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• PerlRegEx vs RegularExpressionsCore Delphi Units

  - by Jan Goyvaerts

  The RegularExpressionsCore unit that is part of Delphi XE is based on the latest class-based PerlRegEx unit that I developed. Embarcadero only made a few changes to the unit. These changes are insignificant enough that code written for earlier versions of Delphi using the class-based PerlRegEx unit will work just the same with Delphi XE. The unit was renamed from PerlRegEx to RegularExpressionsCore. When migrating your code to Delphi XE, you can choose whether you want to use the new RegularExpressionsCore unit or continue using the PerlRegEx unit in your application. All you need to change is which unit you add to the uses clause in your own units. Indentation and line breaks in the code were changed to match the style used in the Delphi RTL and VCL code. This does not change the code, but makes it harder to diff the two units. Literal strings in the unit were separated into their own unit called RegularExpressionsConsts. These strings are only used for error messages that indicate bugs in your code. If your code uses TPerlRegEx correctly then the user should not see any of these strings. My code uses assertions to check for out of bounds parameters, while Embarcadero uses exceptions. Again, if you use TPerlRegEx correctly, you should never get any assertions or exceptions. The Compile method raises an exception if the regular expression is invalid in both my original TPerlRegEx component and Embarcadero’s version. If your code allows the user to provide the regular expression, you should explicitly call Compile and catch any exceptions it raises so you can tell the user there is a problem with the regular expression. Even with user-provided regular expressions, you shouldn’t get any other assertions or exceptions if your code is correct. Note that Embarcadero owns all the rights to their RegularExpressionsCore unit. Like all the other RTL and VCL units, this unit cannot be distributed by myself or anyone other than Embarcadero. I do retain the rights to my original PerlRegEx unit which I will continue to make available for those using older versions of Delphi.

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• Why are my videos playing speeded up with no audio, but work fine if I log in as a guest?

  - by Martins Kruze

  Since the start of this week I have been experiencing a glitch in the multimedia on my Samsung R518 laptop. I have 2 problems: Videos in every player are speeded up around 2 or 4 times (including youtube.com (both HTML5 and flash variants), any other video on the web and videos on my laptop played by Totem Media Player), exception is VLC player, but 2nd problem does concern even that. There is no sound - simple as that (with or without headphones plugged in). These all problems are now, and has not seen before, I upgraded to Ubuntu 10.10 after it was possible, and from start I didn't have anything from this - it just started in this week. I haven't even putted new software in. I have more or less solved the question (kind of) - I just logged in as a guest - and it all works, but when I make a new user - it does not. Please help me. Some stats below: sudo lshw -c sound *-multimedia description: Audio device product: RV710/730 vendor: ATI Technologies Inc physical id: 0.1 bus info: pci@0000:01:00.1 version: 00 width: 32 bits clock: 33MHz capabilities: pm pciexpress msi bus_master cap_list configuration: driver=HDA Intel latency=0 resources: irq:48 memory:cfeec000-cfeeffff *-multimedia description: Audio device product: 82801I (ICH9 Family) HD Audio Controller vendor: Intel Corporation physical id: 1b bus info: pci@0000:00:1b.0 version: 03 width: 64 bits clock: 33MHz capabilities: pm msi pciexpress bus_master cap_list configuration: driver=HDA Intel latency=0 resources: irq:47 memory:fc200000-fc203fff sudo lshw -c video *-display description: VGA compatible controller product: M92 LP [Mobility Radeon HD 4300 Series] vendor: ATI Technologies Inc physical id: 0 bus info: pci@0000:01:00.0 version: 00 width: 32 bits clock: 33MHz capabilities: pm pciexpress msi vga_controller bus_master cap_list rom configuration: driver=radeon latency=0 resources: irq:46 memory:d0000000-dfffffff ioport:2000(size=256) memory:cfef0000-cfefffff memory:cfe00000-cfe1ffff

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• Linking one uniform variable to many shaders

  - by Winged

  Let's say, that I have 3 programs, and in each of those programs there is a view matrix uniform, which should be the same in all those programs. Right now, when my camera moves, I need to re-upload the modified matrix to every program separately. Is it possible to create some kind of global uniforms which are constant for all programs linked to it, so I could just upload the matrix once? I tried creating a globalUniforms object which looked kinda like this: var globalUniforms = { program: {}, // (...) vMatrixUniform: null, // (...) initialize: function() { vMatrixUniform = gl.getUniformLocation(this.program, 'uVMatrix'); } }; So I could just link it to proper programs like this: program.vMatrixUniform = globalUniforms.vMatrixUniform;, and then pass the matrix like this: if (camera.isDirty.viewMatrix !== false) { camera.isDirty.viewMatrix = false; gl.uniformMatrix4fv(globalUniforms.vMatrixUniform, false, camera.viewMatrix.element); } but unfortunately it throws an error: Uncaught exception: gl.INVALID_VALUE was caused by call to: getUniformLocation called from line 272, column 2 in () in mysite/js/mesh.js: vMatrixUniform = gl.getUniformLocation(this.program, 'uVMatrix'); Summing up: is there a more efficient way of managing shaders which follows my logic?

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• Calling COM from Intel Fortran?

  - by user57460

  I'm trying to get COM working from my Fortran application. I do a "COMINITIALIZE" followed by a "COMCreateObjectByProgID". Both of these appear to be successful and return a status of zero. However, when I try to use the COM object, I get "Unhandled exception at 0x00000000 in FortranProg01.exe: 0xC0000005: Access violation." I realize that this error can mean almost anything, but has anyone got some suggestions of common problems with COM that produce this problem? Here are some more details. My program code: program FortranProg01 use myolepg implicit none integer*4 comInitStatus integer:: comCreateStatus INTEGER(INT_PTR_KIND()) $OBJECT INTEGER(4) funcResult REAL(8) pkgVersion call COMINITIALIZE(comInitStatus) print *, comInitStatus call COMCreateObjectByProgID('MyOlePg.MyOlePkg', $OBJECT, comCreateStatus) print *, comCreateStatus funcResult = IMyOlePkg_GetPackageVersion($OBJECT, pkgVersion) print *, funcResult call COMUNINITIALIZE() end program FortranProg01 The wizard-generated interface code: INTERFACE !property PackageVersion INTEGER(4) FUNCTION IMyOlePkg_GetPackageVersion($OBJECT, pVal) INTEGER(INT_PTR_KIND()), INTENT(IN) :: $OBJECT ! Object Pointer !DEC$ ATTRIBUTES VALUE :: $OBJECT REAL(8), INTENT(OUT) :: pVal !DEC$ ATTRIBUTES REFERENCE :: pVal !DEC$ ATTRIBUTES STDCALL :: IMyOlePkg_GetPackageVersion END FUNCTION IMyOlePkg_GetPackageVersion END INTERFACE Any help would be much appreciated! Thanks! Brad.

