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• Is Django's manage.py syncdb or South used to create the test database?

  - by Thierry Lam

  With Django 1.1.1 and South 0.62, running a test from the CLI usually have the following output: Creating table some_model Installing index for my_app.SomeModel model . ----- Ran 1 test in 1s OK After upgrading to South 0.7, the output is invoking South's migration: Creating table some_model Installing index for my_app.SomeModel model Migrating... Running migrations for my_app: - Migrating forwards to 0001_initial > my_app:0001_initial - Loading initial data for my_app Migrated: - my_app . ----- Ran 1 test in 1s OK To create the test DB, has the test always used South migration in the past(before South 0.7) even if the output is not explicitly being shown?

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• sbt: "test" works "test:run" not

  - by Martin

  I try to establish a build pipeline on Jenkins with a Play(2.0.2) project. As I want to just build the sources once and use the classes for downstream builds, I now have created a "compile"-job, that runs "sbt test:compile". That works so far. The next job should then just run the compiled tests. If I use "sbt test" it works as expected, but compiles the sources again. But if I try to run "sbt test:run" it says: [info] Loading project definition from ~/myproject/project [info] Set current project to myproject (in build file: ~/myproject/) java.lang.RuntimeException: No main class detected. at scala.sys.package$.error(package.scala:27) [error] {file:~/myproject/test:run: No main class detected. The same happens locally. I can run "sbt test" but not "sbt test:run". Same error. Is there someone who can point me to the right direction?

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• How to scroll and zoom in/out large images on iPhone?

  - by Horace Ho

  I have a large image, size around 30000 (w) x 6000 (h) pixels. You may consider it's like a big map. I assume I need to crop it up into smaller tiles. Questions: what are the right ViewControllers to use? (link) what is the tile strategy? (I put this in another question, as it's not iPhone specific) Requirements: whole image (though cropped) can be scrolled up/down/left/right by swipes zoom in (up to pixel-to-pixel) out (down to screen-fit-by-height) by the 2-finger operation memory efficiency by lazy loading tiles Bonus requirements: automatic scroll, say from left to right slowly and smoothly Thanks!

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• Scriptaculous Autocomplete to activate when the page is loaded.

  - by Jelle

  Is there a way to fire up Scriptaculous's Autocomplete to search with the default word from the inputfield when the page is loaded? Something like this? <input type="text" id="autocomplete" class="autocomplete_input" name="autocomplete_parameter" value="friends"/> <span id="indicator1" style="display: none"> loading </span> <div id="autocomplete_choices" class="autocomplete"> </div> <script type="text/javascript"> function AutoComp() { var myAutoCompleter = new Ajax.Autocompleter("autocomplete", "autocomplete_choices", "url", {indicator: 'indicator1',}); } document.onLoad = AutoComp.activate(); </script>

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• Quaere - Anyone using it yet? (LINQ to Objects for Java)

  - by Marty Pitt

  Hi there I'm a .NET guy originally, working in Java recently, and finding I'm really missing LINQ to Objects, specifically for performing filtering against collections. A few people here on Stack Overflow have answered the "LINQ for Java?" question with a single word : Quaere However, on the site it clearly states "Pre-Beta", and there's been no commits to their code for over a year, so I'm guessing the project is pretty much dead. Is anyone actually using this, and / or have any experience with it? The second most common answer appears to be "use Google Collections". Is this the most appropriate Java way? Cheers Marty

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• Multi-platform development from one computer

  - by iama

  I am planning to build a new development computer for both Windows & Linux platforms. On Windows, my development would be primarily in .NET/C#/IIS/MSSQL Server. On Linux—preferably Ubuntu—my development would be in Ruby and Python. I am thinking of buying a laptop with Windows 7 pre-installed with 4GB RAM, Intel Core 2 Duo, and 320 GB HD; running 2 VMs for both Windows and Linux development with the host OS as my work station. Of course, I would be running DBs and web servers on the respective platforms. Is this a typical setup? My only concern is running two VMs side by side. Not sure if this configuration would be optimal. Alternative would be to do my Windows development on the host Windows 7 OS. What are your thoughts?

