"When you want something done-a calculation, an output operation, a data comparison-you ask an object to do it. We make a "call" these objects and they "respond" to us with some information or an error like "sorry no pizza". We can now see object-oriented programming as simply a way to have us communicate with our program through objects. We tell it something and expect hopefully a response. Programming: This is how we communicate with our computer. These activities as programmers are what? DATA!!! and how we can manipulate them to achieve our desired output. So when we orient out programming around an object, we are simply aligning our day to day activities around this object. Oriented: This means how we align or position something relative to a given thing. The key take-away is that she has default features and more features can be added as well. This could be for instance her agent name. By being a call agent, there are certain attributes she would possess by default. Take note of the word " respond" as we will be using it during the course of this piece. Like our call agent, her state could be that she is of type "call agent" and her behavior is primarily "responding" to calls. The state is the data it holds and the behavior is basically how it "behaves" with that data or any data you feed it. Object: An object is simply anything that has a state, belongs to a type or class, and has some behavior. Well just like in the Classic movie: Sound of Music, we will " start from the very beginning, a very good place to start". So, what exactly does it mean when we say object oriented programming? I am a disciple of the Famous Feynmann Technique: "if you cannot explain it simply, you do not understand it". Please note it doesn't matter the language, the key thing is the underlying concept. Ruby is lovely, beautiful, awesome, splendid. For this piece, we will be using one of my favorite programming languages(hell no it isn't JAVA, lol) ruby. The dialogue above is pretty much what we do each time we interact with an object. Oh sorry sir, we do not have pepperoni pizza. Me: Hello? Hello? oh hi, I am Anthony and I am calling in to know if you have some pepperoni pizza? This is XYZ pizza store right?Īgent: Yes Mr.
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