A basic question of class

Hello guys,
i'm new hand and i got this question but i'm not sur of the answer, any help would be welcome :)
The correct statement(s) are:
a: a class is an instance factory
b: a class is a template for creating an entity
c: a class is a set of all the instances of a pattern
d: none of the above

It is A or B. I'm not sure which one though because it is a strange question.
A class is a piece of code that creates objects. It's like a factory that produces a certain type of object. It is like the blueprints. Every building has blueprints. When the builders build a building they look at the blueprints to see how it is done. The compile looks at a class as blueprints on how to make something. Think of Terminator 2. One class would create the t1000 robots and another class would create the t2000 robots.
I hope that helps. I think that A and B could be equally right.

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Basic Questions on UITableView

Hi, I'm trying to learn the iPhone API by creating a simple table application and I have some basic questions. There are stuff in the example code and the docs that seem to contradict, and I'm hoping some people can clarify.
1) Table View Programming for iPhone OS, it says that UITableView must have a delegate and a source. I take it that in the example code (let's use TableCellSubivews) RootViewController is the source and TableViewCellSubviews is the delegate?
2) If so, why does TableViewCellSubviews adopt the UIApplicationDelegate protocol and not UITableViewDelegate? In fact, I don't think any of the classes in the example code adopt UITableViewDelegate.
3) In the UITableViewDelegate reference, it names didSelectRowAtIndexPath as a method. In the example code, why is in the didSelectRowAtIndexPath a method in the RootViewController, and not the delegate itself?
Thanks for any explanations that anyone can give to help a noob!

{quote}
1) Table View Programming for iPhone OS, it says that UITableView must have a delegate and a source. I take it that in the example code (let's use TableCellSubivews) RootViewController is the source and TableViewCellSubviews is the delegate?
{quote}
There are 3 things that need to be done when setting up a tableview:
1- the tableview controller itself, which determines how the tableview is set up, decides on the view, etc..
2- the data source: the controller in 1) above needs to ask someone "give me the cell with the data for row #x. That's the job of the data source
3- The delegate: some things for the table view need visible stuff such as the height of a row, whether a row should have a checkmark, etc... That's the job of the delegate.
Now what often happens is that people do not specify a data source nor a delegate. What this means is that the controller performs all 3 jobs. Again, if the controller does not specify its delegate (or no class registers as its delegate), then the controller acts as its own delegate. (that answers your second question)
{quote}
3) In the UITableViewDelegate reference, it names didSelectRowAtIndexPath as a method. In the example code, why is in the didSelectRowAtIndexPath a method in the RootViewController, and not the delegate itself?
{quote}
That's a tricky question.
The thing is that both the data source AND the delegate adopt a method called didSelectRowAtIndexPath. But they're for very different purposes. For the delegate, it's simply a notification by the controller that "hey, this row was selected, you may want to do something with it", i.e. change the color of the font, add a checkmark, etc...
For the data source, it's much more important (and required!): the controller is saying "hey, someone requested row #x. Please give it to me!" This includes getting all the data and setting up the whole row, then returning it to the controller.
Hope this helps clear things up.

Basic questions of structure Alchmy inside the AVM ans corePlayer ? Help!

Hello community:)
Flash Player 10 has been amended in order to run the new code from the compilation Alchemy! Is this correct?
The new ABC Alchemy is for new features such as memory pointer, asynchronous functions? is that correct? and what else?
This amendment consists of a small AVM separated from the Tamarin ? where everything is in Tamarin?
The memory allocated to code from Alchemy is separated from the memory area allocated to the AVM and PlayerCore? it is like that?
The CorePlayer flashRuntime and had to be changed?
The ABC from Alchemy is intended only as to the AVM? or also to CorePlayer?
Alchemy can access the BIOS? especially for 33h the mouse? if not, is it possible to control the mouse in one way or another with Alchemy?
Immagine it would create a code C to produce sound from a bytesArray to replaceSampleData AS3 class, it's possible? If not, why? a restriction of the sandbox?
Can be added directly to the assembler code using Alchemy? or it's prohibited because of the respect of cross platefrom?
Thank you for maximum responses! although one can easily imagine some answers, I have confirmation:)
Too many people claim things on forums, affirmative behave as if it was the system programmers themselves FlashPlayer! Outside, people sometimes give wrong answers! Two days ago, I had a guy who claimed that the AVM does not compile ABC! The ABC was executed directly . It's sad and a shame to read such things. He obviously did not read and do not know the JIT
This post is aimed at people on what they say and who were able to verify the information. Alchemy or programmers themselves.
Thank you all!