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• Delphi Client-Server Application using Firebird 2.5 error

  - by Japie Bosman

  I have got a lengthy question to ask. First of all Im still very new when it comes to Delphi programming and my experience has beem mostly developing small single user database applications using ADO and an Access database. I need to take the transition now to a client server application and this is where the problem starts. I decided to use Firebird 2.5 embeded as my database, as it is open source, and it is can be used with the interbase components in Delphi and that multiple clients can access the database simultanously. So I followed the interbase tutorial in Delphi. I managed to connect the client to the server and see the data in the example (While both are running on my pc), but when i tried to move the client to another pc, keeping the server on mine and running it to see if I can connect to the server it gave me the following error. Exception EIdSocketError in module clientDemo.exe at 0029DCAC. Socket Error # 10061 Connection refused. I understand that this might be because the host is defined as localhost in the client. But here is my first question. In the TSQLConncetion you can set die hostname under Driver-Hostname. The thing I want to know is how do you do this at run time, as I cannot get the property when I try and make an edit box to allow the user to enter the value and then set it via code like for example: SQLConncetion1.Driver.Hostname := edtHost.text; The thing is there is not such property to set, so how do you set the hostname at run time? Im using Delphi XE2 There is still a lot of questions to come especially when it comes to deployment, but I will take this piece by piece and I appreciate the advice.

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• CodePlex Daily Summary for Thursday, July 31, 2014

  CodePlex Daily Summary for Thursday, July 31, 2014Popular ReleasesDbEntry.Net (Leafing Framework): DbEntry.Net 4.2: DbEntry.Net is a lightweight Object Relational Mapping (ORM) database access compnent for .Net 4.0+. It has clearly and easily programing interface for ORM and sql directly, and supoorted Access, Sql Server, MySql, SQLite, Firebird, PostgreSQL and Oracle. It also provide a Ruby On Rails style MVC framework. Asp.Net DataSource and a simple IoC. DbEntry.Net.v4.2.Setup.zip include the setup package. DbEntry.Net.v4.2.Src.zip include source files and unit tests. DbEntry.Net.v4.2.Samples.zip ...Recaptcha for .NET: Recaptcha for .NET v1.5: What's NewMinor bug fixes Support for legacy .NET framework 4.0 and ASP.NET MVC 4. Support for .NET Framework 4.5.1.Azure Storage Explorer: Azure Storage Explorer 6 Preview 1: Welcome to Azure Storage Explorer 6 Preview 1 This is the first release of the latest Azure Storage Explorer, code-named Phoenix. What's New?Here are some important things to know about version 6: Open Source Now being run as a full open source project. Full source code on CodePlex. Collaboration encouraged! Updated Code Base Brand-new code base (WPF/C#/.NET 4.5) Visual Studio 2013 solution (previously VS2010) Uses the Task Parallel Library (TPL) for asynchronous background operat...Wsus Package Publisher: release v1.3.1407.29: Updated WPP to recognize the very latest console version. Some files was missing into the latest release of WPP which lead to crash when trying to make a custom update. Add a workaround to avoid clipboard modification when double-clicking on a label when creating a custom update. Add the ability to publish detectoids. (This feature is still in a BETA phase. Packages relying on these detectoids to determine which computers need to be updated, may apply to all computers).VG-Ripper & PG-Ripper: PG-Ripper 1.4.32: changes NEW: Added Support for 'ImgMega.com' links NEW: Added Support for 'ImgCandy.net' links NEW: Added Support for 'ImgPit.com' links NEW: Added Support for 'Img.yt' links FIXED: 'Radikal.ru' links FIXED: 'ImageTeam.org' links FIXED: 'ImgSee.com' links FIXED: 'Img.yt' linksDynamics AX Development tools: Version 1.0.0: Alpha release of the package. I am just combining greate community tools into a package. I have not go through testing every function of the tools. However, feel free to point out if you found any bugs!Asp.Net MVC-4,Entity Framework and JQGrid Demo with Todo List WebApplication: Asp.Net MVC-4,Entity Framework and JQGrid Demo: Asp.Net MVC-4,Entity Framework and JQGrid Demo with simple Todo List WebApplication, Overview TodoList is a simple web application to create, store and modify Todo tasks to be maintained by the users, which comprises of following fields to the user (Task Name, Task Description, Severity, Target Date, Task Status). TodoList web application is created using MVC - 4 architecture, code-first Entity Framework (ORM) and Jqgrid for displaying the data.Waterfox: Waterfox 31.0 Portable: New features in Waterfox 31.0: Added support for Unicode 7.0 Experimental support for WebCL New features in Firefox 31.0:New Add the search field to the new tab page Support of Prefer:Safe http header for parental control mozilla::pkix as default certificate verifier Block malware from downloaded files Block malware from downloaded files audio/video .ogg and .pdf files handled by Firefox if no application specified Changed Removal of the CAPS infrastructure for specifying site-sp...SuperSocket, an extensible socket server framework: SuperSocket 1.6.3: The changes below are included in this release: fixed an exception when collect a server's status but it has been stopped fixed a bug that can cause an exception in case of sending data when the connection dropped already fixed the log4net missing issue for a QuickStart project fixed a warning in a QuickStart projectYnote Classic: Ynote Classic 2.8.5 Beta: Several Changes - Multiple Carets and Multiple Selections - Improved Startup Time - Improved Syntax Highlighting - Search Improvements - Shell Command - Improved StabilityHead First C#: The Quest: The Quest: Stable release of "The Quest" game ( Lab 2 from Head First C#, 3rd edition)TCP/IP Adapter BizTalk 2013: TCPIP Adapter for BizTalk 2013 - Version 1.0: Version 1.0 This is an updated version of the BizTalk 2010 TCP/IP adapter. References have been updated and a new setup (ISLE) has been used. Follow the installation instructions below to install the adapter. Still want to automate step 4, but haven't got to it yet. Installation instructions Make sure to close the BizTalk Administration Console. Just to make sure everything gets refreshed after installation. Download and install the setup. The setup makes sure the adapter will be regis...gicon: gicon HTTP service v1.0.0: core: 1.0.0.26592 service: 1.0.0.27190 Github: http://rynnwang.github.io/gicon/ Github.io: http://rynnwang.github.io/gicon/ Codeplex: http://gicon.codeplex.com .NET required: 2.0 or above. Installation notes: 1. You need to run intallutil command to install ifunction.GuidIconHttpService.exe file as Windows Service 2. You need to update ifunction.GuidIconHttpService.exe.config file in the folder to set correct HTTP URI prefixes. In release zip by default, it is set as http://localhost:20000...TEBookConverter: 1.2: Fixed: Could not start convertion in some cases Fixed: Progress show during convertion was truncated Fixed: Stopping convertion didn't reset program titlenewmail_OutlookCOM: newmail_OutlookCOM: First Stable ReleaseSharePoint - Data View Web Part Documenter: Data View Web Part Documenter 1.0: .NET Framework 4 Client Profile required for this to run on your PC. Please see the documentation for running the tool.LOL zmena skinu klienta: LOL jednoduchý menic skinu klienta: Jednoduchý prográmek, který ušetrí cas pri zmene klienta. Nemusí se proklikáva18541855 adresáru :)SSRS Plus+: Latest - SSRS Plus Application and Source Code: This release contains the Beta version with significant changes in comparison to the old release which I am keeping for legacy reasons. At some point a changeover will be made once it has been confirmed that my branch is stable and Mr Bagwan is in agreement also.CS-Script Source: Release v3.8.4: CSScript.Evaluator is migrated to Mono v3.3.0 Added aggregating //css_ignore_ns from the imported scripts cs-script.7z - CS-Script Suite (binaries, documentation, samples) cs-script.ExtensionPack.7z - CS-Script Extension Pack (additional binaries and samples) cs-scriptDocs.7z - CS-Script DocumentationDotSpatial: DotSpatial 1.7: DotSpatial.Full - includes all DotSpatial libraries, extensions and DemoMap application DotSpatial.Core - includes only DotSpatial core libraries Entire list of changes see in the issue tracker. Main changes: Improved common stability, optimized memory and speed when loading and rendering shapefiles, fixed some memory leaks in rasters and shape layers. Simplified plugin infrastructure. Now there are predefined implementations for all required components (IStatusControl, IDockManager, IHead...New ProjectsBrilliantORM: ????ORM??，??SQL?????????。???????????。Crafter: ?????? ??? ????Dotnetnuke xblog // Blog, Article, Events, Documents: xBlog is a blog program based on DNN, it has powerful functions and unique design style. In addition to article management function which common blog module hasIn Plain Sight: Embedding plain text into an image so one can hide the text "In Plain Sight". A cursory view into the world of Steganography.JS Koans Visual Studio Friendly Version: A Version of JS koans loaded into Visual StudioMy Troop First: just adding to the siteOFX Parser: Biblioteca desenvolvida em C# que traduz arquivos OFX e gera a instância de uma classe que representa o arquivo. Um exemplo de uso está disponível, assim como aOrchard Custom Code module: This module adds a very simple tool to add custom code in front-end pages head and foot.SPB Export to KeePass Import Conversion: A simple script to convert the .xml-file by konste's "SPB Wallet Export" (https://spbwalletexport.codeplex.com/) into an import format accepted by KeePass 2The unTroublemaker: The unTroublemaker is a troubleshooter program that helps your project quickly find and fix missing dependency issues using simple XML-based specifications.

