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  • Singleton by Jon Skeet clarification

    - by amutha
    public sealed class Singleton { Singleton() { } public static Singleton Instance { get { return Nested.instance; } } class Nested { // Explicit static constructor to tell C# compiler // not to mark type as beforefieldinit static Nested() { } internal static readonly Singleton instance = new Singleton(); } } I wish to implement Jon Skeet's Singleton pattern in my current application in C#. I have two doubts on the code 1) How is it possible to access the outer class inside nested class? I mean internal static readonly Singleton instance = new Singleton(); Is something called closure? 2) I did not get this comment // Explicit static constructor to tell C# compiler // not to mark type as beforefieldinit what does this comment suggest us?

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  • Flex secret for session using Facebook API

    - by Mike
    In this video, it mentioned not to embed the Facebook secret key inside the application, http://www.adobe.com/devnet/facebook/articles/video_facebook_quick_start.html, so I passed null to this function facebookSession = new FacebookSessionUtil(MYAPI, null, stage.loaderInfo); but it didn't work. How can I hide my secret key? In the doc it mentioned: http://facebook-actionscript-api.googlecode.com/svn/release/current/docs/com/facebook/utils/FacebookSessionUtil.html secret:String — Your application's secret key. If this parameter is passed a value of null, the constructor looks for a special session secret stored in the fb_sig_ss property of the loaderInfo object. For web sessions, even if you pass a non-null value for this parameter, the constructor will always look for a session secret and use that instead of the value that you pass for this parameter.

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  • iText - Modifying PDFWriter# Verticle Alignment manually

    - by simon622
    Ive hit upon a problem using iText (java), despite hours of looking thru the docs.. Most of the code I use goes via the Document# API which tracks (via the PDFWriter instance) the current Y position. HOWEVER, we need to use the PdfContentByte part of the API to insert some Java2d into the document, but in doing so this appears to bypass the logic which tracks verticle writes. So next time I use the Document API, it overwrites the contents of the manually inserted things. I want to mimick the behaviour of the Document# API by manually moving the cursor on N number of units (N being the height of the element inserted by the PDFContentByte API), such that when I then use the Document object again, bingo, its cursor is in the correct location. I can see that a method to obtain the cursor exists; PdfWriter#getVerticalPosition(boolean); But not one to set it?! Any ideas anyone? Thanks.

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  • UITableView custom popping

    - by ckrames1234
    Okay, I made an app that has a list of items as a main view, and when you select an item it pushes a detail view controller. In this detail view controller you can switch between items. I want to be able to push a view, scroll a few items, and pop the view as if the current item was initially selected. I want to push a view, and then when i pop it, i want it to look like a different view was initially pushed. Here's a rough image, because its hard to explain in writing: http://96.248.81.29:83/misc/PushPopSituation.png (Thats a fixed IP, its not going anywhere) If anyone knows how I could do something like this, it would be a great help to me.

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  • Mavericks system Ruby and gem broken

    - by T1000
    When I tried to run ruby -v or gem -v (or any other command), I get: dyld: lazy symbol binding failed: Symbol not found: _ruby_run Referenced from: /usr/local/bin/ruby Expected in: /usr/lib/libruby.dylib dyld: Symbol not found: _ruby_run Referenced from: /usr/local/bin/ruby Expected in: /usr/lib/libruby.dylib This is after I ran rvm system to temporally switch to the system default Ruby. RVM is working fine, but I have a special need to install a gem to the system Ruby and I can't because of this problem. Does anyone know why? It seems to be some kind of link problem to Ruby, but I'm don't know how to solve this. I ran which ruby and it's at this point located in "/usr/local/bin/ruby". I checked the Ruby in "/usr/lib/" and it's pointing to my system Ruby: "../../System/Library/Frameworks/Ruby.framework/Versions/Current/usr/lib/ruby" Any help would be appreciated.

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  • Custom NSStatusItem with custom view - Use NSWindow, NSView, custom NSMenuItem?

