Practice makes perfect: create three objects


#1

I'm trying to complete part 12 in Objects and Arrays in JavaScript, and I'm stuck. I've searched for help but still cannot figure out what I'm doing wrong. Thanks in advance!

var object1 = new Object() {
object1.key1 = "Chloe",
object2.key2 = "Misty"
};

var object2 = new Object() {
object2.key1 = "Sparky",
object2.key2 = "Muffin"
};

var object3 = new Object() {
object3.key1 = "Sammy",
object3.key2 = "Lacey"
};


#2

@micromaster54926,
### === the Objects explained ===

- - - B a s i c s - - -

Each Object has one or more properties.
Each property consists of a property-key and it's associated value.

 var object1 = {
              name: "First"
              }

So object1 has 1 property
a name property with property-key name and it's associated string VALUE "FIRST"

OR

var myObj = {
         type: 'fancy',
         disposition: 'sunny'
        }

myObj has 2 properties seperated by a comma-,,
a type property with property-key type and an associated string VALUE 'fancy'
a disposition-property with property-key disposition and
..an associated string VALUE 'sunny'.

= = = = = = = = = = = = = = = = = = = = = = =

To create an Object,

you can use the literal notation,

you directly create an Instance of the object, with the
properties being separated by a comma-,

  var myObj = {
        type: 'fancy',
        disposition: 'sunny' 
  };

OR

You create an Object by the construct notation.

First you create an empty Object by way of either
myObj = new Object(); or myObj = {};
and then you attach its properties using the syntax
object-name.property-key = it's-associated-value ;
( this.name = x ; )

thus:

  var myObj = {};
      myObj.type = 'fancy';
      myObj.disposition = 'sunny';

OR

There is also the facility Class construct notation.

The name should then start with a Capital-letter.

  var Person = function( theName, theAge ) {
         this.name = theName;
         this.age = theAge;
         this.displayInstance = function() {
           console.log("The displayInstance -output-"+
                       "\n============================" +
                     "\n\t name: " + this.name +
                     "\n\t age: " + this.age);
                       };
       };
    //now create an Instance of this Class-object
  var myObj = new Person("Classy_Rocker",20);
    //call the Method displayInstance which takes NO parameters
  myObj.displayInstance();
  console.log( myObj );
  //you can run this in labs.codecademy.com try it !!

As you can see i created a function within this constructor,
they now call this function a Method.
So if in near future the course is asking you to create a method you now know
that you have to create
a property-key with an associated value being a function within an Object.


#3

= = = = = = = = = = = = = = = = = = = = = = = = = = = =

var james = {
    job: "programmer",
   married: false,
   sayJob: function() {
          // complete this method
          console.log("Hi, I work as a" + this.job);
    }
 };

Description of the james object.
The james object has 3 properties and are seperated by a comma-,

there is a job property with property-key job and it's associated string value 'programmer'
there is a married property with property-key married and it's associated boolean value false
there is a sayJob property with property-key sayJob and it's associated anonymous function VALUE
( they also would 'say', the james-object has the sayJob()-Method )

access via dot-notation
james.job ==> you will get the associated string VALUE of the job property-key, thus
you get the string VALUE 'programmer'

james.married ==> you will get the associated boolean VALUE false

james.sayJob ==> you will get the associated anonymous function VALUE
to call/execute this method you add a pair of parenthesis-( )
james.sayJob();

access via the square-bracket-notation
1 using the literal property-key
james["job"]
james["married"]
james["sayJob"]()

2 using the property-key by reference (=== via a variable )
var propertyKey1 = "job";
var propertyKey2 = "married";
var propertyKey3 = "sayJob";
james[propertyKey1] ==> you will get the associated string VALUE of the job property-key, thus
you get the string "programmer"

james[propertyKey2]
in this case you will get the boolean VALUE of the married property
being false

james[propertyKey3]();
would =display= "Hi, I work as a programmer"