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• tetris rotation

  - by Samuel

  Hey, For university we're supposed to write a game (the language is modula2 little chance you know it). Each tetromino is defined through a central piece and 3 relative pieces, Now when it comes to rotation i just rotate the relative blocks (linear algebra). What i am asking myself is how to handle the rotations a user does when the piece has already "landed" because than the user has a little time left to move his pieve quickly into the desired position but in tetris versions all over the web you can "rotate over" other pieces, but i dont seem to get it with my rotation. Over what piece do i need to rotate? are there guidelines? Thanks

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• Test assembly code on a mac

  - by happyCoding25

  Hello, A while back I was following some tutorials an assembly. I was running it all on a windows machine, compiling with NASM and then writing the compiled code to a floppy disk, then reboot and try the code. This process was long and time consuming and sadly was not on a mac. When I found out that Xcode for mac installed NASM I immediately tried to compile some code. The code compiled fine. The issue is testing it. On a mac I have no floppy (not like I want to use one) so Im not sure how to test this. I looked in to Q (kju) and found it would only emulate things on an ISO file. So I guess what Im asking is is it possible to install the compiled code on an ISO file for testing? (Note: the code when compiled forms a .bin file) Thanks for any help

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• Java - Difference between SwingWorker and SwingUtilities.invokeLater()

  - by Yatendra Goel

  SwingWorker is used for the following purposes: For running long-running tasks in a different thread so as to prevent the GUI from being unresponsive For updating GUI with the results produced by the long-running task at the end of the task through done() method. For updating GUI from time to time with the intermediate results produced and published by the task with the help of publish() and process() methods. SwingUtilities.invokeLater() can perform the above tasks as follows: Instead of executing SwingWorker.execute() method from the EDT, we can execute ExecutorService.submit(new MyRunnable()) as it will also create another thread which can execute long-running task. For updating GUI at the end of the task, we can put code (written in done() method of case1) SwingUtilites.invokeLater(new RunnableToExecuteDoneMethodCode()) at the end of the task. For updating GUI in the middle of the task, we can put code (written in process() method of case1) SwingUtilites.invokeLater(new RunnableToExecuteProcessMethodCode()) at the place where we called publish() method in case1. I am asking this question because the problem specified in question http://stackoverflow.com/questions/2797483/java-swingworker-can-we-call-one-swingworker-from-other-swingworker-instead-o/2824306#2824306 can be solved by SwingUtilities.invokeLater() but can't be solved with SwingWorker

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• Certificate Information from WCF Service using Transport security mode

  - by Langdon

  Is there any way to pull information about which client certificate was used inside of my web service method when using <security mode="Transport>? I sifted through OperationContext.Current but couldn't find anything obvious. My server configuration is as follows: <basicHttpBinding> <binding name="SecuredBasicBindingCert"> <security mode="Transport"> <message clientCredentialType="Certificate" /> </security> </binding> </basicHttpBinding> I'm working with a third party pub/sub system who is unfortunately using DataPower for authentication. It seems like if I'm using WCF with this configuration, then I'm unable to glean any information about the caller (since no credentials are actually sent). I somehow need to be able to figure out whose making calls to my service without changing my configuration or asking them to change their payload.

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• Ellipse Drawing WPF Animation

  - by widmayer

  I am developing a control that is a rectangle area and will draw an ellipse in the rectangle area when a trigger occurs. This control will be able to host other controls like, textbox's, buttons, etc. so the circle will be drawn around them when triggered. I want the circle being drawn as an animation like you were circling the inner controls with a pen. My question is whats the best way to accomplish this. I've been doing some research and I could use WPF animation or I could use GDI+ to accomplish the tasks. I am new to WPF animation so that is why I am asking the question.

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• How to avoid clobbering files when creating a tar archive

  - by Andrew Grimm

  This question notes that it is possible to overwrite files when creating a tar archive, and I'm trying to see how to avoid that situation. Normally, I'd use file roller, but the version installed is playing up a bit (using 1.1 Gb of memory), and I'm not the system administrator. I looked at --confirmation and --interactive, but that only asks me if I want to add file x to the archive, not whether I want to overwrite an existing file. For example, tar --interactive -czvf innocent_text_file.txt foo* Will ask me about each file, but is perfectly happy to overwrite innocent_text_file.txt Is there any switch that acts like -i for cp? Note I am asking about creating an archive, not extracting an archive. Clarification What I'm worried about is accidentally doing something like this tar -czvf * #Don't do this! which would overwrite the first file listed in the glob. To avoid it, I want tar to complain if the first file mentioned already exists, like cp -i * #Don't do this! would check if it would cause you to overwrite an existing file.