In order to understand things and not waste our time trying to code without knowing ifthey are not working because of am or even if it is because it is not impossible or not the player, I'm posted this on the forum Player. But my post is not answered .. Adobe programmers never come on this forum? Nobodyknows exactly how it works?
Hello everyone
I have some basic questions about the Flash player and AVM2..
I made this little flow chart for Player 9 and above >
Can anyone tell me if it is consistent and fair to me or to report a possible error?
AVM2 the only accessing the CPU and Ram? and in no event in the device or OS API, right?
The AVM2 in our current players is always a Tamarin?
The next step is to replace the JIT by the nanoJIT spiderMonckey?
The byteCode from Alchemy is well executed in the AVM and not elsewhere?
The memory area codes assigned to Alchemy is the same as that of the AVM or is it different andseparate?
Thank you for your answers.
Gordially, Alain.

OC4J 9.0.4 stand alone - basic questions

Hi,
I'm upgrading my web applications from OC4J (1.0.2.2) to OC4J 9.0.4.
I have a few basic questions. Since I asked these as part of another thread and didn't get a response, I thought starting a new thread might help...
1. Does the JSP compiler in OC4J 9.0.4 (JSP container) work with the JDK version set in the path ? (I'm not using OJSP).
2. I read that OC4J 9.0.4 is J2EE 1.3 compliant. With OC4J 1.0.2.2 , I used the j2ee.jar file (that was bundled with J2SDKEE 1.3) to compile my Servlets/Struts code. I copied it into the OC4J_HOME directory and set the Classpath to it, to build my classes.
With 9.0.4, can I still use this j2ee.jar file or do I need to use the jar files (Servlet.jar) in the OC4J_HOME/lib directory?
3. Could somebody throw some light on why some jar files are placed in OC4J_HOME while others are in the OC4J_HOME/lib directory ? What is the difference?
Any help/suggestions will be greatly appreciated.
Thanks,
Shyam

Hi, shyam:
It is nice to raise different questions in different threads.
1. Does the JSP compiler in OC4J 9.0.4 (JSP container) work with the JDK version set
in the path ? (I'm not using OJSP).I believe you are referring to the runtime JSP engine, which compiles your JSP when you first access it. The answer is yes.
To see the compilation setting when oracle jsp engine is compiling jsp files, start oc4j with the debug flag:
java -Dbuild.debug=true -jar oc4j.jar
2. I read that OC4J 9.0.4 is J2EE 1.3 compliant. With OC4J 1.0.2.2 , I used the
j2ee.jar file (that was bundled with J2SDKEE 1.3) to compile my Servlets/Struts code.
I copied it into the OC4J_HOME directory and set the Classpath to it, to build my
classes. With 9.0.4, can I still use this j2ee.jar file or do I need to use the jar files
(Servlet.jar) in the OC4J_HOME/lib directory?Not sure what to say about j2ee.jar of j2SDKEE1.3 since I have never used it. For Servlet code, they are pure java code as long as you use the right libraries. Use the one in OC4J_HOME/lib if possible, although it probably does not matter much. For JSP file, there is no problem of compilation if you do not want to precompile them. All you need is packaging them and deploying them.
3. Could somebody throw some light on why some jar files are placed in OC4J_HOME
while others are in the OC4J_HOME/lib directory ? What is the difference?The executable jars are in OC4J_HOME directory. Besides that, I do not see see much difference.

One very basic question about inheritance

One very basic question about inheritance.
Why we need inheritance?
the benefit of inheritance also achieve by creating instance of base class using it in other class instead of extending the base class.
Can any one please explain why we are using inheritance instead of creating object of base class????

