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• Why is C++ backward compatible with C ? Why isn't there some "pure" C++ language ?

  - by gokoon

  C and C++ are different languages, blababla we know that. But if those language are different, why is it still possible to use function like malloc or free ? I'm sure there are all sort of dusty things C++ has because of C, but since C++ is another language, why not remove those things to make it a little less bloat and more clean and clear ? Is it because it allows programmers to work without the OO model or because some compilers doesn't support high-level abstract features of C++ ?

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• Adding Sharepoint 2007/2010 ontop of TFS 2010

  - by Doug

  So i finally have everything up and running and everyone is mostly happy - TFS 2010 rocks! However i now want to add office sharepoint, i didn't want to have it installed first because i was worried that it would stuff with things and i wanted to look back on the TFS installation, once i knew how portals were created. So what is the best way to now add sharepoint to the installation without stuffing things up? i have a 2 server environment, with TFS on one and the database on another.

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• Why is Serializable Attribute required for an object to be serialized

  - by Keivan

  Based on my understanding SerializableAttribute provides no compile time checks, as its all done at runtime, then why is it required for classes to be marked as serializable? Couldn't sterilizer just try to serialize an object and just fail? isn't it what it does right-now when something is marked, it tries and fails. wouldn't it be better if you had to mark things as unserializable rather than serializable? that way you wouldn't have the problem of libraries not marking things as serializable?

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• Really fast C++ html parser

  - by Alessandro

  Hello to all, I'm doing a html text feature extractor in C++; the program need to be REALLY fast: i need to extract a this features in ms per html page and the memory usage needs to be good and finally unicode encoding well be nice. I know how difficult is to have all of this things, but i want a parser close to these things at least. Somebody have a suggestion?

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• C: performance of assignments, binary operations, et cetera...

  - by Shinka

  I've heard many things about performance in C; casting is slow compared to normal assignments, functional call is slow, binary operation are much faster than normal operations, et cetera... I'm sure some of those things are specific to the architecture, and compiler optimization might make a huge difference, but I would like to see a chart to get a general idea what I should do and what I should avoid to write high-performance programs. Is there such a chart (or a website, a book, anything) ?

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• Am I using too much jQuery? When am I crossing the line?

  - by Andrea

  Lately I found myself using jQuery and JavaScript a lot, often to do the same things that I did before using CSS. For example, I alternate table rows color or create buttons and links hover effects using JavaScript/jQuery. Is this acceptable? Or should I keep using CSS for these kinds of things? So the real question is: When I'm using too much jQuery? How can I understand when I'm crossing the line?

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• Java: JButton actionListener explantation

  - by MrDoctorProfessorTyler

  I am extremely confused as to how a JButton works. I have read over the oracle documents of the JButton, but I have failed to see how a JButton can have an actionlistener added to it. I have really always wondered how things like JFrames and all that can have things like .addMouseListener and all that. Can anyone explain how a JButton can have an actionListener added to it like the .addActionListener(...) syntax?

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• using Hibernate to loading 20K products, modifying the entity and updating to db

  - by Blankman

  I am using hibernate to update 20K products in my database. As of now I am pulling in the 20K products, looping through them and modifying some properties and then updating the database. so: load products foreach products session begintransaction productDao.MakePersistant(p); session commit(); As of now things are pretty slow compared to your standard jdbc, what can I do to speed things up? I am sure I am doing something wrong here.

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• Where are the clever uses of strict evaluation?

  - by devonrt

  It seems like there are plenty of examples of clever things being done in a lazily-evaluated language that can't be done in an environment with strict evaluation. For example infinite lists in Haskell or replacing every element in a tree with the tree's minimum value in one pass. Are there any examples of clever things being done in a strictly-evaluated language that can't easily be done in a lazily-evaluated language?

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• Starting a C++ project. Should I worry about freeing dynamic allocated memory?

  - by Luca Matteis

  I am pretty proficient with C, and freeing memory in C is a must. However, I'm starting a new C++ project, and I've heard some things about how you don't need to free memory using shared pointers and other things. Where should I read about this? Is this a valuable replacement for proper delete C++ functionality? How does it work?

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• How to start with Ruby on Rails on Mac OS X Snow Leopard?

  - by Nyla Pareska

  Is there any good tutorial on how to get things installed and working on Mac OS X Snow Leopard? Also which tools do you use? TextMate? Or something else? I am trying my first steps with RoR after years of ASP.NET development on Windows platform but I am getting curious to learn other things as well to become a better developer.

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• Add TODO: into XAML so that is shows on my task list in visual studio

  - by Obbles

  Hello there, Does anyone know how to add todo: items into XAML? I am in the habit of using //TODO: in my code for things that I have to come back and fix up. I can't seem to find out if this is possible to do in XAML? I would like to add things to my tasklist that point to XAML. :( Any idea's would be appreciated, thank you.

