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• Run another version of Python using virtualenv

  - by mazlor

  I apologize in advance if the question is dummy ,i use Python 3.2.3 on Windows xp ,now i need Python3.3.2 , but i can't remove Python 3.2.3 because i have many codes and packages need to be run by it. I installed virtualenv to run two versions of Python in two different environments , but after that i didn't know what to do to run a code using Python 3.3.2 , here what i did: C:\>virtualenv.exe env1 C:\>env1\Scripts\activate now i don't know what to do after a folder was created its name env1 , i downloaded Python 3.3.2 and installed it in the same folder (env1) , is that correct ? then i try the following: (env1) C:\>python3.3.2 I got the following : 'python3.3.2' is not recognized as an internal or external command, operable program or batch file. also i tried : (env1) C:\>python python33 I got the following: python: can't open file 'python33': [Errno 2] No such file or directory As i mentioned , i stuck at this point , any help will be very appreciated. Thanks

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• Zend RegEx Validator error message issue

  - by Mallika Iyer

  Hello, I'm validating a text field in my form as follows: $name = new Zend_Form_Element_Text('name'); $name->setLabel('First Name:') ->setRequired(true) ->addFilter(new Zend_Filter_StringTrim()) ->addValidator('regex',true,array('/^[(a-zA-Z0-9)]+$/')) ->addErrorMessage('Please enter a valid first name'); What I'm trying to accomplish is - how can i display a meaningful error message? Eg: If first name is 'XYZ-', how can i display '- is not allowed in first name.' Is there a way I can access what character the regex is failing for? Would you recommend something else altogether? I thought about writing a custom validator but the regex is pretty simple, so I don't see the point. I couldn't find a decent documentation for the zend 'regex' validator anywhere. If I don't override the default error message, I simple get something like : ';;;hhbhbhb' does not match against pattern '/^[(a-zA-Z0-9)]+$/' - which I obviously don't want to display to the user. I'd appreciate your inputs.

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• Time to ignore IDisposable?

  - by Mystagogue

  Certainly we should call Dipose() on IDisposable objects as soon as we don't need them (which is often merely the scope of a "using" statement). If we don't take that precaution then bad things, from subtle to show-stopping, might happen. But what about "the last moment" before process termination? If your IDisposables have not been explicitly disposed by that point in time, isn't it true that it no longer matters? I ask because unmanaged resources, beneath the CLR, are represented by kernel objects - and the win32 process termination will free all unmanaged resources / kernel objects anyway. Said differently, no resources will remain "leaked" after the process terminates (regardless if Dispose() was called on lingering IDisposables). Can anyone think of a case where process termination would still leave a leaked resource, simply because Dispose() was not explicitly called on one or more IDisposables? Please do not misunderstand this question: I am not trying to justify ignoring IDisposables. The question is just technical-theoretical.

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• Out of memory error in java

  - by Anuj

  I am getting OutOfMemoryError: java heap snippets of the method: { // step 1: I am creating a 2 dim array int totalCombination = (int) Math.pow(2.0, (double) vowelCount); here vowelCount > 10 // step2: initializing my array // step3: and using that array } My Question: each time this method is called, that array is getting created. Is it possible that the array is not getting released . In windows taskmanager i can see memory used by java is purely incremental. So it is not that at a point heap size is less, but memory is repetitively used and not released somehow. Please let me know if you need more detal. Please help to debug the error. Anuj

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• Rewriting a Subdomain with mod-rewrite

  - by resonantmedia

  I have a project that uses the moodle library. I had to change the URL from moodle.example.com to learn.example.com, due to a client request. I thought this would be an easy change, but alas moodle inserts all links and images in with the complete url instead of the relative url. Is it possible using mod-rewrite to point all requests to moodle.example.com to learn.example.com and maintain the query string? Example: I want a request to: http://moodle.example.com/course/view.php?id=2&topic=1 to go to http://learn.example.com/course/view.php?id=2&topic=1. Is this possible? Thanks, Josh

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• How do I include 2 tables in LocalStorage?

  - by Noor

  I've got a table that you can edit, and I've got a simple code saving that list when you're done with editing it. (the tables have the contenteditable on) The problem I've stumbled upon is that if I double click on enter, the table gets divided into two separate tables with the same ID. This causes the code I'm using to set the localStorage to only store one of the tables (I assume the first).. I've thought of different solutions and I wonder if someone could point out the pro's and con's (if the solutions even works that is). Make a loop that checks the page after tables and stores them into an array of localStorage-items.. I'd have to dynamically create a localStorage item for each table. Take the whole div that the tables are in, and store that in the localStorage, when a user revisits the page, the page checks after the items in storage and displays the whole divs. Any suggestions you have that can beat this :).. (but no cache, it has to be with the localStorage!) Thanks

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• How do i start Game programming in windows phone xna?

