
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								  -  text: The value of < code > drinkValue</ code >  should be < code > "water"</ code > 
							 
						 
					
						
							
								
									
										
										
										
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								    testString: assert(drinkValue === 'water' , 'The value of < code > drinkValue< / code >  should be < code > "water"< / code > ');
							 
						 
					
						
							
								
									
										
										
										
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								  -  text: You should use bracket notation twice
							 
						 
					
						
							
								
									
										
										
										
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								    testString: assert(code.match(/testObj\s*?\[('|")[^'"]+\1\]/g).length > 1, 'You should use bracket notation twice');
							 
						 
					
						
							
								
									
										
										
										
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								```
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								< / section >  
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								## Challenge Seed
  
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								< section  id = 'challengeSeed' >  
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								< div  id = 'js-seed' >  
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								```js
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								// Setup
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								var testObj = {
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								  "an entree": "hamburger",
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								  "my side": "veggies",
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								  "the drink": "water"
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								};
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								// Only change code below this line
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								var entreeValue = testObj;   // Change this line
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								var drinkValue = testObj;    // Change this line
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								```
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								< / div >  
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								### After Test
  
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								< div  id = 'js-teardown' >  
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								```js
							 
						 
					
						
							
								
									
										
										
										
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								(function(a,b) { return "entreeValue = '" + a + "', drinkValue = '" + b + "'"; })(entreeValue,drinkValue);
							 
						 
					
						
							
								
									
										
										
										
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								```
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								< / div >  
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								< / section >  
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								## Solution
  
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								< section  id = 'solution' >  
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								```js
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								var testObj = {
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								  "an entree": "hamburger",
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								  "my side": "veggies",
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								  "the drink": "water"
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								};
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								var entreeValue = testObj["an entree"];
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								var drinkValue = testObj['the drink'];
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								```
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								< / section >