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• Make a c# / wpf event fire only once?

  - by Donnie

  I have a case where I want a given event to execute once, and only once. I'm trying to do it this way, but I'm having prolems (else I wouldn't be asking). Note that the following code is inside the function that decides that the event needs to be fired. EventHandler h = delegate(Object sender, EventArgs e) { FiringControl.TheEvent -= h; // <-- Error, use of unassigned local variable "h" // Do stuff } FiringControl.TheEvent += h; In general this should work because of the way scope is preserved for delegates until after they're done running, but, since h is in the process of being built when I try to use it it is still considered to be "uninitialized", apparently.

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• PHP and writing clean code

  - by Pirkka

  Hello Im trying to find best practices to write PHP. I just wonder is this a bad habit. For example, processing variables. $var = 1 $var = doSomething($var); $var = doSomething2($var); $var = doSomething3($var); It looks a bit awful. Here is a example of a real code that I just did: $this->rSum = explode(",", $this->options["rSum"]); $this->rSum = array_combine(array_values($this->rSum), array_fill(0, count($this->rSum), 0)); If someone could pass me some good tutorials of writing cleaner code generally it would be nice! Its me again asking stupid questions. :)

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• Different result with reverse proxy apache and lighttpd.

  - by Danny

  I have an Apache server running in reverse proxy mode in front of a Tomcat java server. It handle HTTP and HTTPS and send those request back and forth to the Tomcat server on an internal HTTP port. I'm trying to replace the reverse proxy with Lighttpd. Here's the problem: while asking for the same HTTPS url, while using Apache as the reverse proxy, the Tomcat server redirect (302) to an HTTPS page but with Lighttpd it redirect to the same page in HTTP (not HTTPS). What does Lighttpd could do different in order to have a different result from the backend server? In theory, using Apache or Lighttpd server as a reverse proxy should not change anything... but it does. Any idea? I'll try to find something by sniffing the traffic on the backend tomcat server.

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• Is it proper to get and especially set Perl module's global variables directly?

  - by DVK

  I was wondering what the best practice in Perl is regarding getting - or, more importantly, setting - a global variable of some module by directly accessing $Module::varName in case the module didn't provide getter/setter method for it. The reason it smells bad to me is the fact that it sort of circumvents encapsulation. Just because I can do it in Perl, I'm not entirely certain I should (assuming there actually is an alternative such as adding a getter/setter to the module). I'm asking this because I'm about to request an addition of a getter/setter for a global variable in one of the core Perl modules, and I would like to avoid it soundly and unanimously rejected on the grounds of "Why the heck do you need one when you can access the variable in the package directly?" - in case doing the latter is actually considered perfectly OK by the community.

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• Safari box shadow inset support

  - by codedude

  I have a box in one of my websites that has a these property: -moz-box-shadow:inset 0 0 50px #ecf4de; -webkit-box-shadow:inset 0 0 50px #ecf4de; box-shadow:inset 0 0 50px #ecf4de; This gives the box a nice gradient towards the center. However, Safari does not support the "inset" property and IE doesn't support box-shadow at all. I can't use an image for this because the height of this box changes for each situation. I don't want to use 3 images, (one for the top, a repeating one for the middle and one for the bottom), as this can get very messy code. So what I'm asking is if there is any way to produce the box shadow in all browsers.

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• good books on numerical computation with C

  - by yCalleecharan

  Hi, I've read the post "What is the best book on numerical methods?" and I wish to ask more or less the same question but in relation to C programming. Most of the time, C programming books on numerical methods are just another version of the author's previous Fortran book on the same subject. I've seen Applied numerical methods in C by Nakamura, Shoichiro and the C codes are not good programming practice. I've heard bad comments about Numerical Recipes by Press. Do you know good books on C that discusses numerical methods. It's seem better for me to ask about good books on C discussing numerical methods than rather asking books on numerical methods that discusses C. I've heard about Numerical Algorithms with C by Giesela Engeln-Müllges and A Numerical Library in C for Scientists and Engineers bu Lau but haven't read them. Good books will always have algorithms implemented in the programming language in a smart way. Thanks a lot...