  - by Ankit Rathod

  Hello, I am very much interested in Game programming in Xna. However during my college days i did not take Physics or Maths. Does that mean i can't create games in xna? I just know basics of trignometry. Can you all point me to few links where i can learn xna as well as the basic stuff of Maths that is bound to be required in most of the games? Are all game programmers excellent in Maths and Physics ? Thanks in advance :)

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• Rotate a feature programatically Open Layers

  - by Ozaki

  TLDR I want to rotate a Feature in my open layers. I want it to face a certain heading that I am receiving from server. I know that you can make a feature spin on a point or so on: window.setInterval(function() {rotateFeature( pointFeature, 360 / 20, origin)}, 100); as from the open layers example. But I want to be able to face it towards a heading I am given, so. Can I face a feature towards a heading? Can I face a feature(image) in the same way? If not is it possible to automatically calculate the rotation required and position it that way? Or any ideas on how I could do this with the image? (hoping not to have 360 images) Thanks in advance.

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• iPad Orientation Paradigm

  - by JustinXXVII

  I'm not a super awesome designer so this new paradigm has me a little cranky. The iPad is not supposed to have a standard orientation, and should/shall display screen contents at whichever orientation the user decides. This has me sort of stumped. I can keep my UI designed the way I want it in landscape mode, but switching to portrait, I just can't determine the best way to present app content. I know it's all speculation at this point, but what are the chances we can override the autoRotateToOrientation to only include the orientation of our choice? Apple ignored the HIG on a lot of issues for iPhone, including splash screens, saving state, etc. I know we can't really argue with Apple, but doesn't it sound slightly ridiculous to reject an app because it won't rotate to portrait? I've come a long way porting some code to iPad and it works great in landscape mode. I guess only time will tell. What do you all think?

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• Algorithm for parsing a flat tree into a non-flat tree

  - by Chad Johnson

  I have the following flat tree: id name parent_id is_directory =========================================================== 50 app 0 1 31 controllers 50 1 11 application_controller.rb 31 0 46 models 50 1 12 test_controller.rb 31 0 31 test.rb 46 0 and I am trying to figure out an algorithm for getting this into the following tree structuree: [{ id: 50, name: app, is_directory: true children: [{ id: 31, name: controllers, is_directory: true, children: [{ id: 11, name: application_controller.rb is_directory: false },{ id: 12, name: test_controller.rb, is_directory: false }], },{ id: 46, name: models, is_directory: true, children: [{ id: 31, name: test.rb, is_directory: false }] }] }] Can someone point me in the right direction? I'm looking for steps (eg. build an associative array; loop through the array looking for x; etc.).

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• How do I set an Array in one class with another array in another class in Objective-C

  - by Stef

  Hi Guys, I've populated and array with data like this in one class... PowerClass .h NSMutableArray pickerArray; @property (nonatomic, retain) NSMutableArray pickerArray; - PowerClass .m @synthesize pickerArray; @implementation NSMutableArray *array = [[NSArray alloc] initWithObjects:@"stef", @"steve", @"baddamans", @"jonny", nil]; pickerArray = [NSMutableArray arrayWithArray:array]; And I'm trying to set the Array in another class WeekClass .h PowerClass *powerClass; NSMutableArray *pickerData; @property (nonatomic, retain) NSMutableArray pickerData; @property (nonatomic, retain) PowerClass *powerClass; WeekClass .m @implementation pickerData = [NSMutableArray arrayWithArray:powerClass.pickerArray]; I have no errors or warnings. It just crashes. The NSLog says that the powerClass.PickerArray is Null... I don't know why this is... Please help point me in the right direction... Thanx guys Stef :-)

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• Objective-C @class / import best practice

  - by Winder

  I've noticed that a lot of Objective-C examples will forward declare classes with @class, then actually import the class in the .m file with an import. I understand that this is considered a best practice, as explained in answers to question: http://stackoverflow.com/questions/322597/objective-c-class-vs-import Coming from C++ this feels backwards. I would normally include all needed .h files in the new classes header file. This seems useful since it would make the compiler generate a warning when two classes include each other, at which point I can decide whether this is a bad thing or not then use the same Objective-C style and forward declare the class in the header and include it in the .cpp file. What is the benefit of forward declaring @class and importing in the implementation file? Should it be a best practice in C++ to forward declare classes rather than including the header file? Or is it wrong to think of Objective-C and C++ in these similar terms to begin with?

