And now let's talk about some Object Orientated Programming basics. Now anytime we're talking about Object Orientated Programming, we're talking about a certain way of setting up a program and the benefits that it gets us. Now to understand this really, take a look at a couple of videos I did in a separate part of the course, called Object Orientated Development part 1 and 2. And this will kind of give you a little chalk talk and then a visual and then in this video I want to talk about what all that type of programming actually gets us. Well, when you think about the old way that we used to program, we used to write sequential lines of code that ran from beginning to end and we numbered them, 10, 20, 30, 40, 50, 60. And when we started our program it ran from top to bottom and it branched to other lines of code when necessary and it was often quite necessary, quite often to branch around. And so this stuff became known as Spaghetti Code and it was kind of hard to follow, hard to troubleshoot, hard to update, and code that was repeatedly run, later got grouped into Subroutines. That helped the organization a little bit but it was still very difficult to maintain, very difficult to update and Object Orientated Programming came along and it began to break the program into individual objects, similar to real world operation. And so if it was a Real World Object, we made it a Software Object. And each object in our program is totally separate from the rest of the program. These are discreet little sections of code, that come into being and take up spot in memory as a little collected set of functionalities and then they go away. Objects are created in memory when needed and then we discard them when we're done with them. Objects contain the various code functionalities that are unique to the operation and the current state of that object. So we can change properties on the object and again, if you've already watched the videos on Object Orientated Development, you know what I'm talking about here about maintaining state and code functionalities. Let's take an example here. We want to bake a pizza. If I go into my kitchen and begin to bake a pizza, what am I going to do? Well I'm going to work with some objects. There's going to be an oven that I have to work with, a pizza that I have to work with and then a person, which is me that I'm going to have to work with. Now each object is independent of the others. The pizza and the oven are not related except that the oven takes actions on the pizza and causes changes to happen. I'm a person, I make changes on the oven and the pizza, that makes changes happen and so forth. Each object can be created when needed. In this instance, we created an oven when we needed it and we installed it in the house and then I can carry on functionalities when I need it. The pizza was created when needed. Somebody created it because they needed to sell it. I bought it because I needed to eat it and then I'm going to use the oven that was created when I'm ready to prepare it. The person was created, we won't get into all that. Alright. Now each object can be updated or changed without effecting the others. If I call a repair man out and he makes a change to my oven, he does not effect either me or the pizza. He will effect the operation of the oven that could effect me, where he has to say now look. This is the way you used to turn it on. This is the way you do it now. Same thing with the pizza. If they change the pizzas, we may get a new pizza that requires a different cooking time. Now each object in Object Orientated Programming is going to have certain characteristics and these are fundamental to Object Orientated Programming and it's why we got into this business and this is the real beauty and power of Object Orientated Programming. And that is first of all, Abstraction. Now there is a lot more characteristics I'm just kind of hitting the high points here. The user does not need to understand how actions are carried out. I don't know how an oven works, don't know what makes it work. I just know that if I turn certain knobs, it gets hot in there. And if I turn another knob I can determine how hot it gets and so then I can use it. Classification, objects are classified, grouped and related for code reuse and for organization. My kitchen's very well organized. There's an oven and anything that has to do with cooking, has to do with the oven, there's the pizza. Anything that has to do with eating pizza, enjoying pizza, storing pizza, has to do with the pizza. And then there's me. And there's a whole Classification there that we won't get into a usable interface. Objects have to expose functionality in a simple manner. I know how to operate an oven. I could probably come to your house and operate your oven with just a little bit of thought, because ovens all expose a similar, simple interface. Usually knobs that cause things to get hot. The interface is all the end user should understand. It's all they should be required to understand. I should not have to understand how they make pizzas, where cheese comes from. How to manufacture cheese, tomato sauce, any of that stuff. I should just know the interface on a pizza which is, cut the plastic open, put it in the oven for the set amount of time. On the oven, the interface is pretty simple. It's those knobs on the top. I should be able to figure out, turn certain knobs, make certain things get hot. That's what we want to accomplish with Object Orientated Programming. Each one of our real world objects is recreated in a software model and it has these characteristics and actually a few more. But this is what we're headed toward and this makes your program much, much easier to update, much, much easier to maintain and much, much easier to troubleshoot. And so in the next few videos, we're going to delve into some of these things and talk about some other aspects of Object Orientated Programming.