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• How to marshal structs with unknown length string fields in C#

  - by Ofir

  Hi all, I get an array of bytes, I need to unmarshal it to C# struct. I know the type of the struct, it has some strings fields. The strings in the byte array appears as so: two first bytes are the length of the string, then the string itself. I don;t know the length of the strings. I do know that its Unicode! [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)] public class User { int Id;//should be 1 String UserName;//should be OFIR String FullName;//should be OFIR } the byte array looks like so: 00,00,01,00, 00,00,08,00, 4F,00,46,00,49,00,52,00, 00,00,08,00, 4F,00,46,00,49,00,52,00, I also found this link with same problem unsolved: loading binary data into a structure Thank you all, Ofir

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• How do I get the position of a result in the list after an order_by?

  - by Bob Bob

  I'm trying to find an efficient way to find the rank of an object in the database related to it's score. My naive solution looks like this: rank = 0 for q in Model.objects.all().order_by('score'): if q.name == 'searching_for_this' return rank rank += 1 It should be possible to get the database to do the filtering, using order_by: Model.objects.all().order_by('score').filter(name='searching_for_this') But there doesn't seem to be a way to retrieve the index for the order_by step after the filter. Is there a better way to do this? (Using python/django and/or raw SQL.) My next thought is to pre-compute ranks on insert but that seems messy.

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• Compressing large text data before storing into db?

  - by Steel Plume

  Hello, I have application which retrieves many large log files from a system LAN. Currently I put all log files on Postgresql, the table has a column type TEXT and I don't plan any search on this text column because I use another external process which nightly retrieves all files and scans for sensitive pattern. So the column value could be also a BLOB or a CLOB, but now my question is the following, the database has already its compression system, but could I improve this compression manually like with common compressor utilities? And above all WHAT IF I manually pre-compress the large file and then I put as binary into the data table, is it unuseful as database system provides its internal compression?

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• Task management algorithm in C#

  - by silverwizz

  Hi guys, i am looking for efficient task management fo C# what i mean by task management is executing pre-defined interval time of task. Example: task a needs to be run every 1 mins task b needs to be run every 3 mins task c needs to be run every 5 mins these tasks can be added and removed in arbitary time... And the task that i mentioned can be 100000 or more... The task will bw executed forever until it is removed... Do u guys familiar with this kind of algorithm? I am thinking to implement in either c# or php.... Thanks

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• When are reference files(dlls) loaded?

  - by Daniel

  I wrote a program that makes a reference to Microsoft.Web.Administration.dll, which is not present on Windows Server 2003. The program checks for the os and does not reference the dll if the os is 2003. if(OSVersion == WindowsServer2003) //do the job without referencing the Microsoft.Web.Administration.<br> else if(OSVersion == WindowsServer2008) //reference the Microsoft.Web.Administration.dll file.<br> When I tested this program on Windows Server 2003, an error occured telling me it couldn't locate the Microsoft.Web.Administration.dll. But when I separated the if-else block into 2 different methods as below, and the error did not occur. if(OSVersion == WindowsServer2003) //do the job without referencing the Microsoft.Web.Administration.<br> else if(OSVersion == WindowsServer2008) //DoIt2008Style(); So I wanted to know about reference file loading time in more detail. could you point me to some resources?

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• Android WebView not respecting scaling percentage...

  - by fiXedd

  I have a WebView which I'm trying to have scale to a certain percent on loading the page. The iPhone version of this software uses the HTML meta-tag: <meta name="viewport" content="width=320, initial-scale=0.95, maximum-scale=2.0, user-scalable=1"> Since Android's WebView doesn't seem to respect that tag I hard-coded the percent using setInitialScale(). However, the WebView is just flat-out ignoring this method call. No matter what number I put in there it shows at 100%. Ideas?

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• Asynchronous Request make for-Loop waiting for didFinishLoading

  - by rdesign

  Hey guys, I have a asynchronous url request within a for loop. This loop is called 20 times, each time one parameter of the webaddress is changed. Everytime the didFinishLoading method is called I want to hand over the data of this specific webadress. The problem now is that when I run the for loop, the didFinishLoading method is not called, only at the end. Any suggenstions on how to make the loop wait for complete loading the data for the specific URL? Thanks a lot.

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• UIWebView loads a local file for a long time

  - by Knodel

  I have a UIWebView which loads .rtfd.zip files like this: -(void)viewWillAppear:(BOOL)animated { self.title=@"Title"; if(rowPosledovatelnosti==0) { [self loadFile:@"PosledovatelnostiObzie.rtfd.zip"]; } if(rowPosledovatelnosti==1) { [self loadFile:@"Arifmeticheskaya.rtfd.zip"]; } if(rowPosledovatelnosti==2) { [self loadFile:@"Svojstva_Arifmeticheskoj.rtfd.zip"]; } if(rowPosledovatelnosti==3) { [self loadFile:@"Geometricheskaya.rtfd.zip"]; } if(rowPosledovatelnosti==4) { [self loadFile:@"Predel_Posledovatelnosti.rtfd.zip"]; } if(rowPosledovatelnosti==5) { [self loadFile:@"Summa_Geometricheskoy.rtfd.zip"]; } } But on the device it takes some time for the UIWebView to load the content. Is there any way to optimize the loading time?

