Schedule

Schedule

Tuesday, September 30

1412107200 Security Now
1412114400 Before You Buy
1412118000 Tech News 2Night
1412121600 All About Android
1412130600 Padre's Corner

Wednesday, October 1

1412177400 FLOSS Weekly
1412182800 Tech News Today
1412186400 Windows Weekly
1412193600 This Week in Google
1412204400 Tech News 2Night
1412211600 Ham Nation

Thursday, October 2

1412269200 Tech News Today
1412272800 Know How...
1412276400 Marketing Mavericks
1412281800 Coding 101
1412285400 Home Theater Geeks
1412290800 Tech News 2Night
1412292600 The Giz Wiz

Friday, October 3

1412355600 Tech News Today
1412359200 This Week in Law
1412366400 Android App Arena
1412377200 Tech News 2Night

Saturday, October 4

1412445600 The Tech Guy

Sunday, October 5

1412532000 The Tech Guy
1412546400 This Week in Tech

Monday, October 6

1412614800 Tech News Today
1412618400 Triangulation
1412623800 iPad Today
1412636400 Tech News 2Night

Tuesday, October 7

1412701200 Tech News Today
1412704800 MacBreak Weekly
1412712000 Security Now
1412719200 Before You Buy
1412722800 Tech News 2Night
1412726400 All About Android
1412735400 Padre's Corner

Wednesday, October 8

1412782200 FLOSS Weekly
1412787600 Tech News Today
1412791200 Windows Weekly
1412798400 This Week in Google
1412809200 Tech News 2Night
1412816400 Ham Nation

Thursday, October 9

1412874000 Tech News Today
1412877600 Know How...
1412881200 Marketing Mavericks
1412886600 Coding 101
1412890200 Home Theater Geeks
1412895600 Tech News 2Night
1412897400 The Giz Wiz

Friday, October 10

1412960400 Tech News Today
1412964000 This Week in Law

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Coding 101 31

C# Objects and Classes

August 21 2014

Hosts: Fr. Robert Ballecer, SJ and Shannon Morse

Snubs Compiled
Microsoft Visual Studio Express 13 Windows

MonoDeveloper OSX

Ivory Tower
Way back in Episode 6 of the first module of Coding 101, we talked a little about "Object Oriented Programming"
* OOP is an approach to programming that divides the process -- the "problem solving" of a program into modular, reusable pieces.

Before OOP, you wrote your program, then you considered how data might be processed by your code.
* In OOP, you don't think of data seperate from code -- instead, you think of "Objects" which combine code and data. --
** You wrote your code, which then processed data
** OOP unified the two: instead of having data and code, you have a "object" that combines the two.
** Instead of having pieces of code that handle sets of data, you now have OBJECTS that model In-Real-Life logic with In-Real-Life sets of data.

In other words... you code problem-solving, instead of process -- It was a huge jump.
*** Easier to Understand
*** Easier to Maintain
*** Easier to Upgrade

Now let's talk about CLASSES and OBJECTS
* Back in Module 1, we talked about coding functions or "methods"

For Example
"public int answer(int a, int b)
{

int c = a + b;
return c;

}"
** This will create a public function called "answer" that will accept two variables and return an integer value when called.
** We would call this function by writing:
answer(1,2)
** and it would return:
3

That function or "method" combines variables and code that processes those variables

A CLASS combines multiple "methods" and variables.
* A "class" is a blue print that can be created multiple times.
* When the blue print is used to create -- it creates an "OBJECT of that class
* We can create as many objects of a class, and when we're done with it, it's removed from memory.

IMPORTANT!!! --- Don't Interchange "Class" and "Object"
-- A Class is NOT an Object
-- A Class is the blueprint from which an Object is created.
-- A Class DEFINES an object, but it is not an object itself (Can I repeat the same thing more times?)
-- An OBJECT is NOT a class
-- An object is an INSTANCE of a class (based on that "blue print")
-- An object exists in memory ... a class does not (i.e. a class is not "real" until it is used to create an object of that class.)

Defining a Class is easy:
"public class C101
{
//Fields, methods, properties, events... everything in the ""blue print"" goes in here
}"

Creating an OBJECT of a class:
* We use the keyword "new" to create an instance of a class (aka an "object")
* In our example, we've created a class named "C101"
-- If we wanted to create an instance of that class (aka an "object") we would write:
***** "C101 object1 = new C101();"

This will create an instance of the class "C101" called "object1"
* The reason why we write "C101" twice is because we're
1. Creating an REFERENCE to an object, named "object1" that is based on the class "C101"
2. Then we're actually CREATING a "new" instance of the class "C101()" that can be referenced with "object1"

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