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• Checking preconditions or not

  - by Robert Dailey

  I've been wanting to find a solid answer to the question of whether or not to have runtime checks to validate input for the purposes of ensuring a client has stuck to their end of the agreement in design by contract. For example, consider a simple class constructor: class Foo { public: Foo( BarHandle bar ) { FooHandle handle = GetFooHandle( bar ); if( handle == NULL ) { throw std::exception( "invalid FooHandle" ); } } }; I would argue in this case that a user should not attempt to construct a Foo without a valid BarHandle. It doesn't seem right to verify that bar is valid inside of Foo's constructor. If I simply document that Foo's constructor requires a valid BarHandle, isn't that enough? Is this a proper way to enforce my precondition in design by contract? So far, everything I've read has mixed opinions on this. It seems like 50% of people would say to verify that bar is valid, the other 50% would say that I shouldn't do it, for example consider a case where the user verifies their BarHandle is correct, but a second (and unnecessary) check is also being done inside of Foo's constructor.

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• What reasons are there to reduce the max-age of a logo to just 8 days? [closed]

  - by callum

  Most websites set max-age=31536000 (1 year) on the Cache-control headers of static assets such as logo images. Examples: YouTube Yahoo Twitter BBC But there is a notable exception: Google's logo has max-age=691200 (8 days). I've checked the headers on the Google logo in the past, and it definitely used to be 1 year. (Also, it used to be part of a sprite, and now it is a standalone logo image, but that's probably another question...) What could be valid technical reasons why they would want to reduce its cache lifetime to just 8 days? Google's homepage is one of the most carefully optimised pages in the world, so I imagine there's a good reason. Edit: Please make sure you understand these points before answering: Nobody uses short max-age lifetimes to allow modifying a static asset in future. When you modify it, you just serve it at a different URL. So no, it's nothing to do with Google doodles. Think about it: even if Google didn't understand this basic trick of HTTP, 8 days still wouldn't be appropriate, as only those users who don't have the original logo cached would see the doodle on doodle-day – and then that group of users would go on seeing the doodle for the following 8 days after Google changed it back :) Web servers do not worry about "filling up" the caches of clients (or proxies). The client manages this by itself – when it hits its own storage limit, it just starts dropping the lowest priority items to make space for new items. The priority score is based on the question "How likely am I to benefit from having cached this URL?", which is nothing to do with what max-age value the server sent when the URL was originally requested; it's a heuristic based on the "frecency" of requests for that URL. The max-age simply lets the server set a cut-off point – the time at which the client is supposed to discard the item regardless of how often it's being re-used. It would be very nice and trusting of a downstream client/proxy to rely on all origin servers "holding back" from filling up their caches, but I don't think we live in that world ;)

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• I don't understand the definition of side effects

  - by Chris Okyen

  I don't understand the wikipedia article on Side Effects: In computer science, a function or expression is said to have a side effect if, in addition to returning a value, it also 1.) Modifies some state or 2.) Has an observable interaction with calling functions or the outside world. I know an example of the first thing that causes a function or expression to have side effects - modifying a state Function and Expression modifying a state : 1.) foo(int X) { return x = x % x; } a = a + 1; What does 2.) - Has an observable interaction with calling functions or the outside world," mean? - Please give an example. The article continues on to say, "For example, a function might modify a global or static variable, modify one of its arguments, raise an exception, write data to a display or file, read data, or call other side-effecting functions...." Are all these examples, examples of 1.) - Modifiying some state , or are they also part of 2.) - Has an observable interaction with calling functions or the outside world?