    - by Luc
    I'm trying to create a LSUIElement app that behaves like Spotlight, CoverSutra and other apps of that type. I managed to create a custom NSStatusItem, which popups up an NSWindow but the problem is that the app that currently has focus will the focus to my custom NSWindow. I've based myself on Matt Gemmell's example (http://mattgemmell.com/2008/03/04/using-maattachedwindow-with-an-nsstatusitem) For example, if you're in Safari and click on the Spotlight icon, the current Safari window does not gray out and keeps focused. When you press ESC in Spotlight, the focus is back to the Safari window. I haven't managed to do this with my custom NSWindow. I have to click back on a window to set focus back to it. So I'd like to know which route to go to achieve this. Is the solution a NSWindow, NSPanel, NSMenu with a custom NSMenuItem?

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  • Location.getTime() returning a future time.

    - by fiXedd
    The following code: // get the last known location Criteria c = new Criteria(); c.setAccuracy(Criteria.ACCURACY_FINE); Location lastKnown = mLocationManager.getLastKnownLocation(mLocationManager.getBestProvider(c, true)); // compare times long currentTime = System.currentTimeMillis(); long gpsTime = lastKnown.getTime(); long age = (currentTime - gpsTime) / 1000; Gives me: currentTime = 1270062152738 gpsTime = 1270085378000 age = -23225 If you'll notice, it's returning the last location fix's time as a time in the future. Why is this happening? EDIT: From Location.getTime() : Returns the UTC time of this fix, in milliseconds since January 1, 1970. From System.currentTimeMillis() : Returns the current system time in milliseconds since January 1, 1970 00:00:00 UTC. This method shouldn't be used for measuring timeouts or other elapsed time measurements, as changing the system time can affect the results.

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  • Getting ANT to scp only new/changed files

    - by Artem
    I would like to optimize my scp deployment which currently copies all files to only copy files that have changed since the last build. I believe it should be possible with the current setup somehow, but I don't know how to do this. I have the following: Project/src/blah/blah/ <---- files I am editing (mostly PHP in this case, some static assets) Project/build <------- I have a local build step that I use to copy the files to here I have an scp task right now that copies all of Project/build out to a remote server when I need it. Is it possible to somehow take advantage of this extra "build" directory to accomplish what I want -- meaning I only want to upload the "diff" between src/** and build/**. Is it possible to somehow retrieve this as a fileset in ANT and then scp that? I do realize that what it means is that if I somehow delete/mess around with files on the server in between, the ANT script would not notice, but for me this is okay.

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  • problem with tabbed interface as mentioned in the article of josh smith

    - by Egi
    hello guys, i ve got a problem with my programm. here is the link: http://dl.dropbox.com/u/2734432/TabbedInterface.7z once u have opened both tabs, u ll start loosing the references to other collections of the current item in the view. that is because these ids are nullable and once you switch over to the other tab they ll become null. my question is why and how can i corrent that behavoir? if you change the int? to int there are no more problem, but i need them to be nullable!

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  • HttpWebResponse with MJPEG and multipart/x-mixed-replace; boundary=--myboundary response content typ

    - by arri.me
    I have an ASP.NET application that I need to show a video feed from a security camera. The video feed has a content type of 'multipart/x-mixed-replace; boundary=--myboundary' with the image data between the boundaries. I need assistance with passing that stream of data through to my page so that the client side plugin I have can consume the stream just as it would if I browsed to the camera's web interface directly. The following code does not work: //Get response data byte[] data = HtmlParser.GetByteArrayFromStream(response.GetResponseStream()); if (data != null) { HttpContext.Current.Response.OutputStream.Write(data, 0, data.Length); } return;

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  • AVR sbi command - Error: number must be positive and less than 32

    - by Simon
    I've spent a good while getting my AVR development system set up with the full GCC tool chain (everything is the most recent current stable version) and I have solved most issues with it but one. This following code gives me an error which I just don't get. The AVR assembly manual states that the sbi instruction can accept 0-7 as a constant expression but it still errors out on me. Can anyone shed some light onto why it does this please? #ifndef __AVR_ATmega168__ #define __AVR_ATmega168__ #endif #include <avr/io.h> rjmp Init Init: ser r16 out DDRB, r16 out DDRD, r16 clr r16 out PORTB, r16 out PORTD, r16 Start: sbi PORTB, 0 rjmp Start The line in question is sbi PORTB, 0. Compiled / assembled with: avr-gcc ledon.S -mmcu=atmega168

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  • In Eclipse RCP, how do I disable a save toolbar button according to the "dirty" property in editor

    - by paulgreg
    In my eclipse RCP 3.3 application, I would like to enable or disable a 'save' toolbar button according to current editor dirty flag. I'm trying to use the <enabledWhen tag but I can't make it work. Here's the portion of code in plugin.xml : <command commandId="org.acme.command.save" icon="icons/save.png" id="org.acme.command.save" style="push"> <enabledWhen> <instanceof value="activeEditor"/> <test property="dirty" value="true"/> </enabledWhen> </command> Do you have any idea how that is supposed to work ?