TERMS & CONDITIONS OF USE
BY SUBSCRIBING TO THIS SERVICE, YOU ARE CONSENTING TO BE BOUND BY AND ARE BECOMING A PARTY TO THIS AGREEMENT, THE TERMS AND CONDITIONS OF WHICH SHALL PREVAIL IN GOVERNING YOUR RIGHTS OF USE. BY CLICKING THE "BECOME A MEMBER" BUTTON, THE INDIVIDUAL OR ENTITY LICENSING THE PRODUCT ("YOU") IS CONSENTING TO BE BOUND BY AND IS BECOMING A PARTY TO THIS AGREEMENT. IF LICENSEE DOES NOT AGREE TO ALL OF THE TERMS OF THIS AGREEMENT, THE BUTTON INDICATING "BECOME A MEMBER" MUST NOT BE SELECTED, AND LICENSEE MUST NOT INSTALL OR USE THE SOFTWARE.
"VTC" refers to Virtual Training Company,
"You" refers to the user or subscriber.
"Software" refers to the VTC training content and software.
2. LICENSE: VTC hereby grants to You a worldwide, non-royalty bearing, non-exclusive license to use the Software according to the provisions contained herein and subject to payment of the applicable subscription fees.
3. RESTRICTIONS: You may not do any of the following:
Save the Software to Your hard disk or other storage
medium; permit others to use the Software except as specified by addendum;
modify, reverse engineer, decompile, or disassemble the Software; make
derivative works based on the Software; publish or otherwise disseminate
the Software. VTC, Inc., VTC Online University, and the Virtual Training
Company site is owned and operated by VTC, Inc. as a corporation of
All materials on this site are the property of VTC unless otherwise specified. No material from these pages may be copied, reproduced, republished, downloaded, uploaded, posted, transmitted, or distributed in any way. Modification of the materials or use of the materials for any other purpose is a violation of U.S. copyright law and other proprietary rights. For purposes of this Agreement, the use of any such material on any other web site or networked computer environment is prohibited.
4. FEES: The rights granted under this Agreement
are effective only upon payment of the subscription fees, which are
strictly non-refundable other than as expressly provided herein. The
term "monthly subscription" is defined as any 30 day period.
The term "yearly subscription" is defined as one 365 day
period. A yearly subscription ends on the same numerical date as it
began (example July 28, 2004 to July 28, 2005).
The VTC Online University is access to every VTC training tutorial in our library. You pay a flat fee for access to these titles. You are billed according to your renewal selection below, and can renew monthly, yearly, or in any other increment offered. If you choose to be billed monthly, you will be billed every 30 days for the subscription until you request the subscription be cancelled. Our terms of service state that you must cancel a monthly subscription at least two business days before your renewal date. These two days give us enough time to ensure that you will not be charged again.
5. LIMITED WARRANTY: VTC warrants that the Software, if operated as directed, will substantially achieve the functionality described. VTC does not warrant, however, that Your use of the Software will be uninterrupted or that the operation of the Software will be error-free or secure. In addition, the security mechanisms implemented by the Software have inherent limitations, and You must determine that the Software sufficiently meets Your requirements. VTC also warrants that the media containing the Software, if provided by VTC, is free from defects in material from the date You acquired the Software. VTC's sole liability for any breach of this warranty shall be, in VTC's sole discretion: (i) to replace Your defective media or Software; or (ii) to advise You how to achieve substantially the same functionality with the Software as described; or (iii) if the above remedies are impracticable, to refund the subscription fee You paid for the Software. Only if You inform VTC of Your problem with the Software during the applicable subscription period will VTC be obligated to honor this warranty. VTC will use reasonable commercial efforts to repair, replace, advise, or refund pursuant to the foregoing warranty within thirty (30) days of being so notified. If any modifications are made to the Software by You during the warranty period; if the medium is subjected to accident, abuse, or improper use; or if You violate the terms of this Agreement, then this warranty shall immediately terminate. This warranty shall not apply if the Software is used on or in conjunction with hardware or software other than the unmodified version of hardware and software with which the Software was designed to be used as described.
THIS IS A LIMITED WARRANTY, AND IT IS THE ONLY WARRANTY MADE BY VTC OR ITS SUPPLIERS. VTC MAKES NO OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NONINFRINGEMENT OF THIRD PARTIES' RIGHTS. YOU MAY HAVE OTHER STATUTORY RIGHTS. HOWEVER, TO THE FULL EXTENT PERMITTED BY LAW, THE DURATION OF STATUTORILY REQUIRED WARRANTIES, IF ANY, SHALL BE LIMITED TO THE ABOVE LIMITED WARRANTY PERIOD. MOREOVER, IN NO EVENT WILL WARRANTIES PROVIDED BY LAW, IF ANY, APPLY UNLESS THEY ARE REQUIRED TO APPLY BY STATUTE NOTWITHSTANDING THEIR EXCLUSION BY CONTRACT. NO DEALER, AGENT, OR EMPLOYEE OF VTC IS AUTHORIZED TO MAKE ANY MODIFICATIONS, EXTENSIONS, OR ADDITIONS TO THIS LIMITED WARRANTY.
