This document provides an introduction to object-oriented programming concepts like classes, objects, properties, methods, constructors, collections, inheritance, polymorphism, and events. It uses a human as an example object to demonstrate these concepts, defining properties like height, weight, eye color, and methods like walk, talk, go to sleep, and cry. Code examples are provided to instantiate human objects and call their methods. Key OOP concepts like how properties and methods are implemented as functions under the hood, how collections contain groups of objects, and how events can be thrown and caught are also briefly explained.

1. Intro into OOP
Dina Neishtadt

2. Who am I?
● Product Manager & Software Engineer
● Industrial Designer
● Tinkerer and Maker
Checkout my website: www.dinkaworks.com

3. How much code do we have
A lot.

4. Spaghetti code?
Functions were invented
But that wasn’t enough...

5. Whats everything in life?
Its an object.

6. What comprises an object?
● Things that describe it (properties or attributes)
● Things that the object can do or can be done to it (actions, methods or
functions)

7. What defines an object?
A class is what describes that MyObject comprises of and how MySpecific
object will be born to life, instantiated (constructor).

8. Lets take a human as an object
● Constructor - give birth to a single human (mostly), the constructor is a
function that will return the object Human upon its completion
● Properties (describe the object)
o Height (float)
o Weight (float)
o EyeColor (String)
o Sex (boolean)
o IsCryingNow (boolean)
● Methods
o Walk
o Talk
o GoToSleep
o Cry(true/false)

9. This is how typically a code using a Human will look:
Human myHumanChild = new Human(typeChild);
Human myHumanAdult = new Human(typeAdult);
myHumanChild.Walk();
myHumanChild.EyeColor = “blue”;
If (myHumanChild.IsCryingNow = true){
….
}
else{
myHumanChild.Cry(true);
How typically code looks

10. How to code all of this?
Properties, Methods and constructors are actually just functions.
The distinction is in our minds, to make it easier to understand (in most
languages).

11. Collections
A collection is a number of objects.
For instance:
Humanity (plural) contains many Humans (single).
Collections can have a designated data type in some languages, or be just
arrays of objects or array lists.

12. Inheritance

13. Polymorphism
Human.DoSomething(what)
Human.DoSomething(string what)
Human.DoSomething(string what, int volume)
Human.DoSomething(string what, int volume, int repeat)

14. Throwing Events
Something happened - system or custom.
Example:
● Human cried
● Mouse clicked
Professional term is: Throwing an event

15. Catching Events
Something happened - system or custom.
● Lets LISTEN to that event.
● Write an event handler (just another function)

16. Any Questions?

17. Thank you!