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  • CodePlex Daily Summary for Monday, March 05, 2012

    CodePlex Daily Summary for Monday, March 05, 2012Popular ReleasesSimple Injector: Simple Injector v1.4.1: This release adds two small improvements to the SimpleInjector.Extensions.dll. No changes have been made to the core library. New features and improvements in this release for the SimpleInjector.Extensions.dll The RegisterManyForOpenGeneric extension methods now accept non-generic decorator, as long as they implement the given open generic service type. GetTypesToRegister methods added to the OpenGenericBatchRegistrationExtensions class which allows to customize the behavior. Note that the...SQL Scriptz Runner: Application: Scriptz Runner source code and applicationCommonLibrary: Code: CodePowerGUI Visual Studio Extension: PowerGUI VSX 1.5.2: Added support for PowerGUI 3.2.Path Copy Copy: 10.0: New version with the following biggest new features: Regular expression support in custom commands (see this work item) Import/export feature for custom commands (see this work item) This version also addresses the following work items: 11353 11348 This version is a recommended upgrade for all users. Note: new custom commands that user regular expressions won't be compatible with earlier versions (if installed by registry manipulation or via network installation), but everything else is ...VidCoder: 1.3.1: Updated HandBrake core to 0.9.6 release (svn 4472). Removed erroneous "None" container choice. Change some logic and help text to stop assuming you have to pick the VIDEO_TS folder for a DVD scan. This should make previewing DVD titles on the Queue Multiple Titles window possible when you've picked the root DVD directory.ASP.NET MVC Framework - Abstracting Data Annotations, HTML5, Knockout JS techs: Version 1.0: Please download the source code. I am not associating any dll for release.ExtAspNet: ExtAspNet v3.1.0: ExtAspNet - ?? ExtJS ??? ASP.NET 2.0 ???,????? AJAX ?????????? ExtAspNet ????? ExtJS ??? ASP.NET 2.0 ???,????? AJAX ??????????。 ExtAspNet ??????? JavaScript,?? CSS,?? UpdatePanel,?? ViewState,?? WebServices ???????。 ??????: IE 7.0, Firefox 3.6, Chrome 3.0, Opera 10.5, Safari 3.0+ ????:Apache License 2.0 (Apache) ??:http://extasp.net/ ??:http://bbs.extasp.net/ ??:http://extaspnet.codeplex.com/ ??:http://sanshi.cnblogs.com/ ????: +2012-03-04 v3.1.0 -??Hidden???????(〓?〓)。 -?PageManager??...AcDown????? - Anime&Comic Downloader: AcDown????? v3.9.1: ?? ●AcDown??????????、??、??????,????1M,????,????,?????????????????????????。???????????Acfun、????(Bilibili)、??、??、YouTube、??、???、??????、SF????、????????????。??????AcPlay?????,??????、????????????????。 ● AcDown???????????????????????????,???,???????????????????。 ● AcDown???????C#??,????.NET Framework 2.0??。?????"Acfun?????"。 ????32??64? Windows XP/Vista/7/8 ????????????? ??:????????Windows XP???,?????????.NET Framework 2.0???(x86),?????"?????????"??? ??????????????,??????????: ??"AcDo...Windows Phone Commands for VS2010: Version 1.0: Initial Release Version 1.0 Connect from device or emulator (Monitors the connection) Show Device information (Plataform, build , version, avaliable memory, total memory, architeture Manager installed applications (Launch, uninstall and explorer isolate storage files) Manager core applications (Launch blocked applications from emulator (Office, Calculator, alarm, calendar , etc) Manager blocked settings from emulator (Airplane Mode, Celullar Network, Wifi, etc) Deploy and update ap...DNN Metro7 style Skin package: Metro7 style Skin for DotNetNuke 06.01.00: Changes on Version 06.01.00 Fixed issue on GraySmallTitle container, that breaks the layout Fixed issue on Blue Metro7 Skin where the Search, Login, Register, Date is missing Fixed issue with the Version numbers on the target file Fixed issue where the jQuery and jQuery-UI files not deleted on upgrade from Version 01.00.00 Added a internal page where the Image Slider would be replaces with a BannerPaneMedia Companion: MC 3.433b Release: General More GUI tweaks (mostly imperceptible!) Updates for mc_com.exe TV The 'Watched' button has been re-instigated Added TV Menu sub-option to search ALL for new Episodes (includes locked shows) Movies Added 'Source' field (eg DVD, Bluray, HDTV), customisable in Advanced Preferences (try it out, let us know how it works!) Added HTML <<format>> tag with optional parameters for video container, source, and resolution (updated HTML tags to be added to Documentation shortly) Known Issu...Picturethrill: Version 2.3.2.0: Release includes Self-Update feature for Picturethrill. What that means for users is that they are always guaranteed to have a fresh copy of Picturethrill on their computers with all latest fixes. When Picturethrill adds a new website to get pictures from, you will get it too!Simple MVVM Toolkit for Silverlight, WPF and Windows Phone: Simple MVVM Toolkit v3.0.0.0: Added support for Silverlight 5.0 and Windows Phone 7.1. Upgraded project templates and samples. Upgraded installer. There