SumitThokal wrote:
One very basic question about inheritance.
Why we need inheritance?
the benefit of inheritance also achieve by creating instance of base class using it in other class instead of extending the base class.
Can any one please explain why we are using inheritance instead of creating object of base class????What did you find out when you looked on Google?
One example of inheritance comes in the form of a vehicle. Each vehicle has similarities however they differ in their own retrospect. A car is not a bus, a bus is not a truck, and a truck is not a motorbike. If you can define the similarities between these vehicles then you have a class in which you can extend into either of the previous mentioned vehicles. Resulting in a reusable class, dramatically reduces the size of code, creates a single point of definition, increases maintainability, you name it.
In short there are thousands of benefits from using inheritance, listing the benefits could take a while. A quick Google search should give you a few hundred k if not million links to read.
Mel

Is JMF a failed concept ? basic question

I have been researching to embed a JMF app on an applet for nearly 2 months. i have also read most questions on this forums thats related to this topic.
Almost every one says to use java web start than using an applet. and most of the people in the forum has not got a solution to there problem, that is to add audio/video chat to an applet.
I too have a issue in adding a audio/video chat to an applet. but still almost every one encouraged me to use java webstart.
Further more there are no successful example in the net where you can add a audio/video chat into an applet. Most of the sample code given don't even work.
My problem is that, Why doesn't jmf work on applets ?? have some one tried using this method, and has it worked ?? and why does people in this forum encourage others to use java web start instead of applets ? and finally does sun want to turn down the concept of using applets ???
note: I might had asked a stupid question, if so my apologies._

The cross-platform version of JMF works just fine in embedded applets(1), it is the Performance Pack that can be a hassle to get working. The JMF PP would need to be installed on the users computer, to get the natives in a place they can be used.
Having said that, the "This computer needs to reboot" message at the end of the JMF installer puts a bit of a damper on that. Who wants to use an applet that requires them to reboot the PC before use?
Also, I've heard that even after that, many users visit the JMF test applet to have it report that the JMF classes are not found. Since I have little interest in deploying the PP to end users, I have never looked into it that closely.
localpott wrote:
..Almost every one says to use java web start than using an applet. Humour me. Why do your users want a browser window wrapped around the applet?
It seems logical to me, that the end user should just be able to click the maximize icon in a free floating app., rather than have the screen acreage of the GUI limited by a conventional applet.
My problem is that, Why doesn't jmf work on applets ??Please fix that sticky '?' key.
Reasons mentioned above. To contrast that with a webstart launch, it is trivially easy to add natives to the run-time class-path of a webstart app.
.. have some one tried using this method, and has it worked ??.. I've not tried it for the reasons mentioned above.
..and why does people in this forum encourage others to use java web start instead of applets ? (My) reasons mentioned above.
..and finally does sun want to turn down the concept of using applets ???Given the effort Sun is pouring into the jnlp2 architecture, which allows webstart services to be used even in embedded applets, I think not.
It should be noted though, that Sun has abandoned JMF a long time ago (though they have never issued an announcement to that effect). :(
As such:
a) It is lacking in the more advanced compression codecs, which it seems would be a killer for network/internet based media transfer.
b) Nobody is updating the (32 bit) natives, so I guess they will work on less and less PCs as time goes on.
Those two things aside, I feel that JMF is a relatively well engineered & comprehensive media solution. The reason so many people have trouble getting up to speed in JMF is largely because 'media handling' is a lot more complex than most people realise. I probably should have asked those people who complained about JMF, if they had ever dealt with the intricacies of media handling in another API for anything beyond 'throw a media file into the system player and play it'. Playing a media file would probably be trivially easy in VB.
And finally:
Sub: Is JMF a failed concept ? *<basic question>*
What is the meaning of life? Is a simple or basic question, it is the answer that is more complicated!

Some basic questions about serialization

Hi,
I have some basic questions on serialization.
1. What are the basic criteria to make an object serializable(except that it must implement serializable ?) I mean that objects of some class inherently cannot be serialized so any object must have some features which makes it serializable/non serializable.
2. I know it makes no sense to serialize a socket because it is fixed only by specifying ip and port at both ends, and is valid only when the network connection remains valid. Still in the context of my previous question, I would like to know why a socket cannot be serialized.

