// Testing the type of various variables
                              
                            
                          
                          

                            

                              var myFunction = function() {
                            
                          
                          

                            

                                console.log("hello");
                            
                          
                          

                            

                              };
                            
                          
                          

                            

                              var myObject = {
                            
                          
                          

                            

                                  foo : "bar"
                            
                          
                          

                            

                              };
                            
                          
                          

                            

                              var myArray = [ "a", "b", "c" ];
                            
                          
                          

                            

                              var myString = "hello";
                            
                          
                          

                            

                              var myNumber = 3;
                            
                          
                          

                            

                               
                            
                          
                          

                            

                              typeof myFunction; // "function"
                            
                          
                          

                            

                              typeof myObject;   // "object"
                            
                          
                          

                            

                              typeof myArray;    // "object" -- Careful!
                            
                          
                          

                            

                              typeof myString;   // "string"
                            
                          
                          

                            

                              typeof myNumber;   // "number"
                            
                          
                          

                            

                              typeof null;       // "object" -- Careful!
                            
                          
                          

                            

                               
                            
                          
                          

                            

                              if ( myArray.push && myArray.slice && myArray.join ) {
                            
                          
                          

                            

                               
                            
                          
                          

                            

                                // probably an array (this is called "duck typing")
                            
                          
                          

                            

                              }
                            
                          
                          

                            

                               
                            
                          
                          

                            

                              if ( Object.prototype.toString.call( myArray ) === "[object Array]" ) {
                            
                          
                          

                            

                               
                            
                          
                          

                            

                                // Definitely an array!
                            
                          
                          

                            

                                // This is widely considered as the most robust way
                            
                          
                          

                            

                                // to determine if a specific value is an Array.
                            
                          
                          

                            

                              }