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• Stylecop 4.7.37.0 has been released

  - by TATWORTH

  Stylecop  4.7.37.0 has been released at http://stylecop.codeplex.com/releases/view/79972The release notes follow:Add docs for new SA1650 spelling rule.Fix for 7395. Dont remove parenthesis around await expressions.Insert a returns element into docs within a see element.Update our tools folder StyleCop dll'sfix for 7392. Insert generic type docs for return types correctly.Fix for 7393. Allow documentation elements with attributes to end the string and still be valid.Make sure the MSBuild Task logs the warning id and type of exception. Unless the description field holds all this info VS cannot show the text in the Error List.Load custom dictionaries for multiple cultures. For a culture like en-GB; we load CustomDictionary.xml, then look for CustomDictionary.en-GB.xml and then CustomDictionary.en.xmlUpdate standard shipping dictionaries.Element documentation spelling fixes.Reduce the standard dictionaryUpdate our own devbuild StyleCop checks.Don't check spelling of xml documentation attributes are anything inside  <c> or <code> elements.Update StylingStyling update.Add timestamps for all the dependant files into the StyleCopResults.cache. Add a FileSystemWatcher to all custom dictionary files.Write out the full violation into the StyleCopResults.cache.Change a rules description text.Styling fixes.Styling fixes.NEW RULE: Check Spelling Of Element Documetation. Fix over 2000 spelling errors in our source code. Update the VS addin to show the rule violation in more detail. Add spelling checker to the deployment.Set our own Culture to en-USDocumentation spelling fixes.First draft of the documentation spelling checker.Fix for 7325. Don't throw 1126 in goto statements.Fix for 7090. Add TargetsDir to registry during install.Fix for 7060. Sort usings after moving them inside namespace.Fix FxCop issues.Fix for 7389. Detect CpuCount on Unix/MACFix for 6788. Allow opening curly brackets for scope. Added new tests.Updating constants.Fix for 7167. Show version number of StyleCop in VS Help window.Only output StyleCop excluded files if there are any.

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• Using local repository with vmbuilder and https

  - by Onitlikesonic

  I seem to be having problems using vmbuilder with a local https mirror "--mirror=https:///archive.ubuntu.com/ubuntu/" as shown below: Process (['/usr/sbin/debootstrap', '--arch=amd64', 'precise', '/tmp/tmpYc0cOktmpfs', '<my_internal_server>/ubuntu/']) returned 1. stdout: I: Retrieving Release E: Failed getting release file <my_internal_server>/ubuntu/dists/precise/Release , stderr: 2012-10-18 10:36:36,429 INFO : Unmounting tmpfs from /tmp/tmpYc0cOktmpfs Traceback (most recent call last): File "/usr/bin/vmbuilder", line 24, in <module> cli.main() File "/usr/lib/python2.7/dist-packages/VMBuilder/contrib/cli.py", line 216, in main distro.build_chroot() File "/usr/lib/python2.7/dist-packages/VMBuilder/distro.py", line 83, in build_chroot self.call_hooks('bootstrap') File "/usr/lib/python2.7/dist-packages/VMBuilder/distro.py", line 67, in call_hooks call_hooks(self, *args, **kwargs) File "/usr/lib/python2.7/dist-packages/VMBuilder/util.py", line 165, in call_hooks getattr(context, func, log_no_such_method)(*args, **kwargs) File "/usr/lib/python2.7/dist-packages/VMBuilder/plugins/ubuntu/distro.py", line 136, in bootstrap self.suite.debootstrap() File "/usr/lib/python2.7/dist-packages/VMBuilder/plugins/ubuntu/dapper.py", line 269, in debootstrap run_cmd(*cmd, **kwargs) File "/usr/lib/python2.7/dist-packages/VMBuilder/util.py", line 120, in run_cmd raise VMBuilderException, "Process (%s) returned %d. stdout: %s, stderr: %s" % (args.__repr__(), status, mystdout.buf, mystderr.buf) VMBuilder.exception.VMBuilderException: Process (['/usr/sbin/debootstrap', '--arch=amd64', 'precise', '/tmp/tmpYc0cOktmpfs', '<my_internal_server>/ubuntu/']) returned 1. stdout: I: Retrieving Release E: Failed getting release file <my_internal_server>/ubuntu/dists/precise/Release , stderr: I've checked that the files are in the correct place and i'm able to setup this using http instead of https. However this server will be providing https access only to the repos, the http is only temporarily open. This might be due to the certificate not being valid on the https (since it's self signed) or due to the fact that vmbuilder doesn't support https? In either case how can i get this to work? (If it's the case of the invalid certificate I don't mind ignoring any checks)

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• "Viral" license that only blocks legal actions of user and developer against each other

  - by Lukasz Zaroda

  I was thinking a lot about software licensing lately, because I would like to do some coding. I'm not an expert in all those licenses, so I came up with my own idea, and before I will put in on paper, I would like to make sure that I didn't reinvent a wheel, so maybe I would be able to use something that exists. Main idea behind my license is to guarantee freedom of use the software, but not "freedom to" (positive) (e.g. freedom to having source code), but "freedom from" (negative) (strictly from legal actions against you). It would be "viral" copyleft license. You would be able to without fear do everything you want with the software (and binaries e.g. reverse engineering), as long as You will include information about author and/or authors, and all derivative works will be distributed with the same license. I'm not interested in anything that would restrict a freedom of company to do something like "tivoization". I'm just trying to accomplish something that would block any legal actions of user and developer, targeted against each other, with the exception of basic attribution. Does exist something like that?

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• WCF - Automatically create ServiceHost for multiple services

  - by Rajesh Pillai

  WCF - Automatically create ServiceHost for multiple services Welcome back readers!  This blog post is about a small tip that may make working with WCF servicehost a bit easier, if you have lots of services and you need to quickly host them for testing. Recently I was encountered a situation where we were faced to create multiple service host quickly for testing.  Here is the code snippet which is pretty self explanatory.  You can put this code in your service host which in this case is  a console application. class Program   {       static void Main(string[] args)       { // Stores all hosts           List<ServiceHost> hosts = new List<ServiceHost>();           try           { // Get the services element from the serviceModel element in the config file               var section = ConfigurationManager.GetSection("system.serviceModel/services") as ServicesSection;               if (section != null)               {                   foreach (ServiceElement element in section.Services)                   { // NOTE : If the assembly is in another namespace, provide a fully qualified name here in the form // <typename, namespace> // For e.g. Business.Services.CustomerService, Business.Services                       var serviceType = Type.GetType(element.Name); // Get the typeName                        var host = new ServiceHost(serviceType);                       hosts.Add(host); // Add to the host collection                       host.Open(); // Open the host                   }               }               Console.ReadLine();           }           catch (Exception e)           {               Console.WriteLine(e.Message);               Console.ReadLine();           }           finally           {               foreach (ServiceHost host in hosts)               {                   if (host.State == CommunicationState.Opened)                   {                       host.Close();                   }                   else                   {                       host.Abort();                   }               }           }       }   } I hope you find this useful.  You can make this as a windows service if required.