are some new prerequisites required for this version, namely Silverlight 5 Tools, Expression Blend Preview for Silverlight 5 (until the SDK is released), Windows Phone 7.1 SDK. Because it is in the experimental band, I have also removed the dependency on the Silverlight Testing Framework. You can use it if you wish, but the Ria Services project template no longer uses ...CODE Framework: 4.0.20301: The latest version adds a number of new features to the WPF system (such as stylable and testable messagebox support) as well as various new features throughout the system (especially in the Utilities namespace).MyRouter (Virtual WiFi Router): MyRouter 1.0.2 (Beta): A friendlier User Interface. A logger file to catch exceptions so you may send it to use to improve and fix any bugs that may occur. A feedback form because we always love hearing what you guy's think of MyRouter. Check for update menu item for you to stay up to date will the latest changes. Facebook fan page so you may spread the word and share MyRouter with friends and family And Many other exciting features were sure your going to love!WPF Sound Visualization Library: WPF SVL 0.3 (Source, Binaries, Examples, Help): Version 0.3 of WPFSVL. This includes three new controls: an equalizer, a digital clock, and a time editor.Orchard Project: Orchard 1.4: Please read our release notes for Orchard 1.4: http://docs.orchardproject.net/Documentation/Orchard-1-4-Release-NotesNetSqlAzMan - .NET SQL Authorization Manager: 3.6.0.15: 3.6.0.15 28-Feb-2012 • Fix: The communication object, System.ServiceModel.Channels.ServiceChannel, cannot be used for communication because it is in the Faulted state. Work Item 10435: http://netsqlazman.codeplex.com/workitem/10435 • Fix: Made StorageCache thread safe. Thanks to tangrl. • Fix: Members property of SqlAzManApplicationGroup is not functioning. Thanks to tangrl. Work Item 10267: http://netsqlazman.codeplex.com/workitem/10267 • Fix: Indexer are making database calls. Thanks to t...SCCM Client Actions Tool: Client Actions Tool v1.1: SCCM Client Actions Tool v1.1 is the latest version. It comes with following changes since last version: Added stop button to stop the ongoing process. Added action "Query update status". Added option "saveOnlineComputers" in config.ini to enable saving list of online computers from last session. Default value for "LatestClientVersion" set to SP2 R3 (4.00.6487.2157). Wuauserv service manual startup mode is considered healthy on Windows 7. Errors are now suppressed in checkReleases...New ProjectsAbsolute Risk Game: Risk Game is a classic "World Domination Risk" game where you try to conquer the world.Architecture Document Catalog: The Architecture Document Catalog is a catalog for various documentation used by software solution architects. The initial architecture framework supported is from Rozanski and Woods, also called Viewpoints and Perspectives. It's in C#, Silverlight, WCF RIA Services.Background Worker Job Execution & Job Scheduler: Background worker is a multi-threaded job execution and scheduling engine. Very similar to Quartz, but with a slightly different focus.BWOS: preparing a new operating system. and name BWOS. CommonLibrary: Common modules and componentesCustomizeTool: CustomizeToolData Foundry: Data Foundry is a Swiss army knife for database administrator. With capabilities to cross reference check data between tables to find orphaned data and table relations.Data Grid Extensions: Modular extensions for the DataGrid control. Attach filtering capabilities to your existing DataGrid.dk.Helper: dk.Helper makes it easier for tribal wars game players (divoke-kmene.sk) to manage common activities in game. It's developed in C#.ExEn: ExEn is a high-performance implementation of a subset of the XNA API that runs on Silverlight, iOS and Android.Extended Methods for .NET: Developed in VB.NET, this DLL includes some functions I came across over the internet. Originally they were functions. I made some changes to suit my work and recreated them as Extended methods. Currently includes two extended methods for the Image class and one extended method for the String class. I will update it with new methods as I go along.GestionarComenzi: Gestioneaza Comenzi - Firma transporturiGIS Library Management: GIS Library Management System.iFinity Cache Master for DotNetNuke: The iFinity DotNetNuke Cache Master is an Administration module for DotNetNuke. This module allows administrators to inspect the current contents of the ASP.NET Cache in their running DotNetNuke installation. A very useful tool for developers working with the DotNetNuke cache.intelliEssay Document Format Checker: This is a product that tries to check a document's format to see if it conforms to certain given standard.Just T[he]IP: "Just The IP" leverages the Bing API v2 and the ip: Bing Advanced Operator to list the other web sites hosted at this IP Address (that are indexed by Bing).KTool: Ktool is a tool for learning japanese kanji. This program is still in developed. Current version