6. PROPRIETARY RIGHTS: VTC reserves all proprietary rights in and to the Software, is protected by copyright and other intellectual property laws and by international treaties. VTC, Inc.
Trademark Notice: VTC, Virtual Training Company,
Inc., The VTC Logo, and VTC Online University, are trademarks of VTC,
Inc. All other company and product names may be trademarks of their
The information contained herein is subject to change without notice. Copyright © 1995 - 2005 VTC, Inc. All rights reserved.
7. TERMINATION: This Agreement shall automatically terminate if You fail to comply with the restrictions described herein. Your obligations to pay outstanding subscription fees shall survive any termination of this Agreement.
8. LIMITATION OF LIABILITY: UNDER NO CIRCUMSTANCES
AND UNDER NO LEGAL THEORY, TORT, CONTRACT, OR OTHERWISE, SHALL VTC
OR ITS SUPPLIERS OR RESELLERS BE LIABLE TO YOU OR ANY OTHER PERSON
FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES OF
ANY CHARACTER, INCLUDING WITHOUT LIMITATION, DAMAGES FOR LOSS OF GOODWILL,
WORK STOPPAGE, COMPUTER FAILURE OR MALFUNCTION, OR ANY AND ALL OTHER
COMMERCIAL DAMAGES OR LOSSES. IN NO EVENT WILL VTC BE LIABLE FOR ANY
DAMAGES IN EXCESS OF THE AMOUNT VTC RECEIVED FROM YOU FOR A LICENSE
TO THE SOFTWARE, EVEN IF VTC SHALL HAVE BEEN INFORMED OF THE POSSIBILITY
DAMAGES, OR FOR ANY CLAIM BY ANY OTHER PARTY. THIS LIMITATION OF LIABILITY SHALL NOT APPLY TO LIABILITY FOR DEATH OR PERSONAL INJURY RESULTING FROM VTC'S NEGLIGENCE TO THE EXTENT APPLICABLE LAW PROHIBITS SUCH LIMITATION. SOME JURISDICTIONS DO NOT ALLOW THE EXCLUSION OR LIMITATION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO THIS EXCLUSION AND LIMITATION MAY NOT APPLY TO YOU.
9. Links To Other Materials: Linked sites found at the VTC site are not under the control of VTC, and we are not responsible for the content of any linked site or any link contained in a linked site. VTC may change links based solely on our discretion, and we reserve the right to terminate any link or linking program at any time. VTC does not, by linking to sites, endorse companies or products to which it links and reserves the right to note as such on its web pages. If you decide to access any of the third party sites linked to this site, you do this entirely at your own risk.
Forums, and Chat are not always screened by VTC, and we are not responsible for the content of any public or open forum content at the site. VTC may change these public forums based solely on our discretion, and we reserve the right to terminate any forum at any time. VTC does not, by allowing these forums, endorse companies or products which may be mentioned in these forums, and reserves the right to note as such on its web pages. If you decide to access any of the public forums in this site, or linked to this site, you do this entirely at your own risk.
9. GOVERNING LAW & DISPUTE RESOLUTION: This Agreement is governed by Virginia law. All disputes between You and VTC shall be finally resolved through arbitration in Winchester, Virginia. This site is controlled by VTC from its offices within the United States of America. VTC makes no representation that materials in the site are appropriate or available for use in other locations, and access to them from territories where their content is illegal is prohibited. Those who choose to access this site from other locations do so on their own initiative and are responsible for compliance with applicable local laws. You may not use or export the Materials in violation of U.S. export laws and regulations. Any claim relating to the Materials shall be governed by the internal substantive laws of the Commonwealth of Virginia, USA.
VTC may revise these Terms at any time by updating this posting. You should visit this page from time to time to review the then-current Terms because they are binding on you. Certain provisions of these Terms may be superseded by expressly designated legal notices or terms located on particular pages at this Site.
If you have any questions regarding this policy,
or your information specifically,
you may email us at:email@example.com.