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• CodePlex Daily Summary for Sunday, August 26, 2012

  CodePlex Daily Summary for Sunday, August 26, 2012Popular ReleasesPhysics Helper XAML: Physics Helper XAML 1.1.0.0: This release supports creation of 2D Physics apps for Windows 8 RTM, Windows Phone 7.1 development, and Silverlight 5. It includes source code and samples in three separate solutions.TouchInjector: TouchInjector 1.0: Version 1.0BlackJumboDog: Ver5.7.1: 2012.08.25 Ver5.7.1 (1)?????·?????LING?????????????? (2)SMTP???（????）????、?????\?????????????????????Peulot Heshbon: Peulot Heshbon version 3.0.0: Available quizzes:Plus for Natural, Real and fragments Minus for Natural, Real and fragments Multiplication for Natural, Real and fragments Divide for Natural, Real and fragments Random for Natural, Real and fragments Compare 2 percentages Compare 2 fragments (Just for easy difficulty) Check if a number can be divided with another number exactly. Available Languages:Hebrew English Russian What's NewAdded new quiz: Compare 2 fragments. It is available only if you are in Eas...Visual Studio Team Foundation Server Branching and Merging Guide: v2 - Visual Studio 2012: Welcome to the Branching and Merging Guide Quality-Bar Details Documentation has been reviewed by Visual Studio ALM Rangers Documentation has been through an independent technical review Documentation has been reviewed by the quality and recording team All critical bugs have been resolved Known Issues / Bugs Spelling, grammar and content revisions are in progress. Hotfix will be published.Microsoft Ajax Minifier: Microsoft Ajax Minifier 4.62: Fix for issue #18525 - escaped characters in CSS identifiers get double-escaped if the character immediately after the backslash is not normally allowed in an identifier. fixed symbol problem with nuget package. 4.62 should have nuget symbols available again.nopCommerce. Open source shopping cart (ASP.NET MVC): nopcommerce 2.65: As some of you may know we were planning to release version 2.70 much later (the end of September). But today we have to release this intermediate version (2.65). It fixes a critical issue caused by a third-party assembly when running nopCommerce on a server with .NET 4.5 installed. No major features have been introduced with this release as our development efforts were focused on further enhancements and fixing bugs. To see the full list of fixes and changes please visit the release notes p...MyRouter (Virtual WiFi Router): MyRouter 1.2.9: . Fix: Some missing changes for fixing the window subclassing crash. · Fix: fixed bug when Run MyRouter at the first Time. · Fix: Log File · Fix: improve performance speed application · fix: solve some Exception.eel Browser: eel 1.1.0.41 beta: Improved UI New features Bug fixesDynamics CRM 2011 Dummy Entity: First Release: This has been tested on CRM 2011 RU8 On-Premise IFD. Known Issue: The Test Dummy CRM page load event may throw an exception loading the first time as the iframe may not have finished loading. I have not been able to get the iframe OnReadyStateChange event to fire. But it is only a sample anyway. The zip file contains: Dummy Entity Visual studio solution. Test Dummy Visual Studio solution. Dummy Entity CRM Solution Test Dummy CRM Solution Installation: Unzip and import the CRM Solutions...Private cloud DMS: Essential server-client full package: Requirements: - SQL server >= 2008 (minimal Express - for Essential recommended) - .NET 4.0 (Server) - .NET 4.0 Client profile (Client) This version allow: - full file system functionality Restrictions: - Maximum 2 parallel users - No share spaces - No hosted business groups - No digital sign functionality - No ActiveDirectory connector - No Performance cache - No workflow - No messagingJavaScript Prototype Extensions: Release 1.1.0.0: Release 1.1.0.0 Add prototype extension for object. Add prototype extension for array.Glyphx: Version 1.2: This release includes the SdlDotNet.dll dependency in the setup, which you will need.TFS Project Test Migrator: TestPlanMigration v1.0.0: Release 1.0.0 This first version do not create the test cases in the target project because the goal was to restore a Test Plan + Test Suite hierarchy after a manual user deletion without restoring all the Project Collection Database. As I discovered, deleting a Test Plan will do the following : - Delete all TestSuiteEntry (the link between a Test Suite node and a Test Case) - Delete all TestSuite (the nodes in the test hierarchy), including root TestSuite - Delete the TestPlan Test c...ERPStore eCommerce FrontOffice: ERPStore.Core V4.0.0.2 MVC4 RTM: ERPStore.Core V4.0.0.2 MVC4 RTM (Code Source)ZXing.Net: ZXing.Net 0.8.0.0: sync with rev. 2393 of the java version improved API, direct support for multiple barcode decoding, wrapper for barcode generating many other improvements and fixes encoder and decoder command line clients demo client for emguCV dev documentation startedScintillaNET: ScintillaNET 2.5.1: This release has been built from the 2.5 branch. Issues closed: Issue # Title 32524 32524 32550 32550 32552 32552 25148 25148 32449 32449 32551 32551 32711 32711 MFCMAPI: August 2012 Release: Build: 15.0.0.1035 Full release notes at SGriffin's blog. If you just want to run the MFCMAPI or MrMAPI, get the executables. If you want to debug them, get the symbol files and the source. The 64 bit builds will only work on a machine with Outlook 2010 64 bit installed. All other machines should use the 32 bit builds, regardless of the operating system. Facebook BadgeDocument.Editor: 2013.2: Whats new for Document.Editor 2013.2: New save as Html document Improved Traslate support Minor Bug Fix's, improvements and speed upsPulse: Pulse Beta 5: Whats new in this release? Well to start with we now have Wallbase.cc Authentication! so you can access favorites or NSFW. This version requires .NET 4.0, you probably already have it, but if you don't it's a free and easy download from Microsoft. Pulse can bet set to start on Windows startup now too. The Wallpaper setter has settings now, so you can change the background color of the desktop and the Picture Position (Tile/Center/Fill/etc...) I've switched to Windows Forms instead of WPF...New Projects508 Compliance Validator: This tool checks aspx and ascx pages against 508 Accessibilty guidelines and also allows you to add your own rules.BF for WP: BF for WP is a visual Brainfuck interpter for Windows Phone.Climate Control: App lets you vote on whether you're too hot or too cold so the dummy next to the air con controls can adjust the thermostat.Custom Captcha Plugin for Kooboo CMS for adding content or sending feedback: Custom Captcha Plugin for Kooboo CMS for adding content or sending feedbackGalleryDownloader: This project takes aim on downloading free photogalleries through the Internet. Highly Maintainable Web Services: The Highly Maintainable Web Services project is a reference architecture application for .NET that demonstrates how to build highly maintainable web services.Its.Validation: A C# DSL for writing rules in a composable, functional style.Kaku by wifi: The projects purpose: Make your phone a part of your house hold by being able to control certail elektric devices with your phone such as, light, electric curtaLogin with Google in ASP.Net MVC3 & Get data from Google User: ASP.Net developer can use this code: asp.net mvc3 web project which contains login with google and pull data from user's google accountMabiCommerce: MabiCommerce is an advanced Commerce Calculator for the MMORPG Mabinogi.Mapture the FLAG: A location based game for wp7mn: sumSharePoint 2010: SharePoint 2010 utilitiesSHIORI.NET: ???SHIORI????????????????????Temp and Stress: Tieni sotto controllo le temperature della tua CPU e effettua Stress Test e Benchmark!VisiblityControl – An Alternative to Converters: A templated content control hosting to remove the pain of using the BooleanToVisibilityConverter. The property IsTrue determines what is shown.Whatsnexx Integration for Orchard CMS: Orchard Whatsnexx makes it easier for Orchard users to send an event to the Whatsnexx Ticket Bus service API, of the Whatsnexx GatewayWINRT \ Metro Store \ open marketing solution: This project is aimed at creating a public shopping cart, that is available to all windows 8 users free. products are screened added by administrators