can only display and find a kanji word (Press ctrl-F on main screen for search). Developed in WPF, .NET 4.0Lab Checker: Lab Checker makes it easy for teacher to check students' programs. It allows a student to test his program on a set of test cases which eliminates the need to run the program manually.MeoBox Vera Control Plugin: This is my project for creating a plugin to control my MeoBox ( Scientific Atlanta ) using Vera ( www.micasaverde.com ) Should work with other TV2Client boxesNUnitTestHelper: NUnitTestHelper is a helper class for developing unit tests for C# applications with NUnit framework. This helper library provides set of classes and method which can be used for accomplishing faster unit test development for any kind of project. NUnitTestBase – Supports basic functionality for writing a unit test with NUnit framework. This base class provides built in support for mocking framework. This version provides support for Rhino mocking framework.OnlineExam: Common online examination system based on Asp.net MVC3 can used for knowledge test, I/Q test, college test or most other test project.Orchard Code Generation Extensions: Code Generation Extensions module for Orchard.OrchardTranstion_CN: Orchar?? OsAvatar: to next step showOwnTools: About my toolsPhone Finder App: PhoneFinder will be a Windows Phone platform app alternative for finding a lost or stolen phone. Our plan is to have additional functionality the Windows software does not include. It will be developed using ASP.NET MVC, SQL Server, C#, etc.PoshChat: PoshChat is a client/server chat program written in PowerShell. Supports multiple client connections to a single server to chat.Process Attachment And Secure Text: ProcessAttachmentAndSecureText is an Exchange Transport Agent DLL and associated ASPX page. It is used to 1) strip out attachments and send them to an upload portal, and 2) to strip out text from emails and send it to an upload portal. It is currently coded for Exchange 2010Resource Viewer - Visual Studio Extension: Simply put the “resource viewer extension” enables you to visually view your ResourceDictionary. To open it go to: View – Other Windows – Resource Viewer. When working with WPF/Silverlight you put your reusable resources in a common ResourceDictionary, those resources might be of type Style, SolidColorBrush, DrawingBrush, BitmapImage and more. The problems starts when you have that ResourceDictionary you have no way to see how your resources look like, making the work process (of both t...Scumm XNA: Scumm XNA is an engine that runs old school LucasArts graphical adventure games. It is written completely in C# and will run on PC, Xbox 360 and Windows phone. The code is inspired by ScummVM but this project is not a port, it is a complete rewrite in order to optimize the engine for the CLR. Of course, you will need to own the orinigal games in order to use it. Currently, I will focus my work on the great "Day of Tentacle" game specifically the CD version.SDX DataGrid: SDXDataGrid is a comprehensive data grid component for Microsoft .NET 3.5 web application developers. It is designed to ease the exhausting process of implementing the necessary code for sorting, navigation, grouping, searching and data editing in a data representation object.SQL Scriptz Runner: Features are : Drag And Drop script files Run a directory of script files Sql Script out put messages during execution Script passed or failed that are colored green and red (yellow for running) Stop on error option Open script on error option Run report with time taken for each uComponents Demo: A demo for the code of running uComponents in Umbraco siteUnixTable: UnixTable makes it easier to realize application to access database, with no code but only with visual instrument at runtime. You'll no longer have to write query or code to read table from database. It's developed in Visual Basic for .NET 4. VOA Player.NET: VOA Player is a lightweight windows client for listening VOA Special English. Because of GFW blocking it fetch RSS data via rss2proxy.appspot.com indirectly. User can view article page and listen MP3 stream. The project is a C# implementation of voaplayer.sinaapp.com.Windows Metafile Library: The library supports reading and writing WMF files. Source code is written in pure .NET from scratch following the Windows Metafile Format Specification.Windows Phone 7.1 + MicroFramework (a phone device as remote control): Windows Phone 7.1 + .Net MicroFramework (How use a windows phone device as remote control of a Fez Panda II/MicroFramework board). A windows phone device can be connected to a wifi network (for example a wifi router). If you have also a MicroFramework board connected to the wifi network; you can send some http rest commands from the windows phone device to the MicroFramework board. The microframework board, it must support the tcp/ip protocol through a connect shield. In this exaple it will...XBMC Cache Manager: A Windows Service to manage a shared XBMC MySQL database and shared cache folder.