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• JavaScript - Textarea Selection

  - by brad

  The Problem I am working on an in-browser editor within a textarea. I have started looking for some information on dealing with textarea selection and found this jQuery plugin that does some simple manipulation. However, it doesn't explain what's going on. The Question Where can I find a good resource on Textarea Selection in JavaScript, preferably with a description of both pre-DOM3 and post-DOM30 scenarios? [Edit] In a great answer from Borgar, I have found several different places to start with contentEditable, selectionStart, and selectionEnd. I'll be looking into these things and posting any good tutorials I might find.

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• Can't check more than one RadioButton across multiple items in a Treeview

  - by Mike Johnston

  I’m using a TreeView control to present a list of Questions. Using the Prism.DataTemplateSelector, I'm loading a View (.xaml file) that represents a single Question into each node in the TreeView. In the View for that question is a ListBox containing RadioButtons (one for each item in a Picklist object that the ListBox is bound to). The radio buttons work as expected for the question, but when I check a RadioButton on another node/question in the TreeView, the check for the button in the Question I was editing before disappears. In other words, I'm only able to check one RadioButton in the whole list of Questions/Items bound to the containing TreeView. How do I group the RadioButtons in the ListBox to the scope of the single question instead of all the questions in the TreeView.

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• Wicket app in embedded Jetty causes UnsupportedClassVersionError

  - by Ondra Žižka

  I've tried to run a Wicket app in an embedded Jetty, using this code: public static void main( String[] args ){ Server server = new Server(8080); Context root = new Context( server, "/", Context.SESSIONS ); FilterHolder filterHolder = new FilterHolder( new WicketFilter() ); filterHolder.getInitParameters().put("applicationClassName", cz.dw.test.WicketApplication.class.getName() ); root.addFilter( filterHolder, "/*" , Handler.ALL ); try { server.start(); } catch (Exception ex) { ex.printStackTrace(); } } But I got java.lang.UnsupportedClassVersionError: Bad version number in .class file. Switching the target class version for my app (1.6 - 1.5) did not help. I use Sun JDK 1.6.0_17, Wicket 1.4.8, Jetty 6.1.24. I tried to debug, but the JRE classes have no debug data. The stacktrace is of no use as it happens when loading the classes into JVM. Any ideas what could be wrong? How can I find which class is causing this? Thanks, Ondra

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• GenerateBootstrapper fails to create a working setup.exe

  - by Darren

  I’m seeing some odd behaviour I can’t explain. I'm using wix to generate a msi and using the msbuild GenerateBootstrapper task to handle pre-requisites. It all seems to build correctly i.e. there are no error or warnings but the generated setup.exe won’t run. It gives a nice blank error dialog and the event log gives about the same information. The kicker is that if I drop to the command line and run msbuild manually on the project and specify the bootstrapper target it generates a correct and working setup.exe. I've used this wix article as a base and a number of questions on StackOverflow to no avail. Has anyone seen this behaviour before, better still a fix?

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• Where to open sessions in a Spring/Hibernate stack?

  - by CaptainAwesomePants

  I'm trying to figure out a good design for a Spring/Hibernate app. When creating such an app, it appears like there are a handful of major decisions. The first major decision seems to be where to put the session/transaction boundary. It seems like I have 3 major choices: as a filter before controllers are even invoked, immediately below the controllers at the service call level, and stuffed way below the business level in repository calls. It seems to me like the right call is the middle path, but I'm not sure. I don't want my transactions open too long, but at the same time, I don't want to constantly worry about detached objects and lazy loading in the business logic. Still, there are some downsides. For instance, it makes it hard for the business logic to make a remote call without holding up a transaction for a few seconds. I wonder if there's a better way?