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• Alternatives to Pessimistic Locking in Cluster Applications

  - by amphibient

  I am researching alternatives to database-level pessimistic locking to achieve transaction isolation in a cluster of Java applications going against the same database. Synchronizing concurrent access in the application tier is clearly not a solution in the present configuration because the same database transaction can be invoked from multiple JVMs concurrently. Currently, we are subject to occasional race conditions which, due to the optimistic locking we have in place via Hibernate, cause a StaleObjectStateException exception and data loss. I have a moderately large transaction within the scope of my refactoring project. Let's describe it as updating one top-level table row and then making various related inserts and/or updates to several of its child entities. I would like to insure exclusive access to the top-level table row and all of the children to be affected but I would like to stay away from pessimistic locking at the database level for performance reasons mostly. We use Hibernate for ORM. Does it make sense to start a single (perhaps synchronous) message queue application into which this method could be moved to insure synchronized access as opposed to each cluster node using its own, which is a clear race condition hazard? I am mentioning this approach even though I am not confident in it because both the top-level table row and its children could also be updated from other system calls, not just the mentioned transaction. So I am seeking to design a solution where the top-level table row and its children will all somehow be pseudo-locked (exclusive transaction isolation) but at the application and not the database level. I am open to ideas and suggestions, I understand this is not a very cut and dried challenge.

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• How can I improve my isometric tile-picking algorithm?

  - by Cypher

  I've spent the last few days researching isometric tile-picking algorithms (converting screen-coordinates to tile-coordinates), and have obviously found a lot of the math beyond my grasp. I have come fairly close and what I have is workable, but I would like to improve on this algorithm as it's a little off and seems to pick down and to the right of the mouse pointer. I've uploaded a video to help visualize the current implementation: http://youtu.be/EqwWcq1zuaM My isometric rendering algorithm is based on what is found at this stackoverflow question's answer, with the exception that my x and y axis' are inverted (x increased down-right, while y increased up-right). Here is where I am converting from screen to tiles: // these next few lines convert the mouse pointer position from screen // coordinates to tile-grid coordinates. cameraOffset captures the current // mouse location and takes into consideration the camera's position on screen. System.Drawing.Point cameraOffset = new System.Drawing.Point( 0, 0 ); cameraOffset.X = mouseLocation.X + (int)camera.Left; cameraOffset.Y = ( mouseLocation.Y + (int)camera.Top ); // the camera-aware mouse coordinates are then further converted in an attempt // to select only the "tile" portion of the grid tiles, instead of the entire // rectangle. this algorithm gets close, but could use improvement. mouseTileLocation.X = ( cameraOffset.X + 2 * cameraOffset.Y ) / Global.TileWidth; mouseTileLocation.Y = -( ( 2 * cameraOffset.Y - cameraOffset.X ) / Global.TileWidth ); Things to make note of: mouseLocation is a System.Drawing.Point that represents the screen coordinates of the mouse pointer. cameraOffset is the screen position of the mouse pointer that includes the position of the game camera. mouseTileLocation is a System.Drawing.Point that is supposed to represent the tile coordinates of the mouse pointer. If you check out the above link to youtube, you'll notice that the picking algorithm is off a bit. How can I improve on this?

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• CA For A Large Intranet

  - by Tim Post

  I'm managing what has become a very large intranet (over 100 different hosts / services) and will be stepping down from my role in the near future. I want to make things easy for the next victim person who takes my place. All hosts are secured via SSL. This includes various portals, wikis, data entry systems, HR systems and other sensitive things. We're using self signed certificates which worked o.k. in the past, but are now problematic because: Browsers make it harder for users to understand exactly what is going on when a self signed certificate is encountered, much less accept them. Putting up a new host means 100 phone calls asking what "Add an exception" means What we were doing is just importing the self signed certs when we set up a new workstation. This was fine when we only had a dozen to deal with, but now its just overwhelming. Our I.T. Department has classified this as ya all's problem, all we get from them is support for switch and router configurations. Beyond the user having connectivity, everything else is up to the intranet administrators. We have a mix of Ubuntu and Windows workstations. We'd like to set up our own self signed CA root, which can sign certificates for each host that we deploy on the intranet. Client browsers would of course be told to trust our CA. My question is, would this be dangerous and would we be better off going with intermediate certificates from someone like Verisign? Either way, I still have to import the root for the intermediate CA, so I really don't see what the difference is? Other than charging us money, what would Verisign be doing that we could not, beyond protecting the root CA cert so it can't be used to make forgeries?

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• CodePlex Daily Summary for Sunday, May 18, 2014