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  • Need help with Swift mailer with Kohana wrapper

    - by alex
    My current code is this $swift = email::connect(); $swift->setSubject('hello') ->setFrom(array('[email protected]' => 'Alex')) ->setTo(array('[email protected]' => 'Alex')) ->setBody('hello') ->attach(Swift_Attachment::fromPath(DOCROOT . 'assets/attachments/instructions.pdf')); $swift->send(); The email::connect() returns an instance of SwiftMailer. As per these docs, it would seem that it should work. However, I get an error Fatal error: Call to undefined method Swift_Mailer::setSubject() in /home/user/public_html/application/classes/controller/properties.php on line 45 I've seen that email::connect() does exactly what the example code in the docs does. That is include the correct file return an instance of the library What am I doing wrong? Thanks

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  • UITableView backgroundColor always gray on iPad

    - by rjobidon
    Hi, When I set the backgroundColor for my UITableView it works fine on iPhone (device and simulator) but NOT on the iPad simulator. Instead I get a light gray background for any color I set including groupTableViewBackgroundColor. Steps to reproduce: Create a new navigation-based project. Open RootViewController.xib and set the table view style to "Grouped". Add this responder to the RootViewController:- (void)viewDidLoad { [super viewDidLoad]; self.view.backgroundColor = [UIColor blackColor]; } Select Simulator SDK 3.2, build and run. You will get a black background (device and simulator). Select your target in the project tree. Click on Project : Upgrade Current Target for iPad. Build and run. You will get a light gray background. Revert the table view style to Plain and you will get a black background. Thanks for your help!

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  • How to recursively display folders and sub folders with specific file types only using PHP5 Recursiv

    - by Jared
    Hi I am trying to get RecursiveDirectoryIterator class using a extension on the FilterIterator to work but for some reason it is iterating on the root directory only. my code is this. class fileTypeFilter extends FilterIterator { public function __construct($path) { parent::__construct(new RecursiveDirectoryIterator($path)); } public function accept() { $file = $this->getInnerIterator()->current(); return preg_match('/\.php/i', $file->getFilename()); } } $it = new RecursiveDirectoryIterator('./'); $it = new fileTypeFilter($it); foreach ($it as $file) { echo $file; } my directory structure is something like this. -Dir1 --file1.php --file2.php -Dir2 --file1.php etc etc But as I said before the class is not recursively iterating over the entire directory structure and is only looking at the root. Question is, how do use a basic RescursiveDirectoryIterator to display folders and then run the FilterIterator to only show the php files in those directorys? Cheers

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  • What is the best Battleship AI?