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• Retrieving FBO data in GLSL

  - by Tom Savage

  I'm trying to get MRT working in OpenGL to try out deferred rendering. Here's the situation as I understand it. Create 3 render buffers (for example). Two RGBA8 and one Depth32. Create an FBO. Attach render buffers to FBO. ColorAttachment0/1 for color buffers, DepthAttachment for depth buffer. Bind the FBO. Draw geometry. Send data to different attachments using gl_FragData[] in the frag shader. At this point I would want to take the data in another pass using GLSL, how can a) retrieve data from the framebuffer color attachments, b) get data from the depth component.

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• Does "Debug" invalidate ASP.Net MVC OutputCache?

  - by William Edmondson

  I have images stored in a database and am serving them from an MVC controller as "FileResult". If I run the MVC application from Visual Studio 2008 in debug mode and set a break point inside the controller method the debugger intercepts the call on every page refresh regardless of my "OutputCache" settings. Does the VS debugger invalidate the OutputCache or is there something else going on here? [OutputCache(Duration = 86400, VaryByParam = "id")] public FileResult Index(string id) { byte[] image; int imageId; int.TryParse(id, out imageId); using (var ctx = new EPEntities()) { var imageObj = (from images in ctx.Images where images.ID == imageId select images).FirstOrDefault(); image = imageObj.Image; } return new FileContentResult(image, "image/gif"); }

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• Setup requires .NET 4.0 - System already has .net 4.0

  - by Willem

  Hi all, I created a service which I now want to install to test, I created a setup program from the templates in VS2010. When running the setup program it prompts me to download and install .net fw 4.0, but I already have it installed. I did try to just install the file that I get pointed to (4.0 cliet), but not only does it still not work, it causes vs2010 to throw an unknown error and can't open. I've now uninstalled everything (including vs2010 beta) and started afresh with VS2010 ultimate trial full version, framework 4.0 and win 7 but it still prompts me to install fw 4.0 when I try to run the setup. Can anyone please point me in the right direction? Thanx in advance Willem

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• How do you redirect https to http

  - by mauriciopastrana

  that is, the opposite of what (seemingly) everyone teaches. I have a server on https for which I paid an SSL cert for and a mirror for which I haven't and keep around for just for emergencies so it doesn't merit getting a cert for. On my client's desktops I have SOME shortcuts which point to http://production_server and https://productionserver (both work), however; I know that if my prod. server goes down, then DNS forwarding kicks in and those clients which have https on their shortcut will be staring at https://mirrorserver (Which doesnt work) and a big fat IE7 red screen of uneasyness for my company. Unfortunately, I can't just switch this around at the client level. These users are very computer illiterate: and are very likely to freak out from seeing https "insecurity" errors (specially the way FFX3 and IE7 handle it nowadays: FULL STOP, kinda thankfully, but not helping me here LOL). It's very easy to find apache solutions for http-https redirection, but for the life of me I can't do the opposite. Ideas? Cheers, /mp

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• Don't see Clean solution option in Visual Studio

  - by user102533

  For one of the solutions, I don't see the Clean Solution option neither in the context menu when I right click on the solution name in the Solution Explorer nor in the Build menu. When I make any changes to the project and debug, VS never hits the break point and I get the "The breakpoint will not currently be hit. The source code is different from the original version." message. My understanding is that I need to clean the solution. For other solutions, I do see the Clean solution and I don't have the same issue.

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• different location of AndroidManifest.xml

  - by didito

  i have a custom buildchain for an android project. there is a build.xml and build.properties. build.properties contains this line: manifest.file =${env.WORK_FOLDER}/AndroidManifest.xml and WORK_FOLDER is correctly set to proj_root_work. the layout is like the following: proj_root-_work [DIR] (some stuff gets preprocessed and all finally copied here - src, res, assets and the AndroidManifest.xml) -build.xml -build.properties then i call ant for my build configuration from the proj_root and it complains about not finding AndroidManifest.xml. when i put it in my proj_root it works, but i really want it in my _Work directory. i read that the file HAS TO BE in the root, what is the point then of the build.properties entry? also i saw some custom parameters to aapt.exe ... any hints welcome, thx

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• Try-Catch-Throw in the same Java class