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• Is there any good programming books forum out there?

  - by prosseek

  I always feel the internet forums are a good way to gain knowledge - asking questions and get some answers from everybody, and SO is a great example. But when I get questions reading some programming books, I wonder to whom can I ask the questions. O'Reilly and PragProg have their own book forums, and some authors open their own forums. Or, we might be able to send an email to the author if that is absolutely necessary. Is there any good forum on programming books? Can you share any good programming book forums on the web? Or, is SO the best place to ask some questions in programming books? I found some book reading forums, but not programming books.

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• Syncing google calendar with custom calendar

  - by yogsma

  I am using google calendar API to sync google calendar with our custom calendar. Right now I am trying it with a crude way by asking user if he/she wants to sync their calendar with google or not. If they say "yes" , I show them login screen where they have to enter their google user id and password and the calendar will be synced. But now when I change the month , the screen gets refreshed and all login information is lost and that changed month doesn't show up the events from google calendar. What is a best way for authentication AuthSub, OAuth or the crude way I mentioned for testing locally? I really don't know if I can use OAuth locally.

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• What non-programming books should programmers read?

  - by Charles Roper

  This is a poll asking the Stackoverflow community what non-programming books they would recommend to fellow programmers. Please read the following before posting: Please post only ONE BOOK PER ANSWER. Please search for your recommendation on this page before posting (there are over NINE PAGES so it is advisable to check them all). Many books have already been suggested and we want to avoid duplicates. If you find your recommendation is already present, vote it up or add some commentary. Please elaborate on why you think a given book is worth reading from a programmer's perspective. This poll is now community editable, so you can edit this question or any of the answers. Note: this article is similar and contains other useful suggestions.

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• What learning habits can you suggest?

  - by Asaf R

  Hi, Our profession often requires deep learning; sitting down and reading, and understanding. I'm currently undergoing an exam period, and I'm looking for ways to learn more effectively. I'm not asking about what to learn, or whether to prefer blogs over books, etc. My question is much more physical than that - What do you do when need to study, and I mean study hard? I'm looking for answers such as I slice my time to 2.5 hours intervals and make a break between them, but never during. I keep a jar of water nearby. I wake up at 6 o'clock sharp and start my day with a session at the gym. What good learning habits did acquire, or wish you had acquired? (I know this isn't strictly programming related, but it is programmers related)

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• JUnit Best Practice: Different Fixtures for each @Test

  - by Juri Glass

  Hi I understand that there are @Before and @BeforeClass, which are used to define fixtures for the @Test's. But what should I use if I need different fixtures for each @Test? Should I define the fixture in the @Test? Should I create a test class for each @Test? I am asking for the best practices here, since both solutions aren't clean in my opinion. With the first solution, I would test the initialization code. And with the second solution I would break the "one test class for each class" pattern.

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• Apache on linux and i18n : spawning processes or threads ?

  - by Jerome WAGNER

  Hello, I would like to understand better exactly what is going on when Apache on linux receive an HTTP request in a process pre-fork model. Let's say we have 20 Apache child processes waiting. When I receive an HTTP request, is it true to say that 1 child process will be chosen to handle the request and that this process won't handle another request from another user until the first one is finished ? I am asking the question because of a PHP limitation that states : The locale information is maintained per process, not per thread. If you are running PHP on a multithreaded server API like IIS or Apache on Windows, you may experience sudden changes in locale settings while a script is running, though the script itself never called setlocale(). This happens due to other scripts running in different threads of the same process at the same time, changing the process-wide locale using setlocale(). Thanks Jerome Wagner

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• Languages and development methodologies

  - by Carlos

  Having never worked with Ruby on Rails, I looked it up on Wikipedia. It says It is intended to be used with an Agile development methodology that is used by web developers for rapid development. This got me asking how a given language/framework can be more appropriate for given development methodologies. Are there certain languages that are more friendly for pair programming, for instance? Are there language features that make certain methodologies are more appropriate? Are there features that make certain methodologies impossible? My initial reaction is to dismiss the connection (the design process is a business process, which is more dependent on business needs that language features). But I'm an only programmer within the firm, and I'm a partner, so I get to decide the business needs. What do you think? Also, if the SO community finds that certain languages point towards certain methodologies, what methodology is most common for c#, which is what I use most of the time?