Hi,
I have problems to understand you question but will do a try:
From a logical point of view objects can be only serialized reasonabely when they have a state of it's own which can be reestablished at a later point in time and space without further dependencies.
F.E. a "serialized file" would NOT make much sense cause it depends heavily on the state of the underlying file system.
You can't expected that is can be deserialized at a later point of time (physical file refered may not longer exists) or on another machine, where the serialized object was transported to.
Technical - at zero approach - it's more or less trivial. Simply implement Serializable and all non static, non transient fields of your object will be serialized automatically.
But there is a couple of pitfalls, you should study documentations regarding this feature.
Hope this helps
Martin

Basic question

Hello, i have a basic question. if i have defined 2 fields in a cube or a dso:
Name Quantity
and from the external flat file i get some characters for my quantity field. would my load fail? for standard dso and for write optimized?
NOTE: quantity field is a keyfigure defined as numeric.
and the load coming in has "VIKPATEL" for Quantity field and not numbers.
thanks

Hi Vik,
Yes, the load will fail.
May be you coud first load this data into BW (into PSA) and set both fields as characters fields. Then you can create DSO, do transformation from this PSA to the DSO, and put your logic as to what do you want to do with those Quantity that is not number (e.g. convert to 0, or 'Not assgined', etc).
You can use transfer rule, or a clean up ABAP code in the start routine.
Hope this helps.

Pl/sql vs sql basic question

Hi,
I have a very very basic question, so excuse me for that... I just would like to know the difference ( and the difference in usage) between sql and pl/sql?
thank you
Yann

SQL - the structured query language - is the language available for extracting data from the database. It is a 4GL, and each command stands alone and performs a database action.
PL/SQL is the 3GL primarily intended to control the flow of a series of SQL commands. PL/SQL does not, in any way, interact with the data in the database. It does, however, allow SQL statements to be called, or even created, in a specific order.
SQL is capable of a LOT more than people usually realize. Unfortunate, as people often create PL/SQL programs when single SQL statements will do the job. I encourage reading the O'Reilly 'Mastering Oracle SQL' book ... only after fiunishing that book do I recommend any of Feuerstein's excellent PL/SQL books.

Basic questions on data modeling

Hi experts,
I have some basic questions regarding data modeling within MDM. I understand the available table types and the concept of lookup fields. I know that the MDM data modeling concept is different to the relational concept. But having a strong database background my first step was to design a relational data model which I would like to transfer to a MDM repository. Unfortunately I didn't found good information material on this. So here are some questions maybe you can help me:
1) Is it the right approach to model n:m relationships with multivalued lookup fields? E.g. main table Users with lookup field from subtable SapAccounts (a user can have accounts in different SAP systems, that means more than one account).
2) Has a record always be unique in MDM repositories (e.g. should we use Auto ID's in every table or do we have to mark a combination of fields as unique)? Is a composite key of 2 or more fields represented with marking these fields as unique?
3) The concept of relationships in MDM is only based on relationships between single records (not valid for all records in a table)? Is it necessary to define all relationships similar to the relational data model in MDM? Is there something similar to referential integrity in MDM?
4) Is it possible to change the main table to a sub table later on if we realize that it has also to be used as a lookup table for another table (when extending the data model) or do we have to create a new repository from scratch?
Thank you for your answers.
Regards, bd