  - by Carlos

  Is it possible to catch a method in the current class the try-catch block is running on? for example: public static void arrayOutOfBoundsException(){ System.out.println("Array out of bounds"); } ..... public static void doingSomething(){ try { if(something[i] >= something_else); } catch (arrayOutOfBoundsException e) { System.out.println("Method Halted!, continuing doing the next thing"); } } If this is possible how will it be the correct way to call the catch method? If this is not possible, could anyone point me in the right direction, of how to stop an exception from halting my program execution in Java without having to create any new classes in the package, or fixing the code that produces ArrayOutOfBoundsException error. Thanks in Advance, A Java Rookie

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• Header file-name as argument

  - by Alphaneo

  Objective: I have a list of header files (about 50 of them), And each header-file has few arrays with constant elements. I need to write a program to count the elements of the array. And create some other form of output (which will be used by the hardware group). My solution: I included all the 50 odd files and wrote an application. And then I dumped all the elements of the array into the specified format. My environment: Visual Studio V6, Windows XP My problem: Each time there is a new set of Header files, I am now changing the VC++ project settings to point to the new set of header files, and then rebuild. My question: A bit in-sane though, Is there any way to mention the header from some command line arguments or something? I just want to avoid re-compiling the source every time...

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• DRY programming dilemma

  - by fayer

  the situation is like this: im creating a Logger class that can write to a file but the write_to_file() function is in a helper class as a static function. i could call that function but then the Log class would be dependent to the helper class. isn't dependency bad? but if i can let it use a helper function then what is the point of having helper functions? what should one prioritize here: using helper functions and have to include this helper class everywhere (but the other 99 methods wont be useful) or just copy and paste into the Log class (but then if i have done this 100 times and then make a change i have to change in 100 places). share your thoughts and experience!

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• How can I put my own text hover into default Eclipse editor?

  - by vitivy

  I need to put some extra information into to the standard "javadoc" hover, that shows up when you go with mouse over some token. Or I need to create a new hover showing that information while pressing some key (like alt) and then hovering (I can see that this is done e.g. with the shift key, which enables us to see the hover with sourcecode, instead of javadoc). So far I found documentation on how to create hover in your own editors, but I need to extend the default java editor. Basically I am interested in showing some e-mail information related to the classname (token) over which user is hovering. Is there any extension point that could be used for this? Thanks for any help!

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• App engine datastore - query on Enum fields.

  - by Gopi

  I am using GAE(Java) with JDO for persistence. I have an entity with a Enum field which is marked as @Persistent and gets saved correctly into the datastore (As observed from the Datastore viewer in Development Console). But when I query these entities putting a filter based on the Enum value, it is always returning me all the entities whatever value I specify for the enum field. I know GAE java supports enums being persisted just like basic datatypes. But does it also allow retrieving/querying based on them? Google search could not point me to any such example code. Details: I have printed the Query just before being executed. So in two cases the query looks like - SELECT FROM com.xxx.yyy.User WHERE role == super ORDER BY key desc RANGE 0,50 SELECT FROM com.xxx.yyy.User WHERE role == admin ORDER BY key desc RANGE 0,50 Both above queries return me all the User entities from datastore in spite of datastore viewer showing some Users are of type 'admin' and some are of type 'super'.

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• jQuery / Spry Validation / Problem

  - by samuel baldus

  Hi Chaps, I have a PHP form with one input and a button. A jQuery script ('loading' animated gif) is triggered on the click of the submit button. I also have a Spry Validation field linked to the input. At the moment, if the validation is triggered, the animated gif continues and won't stop. The furthest I've managed to get with it, is to click the validation message to stop the animation, but what I'm really after is to stop the animation when the validation is visible/triggered, but I can't find a suitable Event. $(function() { $("#button_download") .click(function() { }) .throbber(); $("#sprytextfield1") .click(function(sprytextfield1) { $.throbberHide(); }) }); If someone can point me in the right direction, that would be sweet.

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• Can Core Data be used on Linux?

  - by glenc

  This might be a stupid question, but I was wondering whether or not you can use the Core Data libraries on Linux at all? I'm planning how to build the server side of an iPhone app that I'm working on, and have found that you can use PyObjC to get access to Core Data in a Python environment, e.g. use Core Data in a TurboGears web application. At this point I'm thinking that you would have to run the web server on Mac OSX, because I can't find any evidence on the internet that you can access the Objective-C libraries on Linux. I've always written webapps on Linux but will obviously make the jump to an OSX server if it allows me to use the same datastore implementation on the iPhone and the server, the only job remaining being the Core Data <- Web Services XML translation that has to happen on the wire.

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