Javascript - OOP BRING IT HOME

Leon Noel

#100Devs

I attended Harlem picnics where you risked your life
Uncle used to skim work, sellin' nicks at night
I was only 8 years old, watching Nick at Nite

Agenda

  • Questions? 

  • Let's Talk -  #100Devs

  • Learn - Objects

  • Learn - Basic OOP Principles

  • Do - Work In Teams: The Four Pillars

  • Do - Work In Teams: Tic-tac-toe

  • Homework - Object City Yall

Questions

About last class or life

Checking In

Like and Retweet the Tweet

!checkin

!newsletter

GIT BOWL

MONDAY
6:30pm EST

Networking - Next Week

Alternatives?

Client Deadline: May 17th

Client Alternatives

Grassroots Volunteer*

Free Software / Open Source

https://www.firsttimersonly.com/

SO CLOSE

Fresh Start

Discord Gold & VIP

!clan

Project & !pokemon

Big News

Music & Light Warning - Next Slide

#100Devs Agency

BUT WHY?

Education Should Be Free

Education Should Provide A  Stipend

Education Should Be Practical

 

OPEN CORE

#100Devs Stream Team

#100Devs Blog


LINK

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Welcome, verolafox

Friday @ 11:00am ET! 

Finna Make Sum Nerds Angry

Objects

What are objects?

Objects

  • Objects are a collection of variables and functions!

  • Objects represent the attributes and behavior of something used in a program

  • Object variables are called properties and object functions are called methods

  • Objects store "keyed" collections

Think of a physical object

What are it's attributes and behaviors? 

Car Factory

Look Ma! New syntax!

class MakeCar{
  constructor(carMake,carModel,carColor,numOfDoors){
    this.make = carMake
    this.model = carModel
    this.color = carColor
    this.doors = numOfDoors
  }
  honk(){
    alert('BEEP BEEP FUCKER')
  }
  lock(){
    alert(`Locked ${this.doors} doors!`)
  }
}

let hondaCivic = new MakeCar('Honda','Civic','Silver', 4)

let teslaRoadster = new MakeCar('Tesla','Roadster', 'Red', 2)

Classes are like templates for objects!

BUT WHY?

Why Use Objects?
Why Would We Need A Factory?

What if there was a system, a paradigm, a set of rules, an agreed upon way to structure our code that:

 

Made it easier to add new stuff

Made it easier to read through what was already coded

And made it so you were not afraid to make changes

 

Music & Light Warning - Next Slide

OOP BABY

OBJECT ORIENTED PROGRAMING 

Let's Talk About It

This fusion of data and functionality into one object

Music & Light Warning - Next Slide

Encapsulation Baby

Encapsulation

The process of storing functions (methods) with their associated data (properties) - in one thing (object)*

*Nerds shaking violently

Complex or unnecessary details are hidden

This enables you to implement things without understanding or even thinking about all the hidden complexity

Smaller more manageable pieces of code

Do stuff once

Music & Light Warning - Next Slide

Abstraction Baby

Abstraction

Hide details

and show essentials

SIMPLE, PREDICTABLE, MANAGEABLE

Create New Objects Based On Old Ones

We just eliminated a bunch of redundant code

AKA

Music & Light Warning - Next Slide

Inheritance BABY

Inheritance

Make a class from another class to share a set of properties and methods

A piece of code that automagically works with a bunch of different objects

 

polymorphism allows us to override a method in every child class so it will do what we want

Instead of conditionals and switch cases

Music & Light Warning - Next Slide

POLYMORPHISM BABY

The Four Pillars

What if they actually made any sense...

Encapsulation

The process of storing functions (methods) with their associated data (properties) in one thing (object)

BUT WHY?

Made it easier to add new stuff

 

Made it easier to read through what was already coded

 

And made it so you were not afraid to make changes

Abstraction

Hide details

and show essentials

BUT WHY?

Smaller more manageable pieces of code

Helps you to split the complexity your software project into manageable parts

Make code changes and still sleep at night

Inheritance

Make a class from another class to share a set of properties and methods

BUT WHY?

Helps you eliminate redundant code

Polymorphism

A piece of code that automagically works with a bunch of different objects

 

polymorphism allows us to override a method in every child class so it will do what we want

BUT WHY?

Helps you avoid if/else and switch cases

Makes your code more reusable

 

Supports The

Other Pillars

Let's Code

Let's Build An Agency

Group Work

https://live.remo.co/e/100devs-networking-night-group-0
https://live.remo.co/e/100devs-networking-night-group-0-1
If Remo does not work for you, please jump into one of our

Discord Voice Channels!

Talk Through OOP

Come up with with a parent class

Extend that parent class into two children

Use Encapsulation, Abstraction, Inheritance, and Polymorphism 

Right Of Passage

https://live.remo.co/e/100devs-networking-night-group-0
https://live.remo.co/e/100devs-networking-night-group-0-1
If Remo does not work for you, please jump into one of our

Discord Voice Channels!

Homework

 

DO: Please review, play, and break the code we go over tonight
DO: Get a paid client, Volunteer, or Contribute To Free Software
DO: FINISH Professional Checklist 

Want To Push (Due: Tues. May 10th)?
Do: Codewars String Ladder (search String problems) - 8kyu, 7kyu, 6kyu, 7kyu, 8kyu