Objects

Objects contain one or more key-value pairs. The key portion can be any string. The value portion can be any type of value: a number, a string, an array, a function, or even another object. When one of these values is a function, it’s called a method of the object. Otherwise, they are called properties.

As it turns out, nearly everything in JavaScript is an object — arrays, functions, numbers, even strings — and they all have properties and methods.

                
                                // Creating an object literal
                              
                              var myObject = {
                            
                                sayHello : function() {
                            
                                  console.log("hello");
                            
                                },
                            
                                myName : "Rebecca"
                            
                              };
                            
                              myObject.sayHello(); // "hello"
                            
                              console.log( myObject.myName ); // "Rebecca"

When creating object literals, note that the key portion of each key-value pair can be written as any valid JavaScript identifier, a string (wrapped in quotes), or a number:

                
                                // test
                              
                              var myObject = {
                            
                                validIdentifier: 123,
                            
                                "some string": 456,
                            
                                99999: 789
                            
                              };

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