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• Interview questions for junior C and C++ developer position

  - by Ondrej Slinták

  What interview questions should people expect as a junior C and C++ developer? Code questions or more of theory? Solutions in pseudo-code or in C code? Maybe I'm misinterpreting the word "junior", but I have no idea what would anyone ask me if I have no C work experiences. I'm bit afraid of tricky questions with pointers, so I'd like to be sure what should I look up before actually going there. I'm a junior PHP developer with 1 year of experiences, if it helps the question. Hope it isn't duplicate as I'm asking particularly about junior developer job.

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• c# ASP HttpResponse with redirect causes HTTP 302

  - by acnse

  Hi, I have a flow of web pages A and B. On the web page A, I do a "Response.Redirect("B.aspx"); The page B needs a client certificate. When the redirect is done I see a popup asking for a client certificate. I select the correct certificate, which is retrieved from a smart card, and then I insert the pin. Right after, I see a page saying that the connection was lost, and I receive an HTTP 302. I never reach the page B.aspx. I tried to add the following line "Response.RedirectLocation = "B.aspx"; but with no success too. Any hints? Thanks

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• QT creator/qt embedded widget demo problem

  - by jhowland

  I have downloaded the source code for the embedded widget demos from nokia and tried to get it to compile--I end up with the following error: Compiler (mingw32) message : In file included from ../../src/basicgraph/qtbasicgraph.cpp:9: ../../src/basicgraph/qtbasicgraph.h:14:17: QtGui: No such file or directory The offending line is #include <QtGui> QT creator 1.2.0, QT 2009.03 I have checked paths, etc, and all seems fine. I have checked to make sure that I have implicitly included QT += gui and that I have NOT included QT -= gui anywhere in the .pro and .pri files. After making no changes, I used VS2005 and the appropriate commercial version of QT 4.4.3, and it compiled and ran fine I have googled the error, and have found others asking similar questions (but not here) but no posted answers...so I would appreciate any help. thanks Jonathan Howland

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• Is there an easy to script 2d game world?

  - by Sandro

  For a school project we're developing a game that's a little like Conway's game of life, with different organisms taking up slots in the world and then eating each other. I would like to see this take place in a 2d world. Like being able to take starcraft and have zergling and marines play roles. The problem with starcraft is that the whole algorithm would have to be written inside of the game editor, and starcraft isn't free or open source. So is there another engine that is starcraft/warcraft/AOE-ish that can be scripted from outside of the game and is freely available? (I'm asking a lot here I know)

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• How can I find which process has opened a specific file?

  - by Hosam Aly

  How can I find which processes have a specific file opened, and their open, access and share modes? Additionally, is it possible to change these values for a process? Or is it even possible to open a file for reading if it is already opened for exclusive access by another process? Please note that I don't want to invalidate the handle of the process having the file opened. I just want to be able to access the file (if possible). (I'm mainly asking about Windows, but solutions for other platforms are welcome, since they contribute to the community's knowledge.) Edit: I found some answers for my first question here and there. Edit 2: Thanks everybody for the tools you mentioned, but I am mainly looking for programmatical techniques (e.g. using Win32 APIs).

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• When making a branch in TortoiseSVN, what do "head", "working copy", and "specific" revisions mean?

  - by Asad Butt

  A new user of Tortoise SVN, working over source control. I have a Visual Studio solution which consists of 5 webAppliation projects. I need to take one out and work over it in a branch. When I try to branch it, It is asking me of one of these options head revision in repository specific revision in repository working copy revision Problem 1: What exactly are these ? I am confused with "head revision" and "working copy", as they appear same to me. EDIT: Problem 2: Why cant we branch from Repository GUI itself, (would be head revision) ? Problem 3: Can you list the steps, needed to branch from a directory !

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