# { Objects in Javascript }


## What's an Object?
Objects are JavaScripts most fundamental datatype.

An object in javascript is a **collection** of **unordered** **key-value pairs**, and those values can be other primitve types or other objects.


```js
// ...
{
  "type": "articles",
  "id": "1",
  "attributes": {
    "title": "Rails is Omakase"
  },
  "relationships": {
    "author": {
      "links": {
        "self": "/articles/1/relationships/author",
        "related": "/articles/1/author"
      },
      "data": { "type": "people", "id": "9" }
    }
  }
}
// ...
//Javascript object example
``` 
## Creating Objects

Objects can be created with:

1. Object literal
```js
let Obj = {
         "firstname" : "John",
         "lastname": "Despa",
         "age": 30
}
```
2. new Keyword

```js
        let newObj = new Object(); //creates an empty object

```
3. Object.create() function

```js
        let newObj = Object.create({a: 1, b: 2});
```
This method uses it's first argument as the prototype of the newly created object.

## Querying and Setting properties

```js
      let Obj =  {
	     color: "red",
	     value: "#f00"
     }

   //accessing a value
  // Obj.color => "red"
  // Obj["value"] => "#f00"
  // Obj.color = "blue" => change a value or create new key-value pair if doesn't exist

```
When using square bracket notation the expression should be a string or value that can be converted to a string

## Deleting properties

Properties can be deleted using the **delete** operator.
```js
       delete Obj.color 
                     or
       delete Obj["color"]
   
 // delete the color property
```

The delete expression will evaluate to **true** if the delete was successful or if the property didn't exist or even when used with a value that is not a property in object.