    - by John Gietzen
    Battleship! Back in 2003, (when I was 17,) I competed in a Battleship AI coding competition. Even though I lost that tournament, I had a lot of fun and learned a lot from it. Now, I would like to resurrect this competition, in the search of the best battleship AI. Here is the framework: Battleship.zip The winner will be awarded +450 reputation! The competition will be held starting on the 17th of November, 2009. No entries or edits later than zero-hour on the 17th will be accepted. (Central Standard Time) Submit your entries early, so you don't miss your opportunity! To keep this OBJECTIVE, please follow the spirit of the competition. Rules of the game: The game is be played on a 10x10 grid. Each competitor will place each of 5 ships (of lengths 2, 3, 3, 4, 5) on their grid. No ships may overlap, but they may be adjacent. The competitors then take turns firing single shots at their opponent. A variation on the game allows firing multiple shots per volley, one for each surviving ship. The opponent will notify the competitor if the shot sinks, hits, or misses. Game play ends when all of the ships of any one player are sunk. Rules of the competition: The spirit of the competition is to find the best Battleship algorithm. Anything that is deemed against the spirit of the competition will be grounds for disqualification. Interfering with an opponent is against the spirit of the competition. Multithreading may be used under the following restrictions: No more than one thread may be running while it is not your turn. (Though, any number of threads may be in a "Suspended" state). No thread may run at a priority other than "Normal". Given the above two restrictions, you will be guaranteed at least 3 dedicated CPU cores during your turn. A limit of 1 second of CPU time per game is allotted to each competitor on the primary thread. Running out of time results in losing the current game. Any unhandled exception will result in losing the current game. Network access and disk access is allowed, but you may find the time restrictions fairly prohibitive. However, a few set-up and tear-down methods have been added to alleviate the time strain. Code should be posted on stack overflow as an answer, or, if too large, linked. Max total size (un-compressed) of an entry is 1 MB. Officially, .Net 2.0 / 3.5 is the only framework requirement. Your entry must implement the IBattleshipOpponent interface. Scoring: Best 51 games out of 101 games is the winner of a match. All competitors will play matched against each other, round-robin style. The best half of the competitors will then play a double-elimination tournament to determine the winner. (Smallest power of two that is greater than or equal to half, actually.) I will be using the TournamentApi framework for the tournament. The results will be posted here. If you submit more than one entry, only your best-scoring entry is eligible for the double-elim. Good luck! Have fun! EDIT 1: Thanks to Freed, who has found an error in the Ship.IsValid function. It has been fixed. Please download the updated version of the framework. EDIT 2: Since there has been significant interest in persisting stats to disk and such, I have added a few non-timed set-up and tear-down events that should provide the required functionality. This is a semi-breaking change. That is to say: the interface has been modified to add functions, but no body is required for them. Please download the updated version of the framework. EDIT 3: Bug Fix 1: GameWon and GameLost were only getting called in the case of a time out. Bug Fix 2: If an engine was timing out every game, the competition would never end. Please download the updated version of the framework. EDIT 4: Results!

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  • Boost timed_wait leap seconds problem

    - by Isac
    Hi, I am using the timed_wait from boost C++ library and I am getting a problem with leap seconds. Here is a quick example from boosts documentation: boost::system_time const timeout=boost::get_system_time() + boost::posix_time::milliseconds(500); extern bool done; extern boost::mutex m; extern boost::condition_variable cond; boost::unique_lock<boost::mutex> lk(m); while(!done) { if(!cond.timed_wait(lk,timeout)) { throw "timed out"; } } The timed_wait function is returning 24 seconds earlier than it should. 24 seconds is the current amount of leap seconds in UTC. So, boost is widely used but I could not find any info about this particular problem. Has anyone else experienced this problem? What are the possible causes and solutions? Notes: I am using boost 1.38 on a linux system. I've heard that this problem doesn't happen on MacOS.

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  • C# XDocument Attribute Performance Concerns

    - by Dested
    I have a loaded XDocument that I need to grab all the attributes that equal a certain value and is of a certain element efficiently. My current IEnumerable<XElement> vm; if (!cacher2.TryGetValue(name,out vm)) { vm = project.Descendants(XName.Get(name)); cacher2.Add(name, vm); } XElement[] abdl = (vm.Where(a => a.Attribute(attribute).Value == ab)).ToArray(); cacher2 is a Dictionary<string,IEnumerable<XElement>> The ToArray is so I can evaluate the expression now. I dont think this causes any real speed concerns. The problem is the Where itself. I am searching through anywhere from 1 to 10k items. Any help?