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• Emailing HTML from within an iPhone app is stopping at special characters

  - by user141146

  Hi, I have an iPhone app that will let users email some pre-determined text as HTML. I'm having a problem in that if the text contains special characters within the text (e.g., ampersand &, , <), the NSString variable that I use for sending the body of the email gets truncated at the special character. I'm not sure how to fix this (I tried using the method stringByAddingPercentEscapesUsingEncoding…but this hasn't fixed the problems). Thoughts on what I'm doing wrong / how to fix it? Here is sample code showing what I'm trying to do Thanks!!! - (void)send_an_email:(id)sender { NSString *subject_string = [NSString stringWithFormat:@"Summary of %@", commercial_name]; NSString *body_string = [NSString stringWithFormat:@"%@<br /><br />", [self.dl email_message]]; // email_message returns the body of text that should be shipped as html. If email_message contains special characters, the text truncates at the special character NSString *full_string = [NSString stringWithFormat:@"mailto:?to=&subject=%@&body=%@", [subject_string stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding], [body_string stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]]; [[UIApplication sharedApplication] openURL:[[NSURL alloc] initWithString:full_string]]; }

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• Disable animation when moving CALayers

  - by Sean Clark Hess

  The following code animates the movement, even though I didn't use beginAnimations:context. How do I get it to move without animating? This is a new iphone view project, and these are the only updates to it. // Implement viewDidLoad to do additional setup after loading the view, typically from a nib. - (void)viewDidLoad { [super viewDidLoad]; sublayer = [CALayer new]; sublayer.backgroundColor = [[UIColor redColor] CGColor]; sublayer.frame = CGRectMake(0, 0, 100, 100); [self.view.layer addSublayer:sublayer]; } - (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event { sublayer.position = [[touches anyObject] locationInView:self.view]; }

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• How to block the UI during asynchronous operations in WPF

  - by mcintyre321

  We have a WPF app (actually a VSTO WPF app). On certain controls there are multiple elements which, when clicked, load data from a web service and update the UI. Right now, we carry out these web requests synchronously, blocking the UI thread until the response comes back. This prevents the user clicking around the app while the data is loading, potentially putting it into an invalid state to handle the data when it is returned. Of course the app becomes unresponsive if the request takes a long time. Ideally, we'd like to have the cancel button active during this time, but nothing else. Is there a clever way of doing this, or will we have to switch the requests to execute asynchronously using backgroundworker and write something that disables all the controls apart from the cancel button while a request is in progress?

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• Does Ruby on Rails "has_many" array provide data on a "need to know" basis?

  - by Jian Lin

  On Ruby on Rails, say, if the Actor model object is Tom Hanks, and the "has_many" fans is 20,000 Fan objects, then actor.fans gives an Array with 20,000 elements. Probably, the elements are not pre-populated with values? Otherwise, getting each Actor object from the DB can be extremely time consuming. So it is on a "need to know" basis? So does it pull data when I access actor.fans[500], and pull data when I access actor.fans[0]? If it jumps from each record to record, then it won't be able to optimize performance by doing sequential read, which can be faster on the hard disk because those records could be in the nearby sector / platter layer -- for example, if the program touches 2 random elements, then it will be faster just to read those 2 records, but what if it touches all elements in random order, then it may be faster just to read all records in a sequential way, and then process the random elements. But how will RoR know whether I am doing only a few random elements or all elements in random?

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• how to implement unitofwork pattern when using subsonic 2.1(Repository pattern) ?

  - by ROHITH

  I am using subsonic repository pattern(2.1) for asp.net mvc application.In my application,there are many repositories like categoryRepository,Blogrepository etc.Inside each of this repository i am calling subsonic's DB.Select().From()...ExecuteReader() and then loading domain objects from those reader. In the controller action i make multiple calls from these repositories for e.g. List<IBlog> blogs=_blogRepository.GetHottestBlogs(); List<ICategory> categories=_categoryRepository.GetAll(); do i have to implement any unitofwork pattern for this ?.My doubt is that how subsonic performs each operation DB.Update/Insert/Select .Is a TransactionScope is enough for batch update or do i have to use SharedDbConnectionScope to get better performance?

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• C# - Hiding ListViewItem based on a filter

  - by fonix232

  I want to hide some items based on a text filter in a ListView. Basically the listview loads the items from a text file, and I don't want it to be read and/or written when the user searches the list. The search is done in a combobox's KeyDown event, but there is no "Visible" property of the ListViewItem. Is there any easy way to do this, WITHOUT re-reading the file? (as it is an XML file, and it could even contain thousands of items, it would be hard to search efficiently and even let the user use the application, as the search would take for minutes (mostly with the loading)).

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