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reading-notes

CodeFellows Class Reading Notes

Domain modeling is the process of creating a conceptual model in code for a specific problem.

A model describes the various entities, their attributes and behaviors, as well as the constraints that govern the problem domain.
An entity that stores data in properties and encapsulates behaviors in methods is commonly referred to as an object-oriented model.

Object Oriented Programming - Step by Step

The new keyword instantiates (i.e. creates) an object.
The constructor function initializes properties inside that object using the this variable.
The object is stored in a variable for later use.

Final Take Aways

When modeling a single entity that’ll have many instances, build self-contained objects with the same attributes and behaviors.
Model its attributes with a constructor function that defines and initializes properties.
Model its behaviors with small methods that focus on doing one job well.
Create instances using the new keyword followed by a call to a constructor function.
Store the newly created object in a variable so you can access its properties and methods from outside.
Use the this variable within methods so you can access the object’s properties and methods from inside.

HTML tables are written row by row:

<table> element used to create table

<tr> table row: indicates the start of a row

<td> table data (or <td> for a table heading)

table cell: individual block in a grid

colspan: attribute that can be used on a <th> or <td> element to indicate how many columns it should run across

rowspan: attribute that can be used on a <th> or <td> element to indicate how many rows it should span down

<thead> <tbody> <tfoot> elements can be used between <table> and <tr> to differentiate portions of the table to help with CSS styling

The new keyword and the Object() constructor create a blank object that you can then add properties and methods to.

You can update the values of a property using dot notation or square brackets

The delete keyword will delete a property

Object Constructors use a function as a template for creating objects

the name of a constructor function usually begins with a capital letter to help remind developers to use the new keyword when they create an object using that function

Browser Object Model contains objects that represent the current browser window or tab

Document Object Model uses objects to create a representation of the current page

Global JavaScript Objects represent things the JS language needs to create a model of