Yes you are correct. It is almost difficult to map relational database to mdm one. But again MDM is not 'just' a database. It holds much more 'master' information as compared to any relational db.
1) Is it the right approach to model n:m relationships with multivalued lookup fields? E.g. main table Users with lookup field from subtable SapAccounts (a user can have accounts in different SAP systems, that means more than one account).
Yes Here you need to use MV look up tables or can also try Qualifier tables if it gets more complex
2) Has a record always be unique in MDM repositories (e.g. should we use Auto ID's in every table or do we have to mark a combination of fields as unique)? Is a composite key of 2 or more fields represented with marking these fields as unique?
Concept of uniqueness differs here that you also have something called Display Fields (DF). A combination of DF can also be treated as Unique one. For instance while importing records if you select these DF as a combination, you will eliminate any possible of duplicates based on this combination. Auto Id is one of the ways to have a unique id once record is within MDM. While you use UF or DF to eliminate any possible duplicates at import level
3) The concept of relationships in MDM is only based on relationships between single records (not valid for all records in a table)? Is it necessary to define all relationships similar to the relational data model in MDM? Is there something similar to referential integrity in MDM?
Hmm... good one. Referencial Integrity. What I assume you are talking is that if you have relationships between tables then removing a record will not be possible as it is a foreign key for some record. Here MDM does not allow that. As Relationships within MDM are physical and not conceptual. For instance material can have components. Now if material does not exist then any relationship to components is not worthwile to maintain. Hence relationshsip is eliminated. While in relational model relationships are more conceptual. Hence with MDM usage of lookups and main table you do not need to maintain these kind of relationships on your own.
4) Is it possible to change the main table to a sub table later on if we realize that it has also to be used as a lookup table for another table (when extending the data model) or do we have to create a new repository from scratch?
No. It is not possible to convert main table. There is only one main table and it cannot be changed.
I went for the same option but it did not work. What I suggest is to look up your legacy system one by one and see what fields in general can be classified as Master, Reference, Transactional - You will start getting answers immediately.

HT1311 I know this is a basic question, however, how do i change my pass word on itunes to stop my kids from automatically buying tunes from the I store... as my card details are already saved they just log in with their ipods and download via my account

I know this is a basic question, however, how do i change my pass word on itunes to stop my kids from automatically buying tunes from the I store... as my card details are already saved they just log in with their ipods and download via my account

http://support.apple.com/kb/HE36
Regards.

HT1848 Forgive such a basic question, it's easier than looking it up. I have my iTunes music on macbook pro and have only synced it to one iPod. I want to buy a new iPod and want to know will I be able to sync my music from computer to new iPod at no ch

Forgive such a basic question, it's easier than looking it up. I have my iTunes music on macbook pro and have only synced it to one iPod. I want to buy a new iPod and want to know will I be able to sync my music from computer to new iPod at no charge?

will I be able to sync my music from computer to new iPod at no charge?
Yes, you will.

Basic question regarding SSIS 2010 Package where source is Microsoft Excel 97-2005 and there is no Microsoft office or Excel driver installed in Production

Hi all,
I got one basic question regarding SSIS 2010 Package where source is Microsoft Excel 97-2005. I wanted to know How this package works in production where there is no Microsoft office or Excel driver installed. To check that there is excel driver installed
or not, I followed steps: Start-->Administrative Tools--> Data Sources(ODBC)-->Drivers and I found only 2 drivers one is SQL Server and another one is SQL Server Native Client 11.0.
Windows edition is Windows Server 2008 R2 Enterprise, Service Pack-1 and System type is 64-bit Operating System.
We are running this package from SQL Server Agent and using 32-bit (\\Machine_Name\d$\Program Files (x86)\Microsoft SQL Server\110\DTS\Binn\DTExec.exe /FILE "\\Machine_Name\d$\ Folder_Name\EtL.dtsx" /CONFIGFILE "\\Machine_Name\d$\Folder_Name\Config.dtsConfig"
/MAXCONCURRENT " -1 " /CHECKPOINTING OFF /REPORTING E) to run this package. I opened the package and tried to find out what connection we have used and found that we have used "Excel Connection Manager" and ConnectionString=Provider=Microsoft.Jet.OLEDB.4.0;Data
Source=F:\Fares.xls;Extended Properties="EXCEL 8.0;HDR=YES"; and source is ‘Excel Source’
I discussed with my DBA and He said that SSIS is having inbuilt Excel driver but I am not convinced.
Could anyone please clear my confusion/doubt?
I have gone through various links but my doubt is still not clear.
Quick Reference:
SSIS in 32- and 64-bits
http://toddmcdermid.blogspot.com.au/2009/10/quick-reference-ssis-in-32-and-64-bits.html
Why do I get "product level is insufficient..." error when I run my SSIS package?
http://blogs.msdn.com/b/michen/archive/2006/11/11/ssis-product-level-is-insufficient.aspx
How to run SSIS Packages using 32-bit drivers on 64-bit machine
http://help.pragmaticworks.com/dtsxchange/scr/FAQ%20-%20How%20to%20run%20SSIS%20Packages%20using%2032bit%20drivers%20on%2064bit%20machine.htm
Troubleshooting OLE DB Provider Microsoft.ACE.OLEDB.12.0 is not registered Error when importing data from an Excel 2007 file to SQL Server 2008
http://www.mytechmantra.com/LearnSQLServer/Troubleshoot_OLE_DB_Provider_Error_P1.html
How Can I Get a List of the ODBC Drivers that are Installed on a Computer?
http://blogs.technet.com/b/heyscriptingguy/archive/2005/07/07/how-can-i-get-a-list-of-the-odbc-drivers-that-are-installed-on-a-computer.aspx
Thanks Shiven:) If Answer is Helpful, Please Vote

