JS chapter 17

Objects and inheritance

A JS property is an object with a  key, value pair with maps from string to values.

three types of properties are named data properties, named accessor properties, and internal properties

Use 'this' in methods to refer to current object
use the dot operator to get the properites value (this.name) only fixed property keys
the 'delete' operator removes a property
the 'bracket' operator works with property expressions and returns the value

In JS you can convert any value into an object with 'object()'

Every obj can have another obj as its prototype. This describes the relationship between objs and prototypes
former obj inherits all the prototypes properties
Prototypes are great for sharing data b/w objects

Accessors are the getters and setters 
can be defined as Obj literals or property descriptors

Property attributes are its data and metadata
attr keys are writen in double brackets

define a property using defineProperty() - creates a new or updates
assign via = - reassigns an existing property

Constructors are factories for instances
helpful when producing objs that are similar and want to share data
invoked using 'new'