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  • LIST<> AddRange throwing ArgumentException

    - by Tim
    Hi all, I have a particular method that is occasionally crashing with an ArgumentException: Destination array was not long enough. Check destIndex and length, and the array's lower bounds.: at System.Array.Copy(Array sourceArray, Int32 sourceIndex, Array destinationArray, Int32 destinationIndex, Int32 length, Boolean reliable) at System.Collections.Generic.List`1.CopyTo(T[] array, Int32 arrayIndex) at System.Collections.Generic.List`1.InsertRange(Int32 index, IEnumerable`1 collection) at System.Collections.Generic.List`1.AddRange(IEnumerable`1 collection) The code that is causing this crash looks something like this: List<MyType> objects = new List<MyType>(100); objects = FindObjects(someParam); objects.AddRange(FindObjects(someOtherParam); According to MSDN, List<.AddRange() should automatically resize itself as needed: If the new Count (the current Count plus the size of the collection) will be greater than Capacity, the capacity of the List<(Of <(T)) is increased by automatically reallocating the internal array to accommodate the new elements, and the existing elements are copied to the new array before the new elements are added. Can someone think of a circumstance in which AddRange could throw this type of exception?

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  • Confused about encryption with public and private keys (which to use for encryption)

    - by jax
    I am making a licensing system when clients ask my server for a license and I send them a license if they are permitted to have one. On my current system I encrypt the license using a single private key and have the public key embedded into the client application that they use to decrypt the license. It works! Others have told me that I should be encrypting with the public key on the server and distributing the private key to clients. I have searched the web and can see that sometimes they use the private key to encrypt and other times they use the public key to encrypt. In this case what am I supposed to do?

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  • Good Silverlight Custom ItemsControl Tutorial

    - by Steve Brouillard
    I'm afraid my Google-Foo is failing me again today. I'm trying to find a good tutorial on creating custom ItemsControls in Silverlight (though I imgaine a WPF version might work as well). I'm trying to create a custom ItemsControl that will be something of a virtualized ListBox. What I'm trying to accomplish isn't really similar enough to the current ListBox control to justify trying to modify the existing control, so I figure a custom one is in order here. I have a vague concept of how to accomplish it, but there are definite holes in my understanding. Thanks in advance

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  • How to handle the back button on Windows Phone 7

    - by David_001
    On the windows phone 7 emulator, when the hardware back button is pressed, the default behaviour is for it to close your current application. I want to override this default behaviour so that it navigates to the previous page in my application. After some research, it seems it should be possible to do this by overriding the OnBackKeyPress method, like so: protected override void OnBackKeyPress(System.ComponentModel.CancelEventArgs e) { // do some stuff ... // cancel the navigation e.Cancel = true; } However, clicking the back button still closes my application. Putting a breakpoint on the above method reveals that it is never called. I have another breakpoint on my application exit code, and this breakpoint is hit. Is there something else I need to do to intercept the back button?

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  • Visual Studio 2008 maintenance mode - I can't remember my installation source drive letter!!!

    - by Dave
    I've searched high and low for this and can't find the answer anywhere. I installed VS2008, but my drive letters are all mapped differently now, and of course I need to add a component to my current installation (VC++). But since I don't know which drive letter it was installed from, and since I don't want to try to figure it out the brute force way, I was hoping that someone here knew how to figure that out. I poked through HKCU and HKLM in the registry, hoping to find the info there, but couldn't. Does anyone know how to get this to work? Right now, I get the error "A selected drive is no longer valid. Please review your installation path settings before continuing with setup".

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  • Error in Encrypting web.config connection string

    - by Mohan
    Hi everybody, I am encrypting web.config file. My code is below. Configuration config = WebConfigurationManager.OpenWebConfiguration("~"); ConfigurationSection section = config.GetSection("connectionStrings"); if (!section.SectionInformation.IsProtected) { section.SectionInformation.ProtectSection("RSAProtectedConfigurationProvider"); config.Save(); } but this gives me error Object already exists. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.Security.Cryptography.CryptographicException: Object already exists.

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