  CodePlex Daily Summary for Sunday, May 18, 2014Popular ReleasesClosedXML - The easy way to OpenXML: ClosedXML 0.70.0: A lot of fixes. See history.TBox - tool to make developer's life easier.: TBox 1.29: Bug fixing. Add LocalizationTool pluginYAXLib: Yet Another XML Serialization Library for the .NET Framework: YAXLib 2.13: Fixed a bug and added unit tests related to serializing path like aliases with one letter (e.g., './B'). Thanks go to CodeProject user B.O.B. for reporting this bug. Added `Bin/*.dll.mdb` to `.gitignore`. Fixed the issue with Indexer properties. Indexers must not be serialized/deserialized. YAXLib will ignore delegate (callback/function pointer) properties, so that the exception upon serializing them is prevented. Significant improve in cycling object reference detection Self Referr...SFDL.NET: SFDL.NET (2.2.9.2): Changelog: Neues Icon Xup.in CnL Plugin BugfixSEToolbox: SEToolbox 01.030.008 Release 1: Fixed cube editor failing to apply color to cubes. Added to cube editor, replace cube dialog, and Build Percent dialog. Corrected for hidden asteroid ore, allowing rare ore to show when importing an asteroid, or converting a 3d model to an asteroid (still appears to be limitations on rare ore in small asteroids). Allowed ore selection to Asteroid file import. (Can copy/import and convert existing asteroid to another ore). Added progress bars to common long running operations. Fixed ...Better Robocopy GUI: Command Line GUI for Robocopy: Better Robocopy GUI had become the primary plugin in Command Line GUI built on .NET 4Mini SQL Query: Mini SQL Query (1.0.71.456): Minor fixes and template corrections.Visual Studio Settings Switcher: Settings Switcher 1.1: Settings Switcher is compatible with Visual Studio 2012 and Visual Studio 2013. Express editions are not supported. NewFull support for Visual Studio 2013. Solution Settings Files (see Documentation for details.) Bug fixes and general usability improvements. There are two ways to install Settings Switcher: DOWNLOAD FROM CODEPLEXDownload the installer (.vsix) from the link above. Close all instances of Visual Studio. Double-click the .vsix file to install Settings Switcher. DOWNLOA...SharePoint Online Automation Cmdlets: Apps, Solutions and Permissions: Solutions can now be activated/deactivated/updated :-) See documentation for examples. Added Add-SPOApp and Install-SPOApp for uploading and activating apps on non-developer site collections. Also adding groups and permission levels has been included. Install Instructions Install the SharePoint Online Client components. Download and run the MSI file from the downloads section.TFS Planning and Disaster Recovery Avoidance Guide: v1.4.BETA - TFS, DR and Azure IaaS Planning Guides: Welcome to the TFS Planning and DR Avoidance Guidance What is new? A new crisper, more compact style, which is easier to consume on multiple devices without sacrificing any content. Also included are the new TFS on Azure IaaS guide and supplementary guides. Note Capacity planning workbook and posters are included in the Everything Zip package. Quality-Bar Detail Documentation has been reviewed by Visual Studio ALM Rangers Documentation has been through an independent technical review ...CRM Web API Lead Capture Example: CRM Web API Lead Capture Example: Sample Visual Studio 2013 project that provides an example of how you could use Web API and Microsoft Azure (could be deployed anywhere) to capture simple HTML form data into Dynamics CRM without directly having to integrate a .NET component.MB Tools: MDT Monitor Tool v1.4: This tool is used to connect to an MDT 2013 Monitor Webservice. The purpose is to provide an alternative to the MDT Deployment Workbench. Update: New in v1.4: Fixed bug where Dart Remote Viewer didnt work Option to show client local time instead of UTC, edit config.xml to enable/disable New in v1.2: Fixed Dart Remote Viewer not connection to full ip Issue: 1222 New in v1.1: Added timers for autorefresh of webservice info Added some better errorchecking and cleaned up the code a bit ...WinAudit: WinAudit Freeware v3.0: WinAudit.exe v3.0 MD5: 88750CCF49FF7418199B2645755830FA Known Issues: 1. Report creation can be very slow when right-to-left (Hebrew) characters are present. 2. Emsisoft Anti-Malware may stop and/or quarantine WinAudit. This happens when WinAudit attempts to obtain a list if running programmes. You will need to set an exception rule in Emsisoft to allow WinAudit to run.TerraMap (Terraria World Map Viewer): TerraMap 1.0.4: Added support for the new Terraria v1.2.4 update. New items, walls, and tiles Fixed Issue 35206: Hightlight/Find doesn't work for Demon Altars Fixed finding Demon Hearts/Shadow Orbs Added ability to find Enchanted Swords (in the stone) and Water Bolt books Fixed installer not uninstalling older versions The setup file will make sure .NET 4 is installed, install TerraMap, create desktop and start menu shortcuts, add a .wld file association, and launch TerraMap. If you prefer the zip ...Amqp.Net Lite: 0.1: This is the Alpha-quality release of the AMQP.Net Lite library.TSS.MSR: TSS.MSR v1.1: MSR's TPM2.0 access libraries and sample applications.WPF Localization Extension: v2.2.1: Issue #9277 Issue #9292 Issue #9311 Issue #9312 Issue #9313 Issue #9314Hime Parser Generator: Hime Parser Generator v1.0.0: This releases the stable version of the Hime parser generator. This release contains many bugfixes and performance enhancement. It also provides a clean API for the manipulation and debugging of context-free grammars.CtrlAltStudio Viewer: CtrlAltStudio Viewer 1.2.1.41167 Release: This release of the CtrlAltStudio Viewer includes the following significant features: Oculus Rift support. Stereoscopic 3D display support. Variable walking / flying speed. Xbox 360 Controller support. Kinect for Windows support. Based on Firestorm viewer 4.6.5 codebase. For more details, see the release notes linked to below. Release notes: http://ctrlaltstudio.com/viewer/release-notes/1-2-1-41167-release Support info: http://ctrlaltstudio.com/viewer/support Privacy policy: http:/...ExtJS based ASP.NET Controls: FineUI v4.0.6: FineUI（???） ?? ExtJS ??? ASP.NET ??? FineUI??? ?? No JavaScript，No CSS，No UpdatePanel，No ViewState，No WebServices ??????? ?????? IE 8.0+、Chrome、Firefox、Opera、Safari ???? Apache License v2.0 ?：ExtJS ?? GPL v3 ?????(http://www.sencha.com/license) ???? ??：http://fineui.com/ ??：http://fineui.com/bbs/ ??：http://fineui.com/demo/ ??：http://fineui.com/doc/ ??：http://fineui.codeplex.com/ FineUI ???? ExtJS ????????，???? ExtJS ?，?????： 1. ????? FineUI ? ExtJS ? http://fineui.com/bbs/forum.ph...New ProjectsCheburashka: Static Code Analysis Rule-set for Visual Studio SSDT projectsFree Workflow: Free Workflow Project aim to use Microsoft Workflow Manager as hosting environment to Business Process Workflow , it has its own database to manage users tasks.Jenkins Tray: Jenkins tray real time notifyMoneyManagement: ?? WCF ??????????????WCF?????。??????????????????????????????。MoonSharp: An interpreter for a very close cousin of the Lua language, written in C# for the .NET, Mono, Xamarin and Unity3D platforms.OITPMS_MVC: Online Issue Tracking and Project Management System This project was created for Bug tracking and issues that comes while creating project or on going projectSpiral Chrome: Spiral Chrome, the quick, simple, and user friendly method of phishing. Throttling Suite for Web API: The Throttling Suite provides throttling control capabilities to the .NET Web API applications. It is highly customizable product, yet simple to use.TP2 .NET: Trabajo practico 2 para la clase de .net??????-??????【??】??????????: ?????????????????,???????????????。???????????,??????:????、????、???????！ ????-????【??】????????: ????????????????,???????????,??????????????,??????????，??????????????！?????-?????【??】?????????: ??????????????????,?????????????,????,?????????,?????????????,?????,?????! ??????-??????【??】??????????: ??????????????????、????,??100%????,??????,????????????,???????????! ????-????【??】????????: ?????????????????????:????、????、??????????????,????????。????????! ?????-?????【??】?????????: ???????????????????,??????????,????????、????,??????????,??????????。 ?????-?????【??】?????????: ???????,??????:?????,?????,??????,??????????,????????。????????! ??????-??????【??】??????????: ?????????????????,??????????、??????,??????????、????、????、???????。 ??????-??????【??】??????????: ?????????????、??????????????????,????????,?????,??????,????,????,????! ????-????【??】????????: ???????????????????????????、????、????、???????????,????,????! ?????-?????【??】?????????: ?????????????????????,???????????????,????????????????????! ?????-?????【??】?????????: ?????????????????????,???????????????,???????,?????,?????,????? !!! ??????-??????【??】??????????: ????????????????????,????????:??、??、???,?????????????????????! ??????-??????【??】??????????: ??????????????????????,????“???????,???????”?????,????????????！ ??????-??????【??】??????????: ???????????,????,????,??????,????“????、????、????、????”????????,??????. ??????-??????【??】??????????: ?????????????,?????,???????????,???????,????,????,????,?????。 ?????-?????【??】?????????: ????????????,?????,???????????,???????,????,????,????,?????。 ??????-??????【??】??????????: ?????????????????????????????,??????????,????,????,?????????、??????,??????。 ????-????【??】????????: ????????????????????????,????,????,??????????。???????????????,??,??,??????????,??????... ?????-?????【??】?????????: ???????????????,?????????????? ??。????????、????、????、?????????? ???????。 ??????-??????【??】??????????: ????????????、???、??、??????????????????????????????,????????????????! ????-????【??】????????: ??????????????6?,???????????????????????????,??????????????,?????????！ ?????-?????【??】?????????: ???????????????8?，????????,????????,??????????,?????,????? ,????????!