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• extendible hashing

  - by Phenom

  I need to make a program that shows the hash value of a given key, using extendible hashing. In extendible hashing, I know that the buckets split and directories change. So if I make my program, do I have to already know things like if the bucket it hashes to is filled, or do I not have to worry about those things and just compute a hash value based on the key?

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• Drawbacks of using an integer as a bitfield?

  - by Mark

  I have a bunch of boolean options for things like "accepted payment types" which can include things like cash, credit card, cheque, paypal, etc. Rather than having a half dozen booleans in my DB, I can just use an integer and assign each payment method an integer, like so PAYMENT_METHODS = ( (1<<0, 'Cash'), (1<<1, 'Credit Card'), (1<<2, 'Cheque'), (1<<3, 'Other'), ) and then query the specific bit in python to retrieve the flag. I know this means the database can't index by specific flags, but are there any other drawbacks?

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• can i perform xml operations in XMLLITE with the same features of MSXML?

  - by Rajakumar

  Hi , I know something about MSXML parser ,to create an xml with native code ..Msxml depends COM..So I want to create xml without com and dom ,so i wish to choose XMLLITE..but i dont know full details about xmllite ,when i was read the xmllite documentation in msdn ,i gathered some points ,they will provide only 2 things (IXMLReader & IxmlWriter).Here in msxml ,i had many functions to do xml operations ,such as selectsinglenode,appendchild ..Now can i perform the same things with XMLLITE?..please give me the right choice towards this ...

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• How to change the color of progressbar in C# .NET 3.5?

  - by John

  I'd like to do two things on my progress bar. Change the green colour to red. Remove the blocks and make it in one color. Any information about those two things I wonder how to accomplish will be greatfuly appreaciated! Thanks.

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• How to emulate OOP with C?

  - by Francisco Garcia

  I would like to know which articles or books are good to use OOP concepts in C. I mean things like using function pointers to emulate classes, strict naming conventions to emulate namespaces, and things like that. Also a reference about how to code in C different types of UML diagrams would be great.

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• What doesn't MySQL do? [closed]

  - by sean riley

  When using MySQL 5.1 Enterprise after years of using other database products like Sybase, Infomix, DB2; I run into things that MySQL just doesn't do. For example, it can only generate an EXPLAIN query plan for SELECT queries. What are the other things I should watch out for?

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• Rails-like console for PHP?

  - by Chad Johnson

  Every so often, things work in my local PHP development environment, while in my test environment on my server, things do not. It's a nightmare to debug this. If I had a console like Rails provides, debugging would be much much simpler. Is there anything like the Rails console but for PHP? I should mention that I am using a home-brewn PHP application.

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• Can I use a filehandle instead of a filename for creating DBM files?

  - by Dancrumb

  I'm using MLDBM to persist some Perl data structures and I'm wondering if there's an alternative to the following: tie %hash, "MLDBM", $dbm_file, O_CREAT | O_RDWR, 0644; Primarily, I'd like to be able to use STDOUT, rather than a known file name. This could then be redirected to a file on the shell-side. I've been searching with keywords like "tie", "DBM" and "filehandle", but the hits tend to talk about tying filehandles to things, as opposed to things to filehandles. Any suggestions?

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• Efficiently adding or removing elements to a vector or list in R?

  - by Ryan Thompson

  I'm implementing an algorithm that involves lots of adding and removing things from sets. In R, this is slow because as far as I know, adding or removing things from a vector is slow, since the entire vector has to be re-allocated. Is there a way do do it more efficiently?

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• Multi core processors... are they really needed?

  - by user69514

  What things are multi-core processors needed for? I mean what type of things benefit from using multi-core ? Also are there anythings that suffer in performance for using multi-core... ie. they perform better using a single core processor?

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• using Hibernate to loading 20K products, modifying the entity and updating to db

  - by Blankman

  I am using hibernate to update 20K products in my database. As of now I am pulling in the 20K products, looping through them and modifying some properties and then updating the database. so: load products foreach products session begintransaction productDao.MakePersistant(p); session commit(); As of now things are pretty slow compared to your standard jdbc, what can I do to speed things up? I am sure I am doing something wrong here.

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• Would Python make a good substitute for the Windows command-line/batch scripts?

  - by Lawrence Johnston

  I've got some experience with Bash, which I don't mind, but now that I'm doing a lot of Windows development I'm needing to do basic stuff/write basic scripts using the Windows command-line language. For some reason said language really irritates me, so I was considering learning Python and using that instead. Is Python suitable for such things? Moving files around, creating scripts to do things like unzipping a backup and restoring a SQL database, etc.

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• Moving from php to rails

  - by piemesons

  While moving from php to rails (Means procedural language to Object oriented language), what are the various things you should keep in mind. How to think in world of object oriented programming? What are thinks i should kept in mind before starting the things. Any tips?

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