Hi S Kumar Dubey,
In SSIS, the Excel Source and Excel Destination natively use the Microsoft Jet 4.0 OLE DB Provider which is installed by SQL Server. The Microsoft Jet 4.0 OLE DB Provider deals with .xls files created by Excel 97-2003. To deal with .xlsx files created by
Excel 2007, we need the Microsoft ACE OLEDB Provider. SQL Server doesn’t install the Microsoft ACE OLEDB Provider, to get it we can install the
2007 Office System Driver: Data Connectivity Components or
Microsoft Access Database Engine 2010 Redistributable or Microsoft Office suit.
The drivers listed in the ODBC Data Source Administrator are ODBC drivers not OLEDB drivers, therefore, the Excel Source/Destination in SSIS won’t use the ODBC driver for Excel listed in it by default. On a 64-bit Windows platform, there are two versions
of ODBC Data Source Administrator. The 64-bit ODBC Data Source Administrator is C:\Windows\System32\odbcad32.exe, while the 32-bit one is C:\Windows\SysWOW64\odbcad32.exe. The original 32-bit and 64-bit ODBC drivers are installed by the Windows operating system.
By default, there are multiple 32-bit ODBC drivers and fewer 64-bit ODBC drivers installed on a 64-bit platform. To get more ODBC drivers, we can install the 2007 Office System Driver: Data Connectivity Components or Microsoft Access Database Engine 2010 Redistributable.
Besides, please note that 2007 Office System Driver: Data Connectivity Components only install 32-bit ODBC and OLEDB drivers because it only has 32-bit version, but the Microsoft Access Database Engine 2010 Redistributable has both 32- bit version and 64-bit
version.
If you have any questions, please feel free to ask.
Regards,
Mike Yin
TechNet Community Support

If I upgrade to Mountain Lion on the computer that will install it, will my WIFI still work on the computer that cannot be upgraded? I know this is a very basic question

If I upgrade to Mountain Lion on the computer that will install it, will my WIFI still work on the computer that cannot be upgraded? I know this is a very basic question. Trying to hold out as long as I can, but purchasing an iPhone for Christmas and new iMac next year when warrently expires.

Thank U very much for the quick reply, I wanted to upgrade this weekend, but still on the fence. I can live with the software that is not compatible, they are on another compuetr, just didn't want the obvious stuff to stop working.

Basic questions about Infocube

Hi, everyone.
I got very basic questions about infocube data handling.
With infopackage, I extracted all the data about employees from R/3.
But there were some mistakes during inputting employee data, like positions,
so I just extracted those employees data once more.
Now I have two requests in infocube, where the first one has some wrong data.
Is there any solutions about this?
I might got it all wrong, so as beginner, any suggestions and explanations will
be grateful.

Hi,
You can manually delete the earlier request by going in the Manage option of the cube. select the request and click on delete icon at the bottom.
Other option is to make setting in the Infopackage to delete similar or overlapping request.
Data target tab --> 6th column Automatic loading / deletion of similar request. --> click on the blank icon --> you will get a pop-up --> select the radio button - "delete existing request" --> Select Conditions --> Infosource are same, datasource are same and source system are same, --> selections are "Same or More Comprehensive "
Assign points if useful
Regards
Venkata Devaraj !!!

A basic question of class

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