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• What is the proper response to lousy error message?

  - by William Pursell

  I've just come across (for the 47 millionth time) some code that looks like this: except IOError, e: print "Problems reading file: %s." % filename sys.exit( 1 ) My first reaction is very visceral: the person who coded this is a complete idiot. How hard is it to print error messages to stderr and to include the system error message in the string? I haven't used python in years, and it took me all of 4 minutes to track down the documentation to figure out how to get the error message from the exception object e and the syntax for printing to stderr. My "complete idiot" reaction was slightly lessened since at least a non-zero value is passed to sys.exit, but I still find this code offensive. My prime thought is that the developer who wrote this is a complete novice for whom I have zero respect. Am I over-reacting? Surely there are excuses for all sorts of bad coding practices, but is there anything that can possibly excuse this sort of $#|t? I guess there are two question here: one is a duplicate of What are developer's problems with helpful error messages?, and the other is "am I over-reacting, or is it valid to conclude that the author of the above code is a novice?"

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• What should a domain object's validation cover?

  - by MarcoR88

  I'm trying to figure out how to do validation of domain objects that need external resources, such as data mappers/dao Firstly here's my code class User { const INVALID_ID = 1; const INVALID_NAME = 2; const INVALID_EMAIL = 4; int getID(); void setID(Int i); string getName(); void setName(String s); string getEmail(); void setEmail(String s); int getErrorsForInsert(); // returns a bitmask for INVALID_* constants int getErrorsForUpdate(); } My worries are about the uniqueness of the email, checking it would require the storage layer. Reading others' code seems that two solutions are equally accepted: both perform the unique validation in data mapper but some set an error state to the DO user.addError(User.INVALID_EMAIL) while others prefer to throw a totally different type of exception that covers only persistence, like: UserStorageException { const INVALID_EMAIL = 1; const INVALID_CITY = 2; } What are the pros and cons of these solutions?

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• I've been told that Exceptions should only be used in exceptional cases. How do I know if my case is exceptional?

  - by tieTYT

  My specific case here is that the user can pass in a string into the application, the application parses it and assigns it to structured objects. Sometimes the user may type in something invalid. For example, their input may describe a person but they may say their age is "apple". Correct behavior in that case is roll back the transaction and to tell the user an error occurred and they'll have to try again. There may be a requirement to report on every error we can find in the input, not just the first. In this case, I argued we should throw an exception. He disagreed, saying, "Exceptions should be exceptional: It's expected that the user may input invalid data, so this isn't an exceptional case" I didn't really know how to argue that point, because by definition of the word, he seems to be right. But, it's my understanding that this is why Exceptions were invented in the first place. It used to be you had to inspect the result to see if an error occurred. If you failed to check, bad things could happen without you noticing. Without exceptions every level of the stack needs to check the result of the methods they call and if a programmer forgets to check in one of these levels, the code could accidentally proceed and save invalid data (for example). Seems more error prone that way. Anyway, feel free to correct anything I've said here. My main question is if someone says Exceptions should be exceptional, how do I know if my case is exceptional?

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• Query something and return the reason if nothing has been found

  - by Daniel Hilgarth

  Assume I have a Query - as in CQS that is supposed to return a single value. Let's assume that the case that no value is found is not exceptional, so no exception will be thrown in this case. Instead, null is returned. However, if no value has been found, I need to act according to the reason why no value has been found. Assuming that the Query knows the reason, how would I communicate it to the caller of the Query? A simple solution would be not return the value directly but a container object that contains the value and the reason: public class QueryResult { public TValue Value { get; private set; } public TReason ReasonForNoValue { get; private set; } } But that feels clumsy, because if a value is found, ReasonForNoValue makes no sense and if no value has been found, Value makes no sense. What other options do I have to communicate the reason? What do you think of one event per reason? For reference: This is going to be implemented in C#.

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• Ubuntu 64bit Black Screen on Minecraft

  - by Signify

  I have tried posting on the forums, but I really need help (I'm a server admin and really don't want to have to switch to Windows just to run Minecraft). Anyhow, I originally was running openjdk6 as I was told that 7 was unstable and was getting periodical lag spikes while walking (at least once every 3 seconds the screen would freeze for a tenth of a second). After that, I attempted to install Sun's Java JDK7 (I couldn't get ahold of 6 without signing up for Oracle's newsletters). Upon attempting to run Minecraft, I got a black screen after logging in with this error message: 27 achievements 182 recipes Setting user: Thunder7102, -1618112820878091307 Exception in thread "Minecraft main thread" java.lang.UnsatisfiedLinkError: /home/noiro/.minecraft/bin/natives/liblwjgl.so: /home/noiro/.minecraft/bin/natives/liblwjgl.so: wrong ELF class: ELFCLASS32 (Possible cause: architecture word width mismatch) at java.lang.ClassLoader$NativeLibrary.load(Native Method) at java.lang.ClassLoader.loadLibrary1(ClassLoader.java:1939) at java.lang.ClassLoader.loadLibrary0(ClassLoader.java:1864) at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1825) at java.lang.Runtime.load0(Runtime.java:792) at java.lang.System.load(System.java:1059) at org.lwjgl.Sys$1.run(Sys.java:69) at java.security.AccessController.doPrivileged(Native Method) at org.lwjgl.Sys.doLoadLibrary(Sys.java:65) at org.lwjgl.Sys.loadLibrary(Sys.java:81) at org.lwjgl.Sys.<clinit>(Sys.java:98) at org.lwjgl.opengl.Display.<clinit>(Display.java:132) at net.minecraft.client.Minecraft.a(SourceFile:184) at net.minecraft.client.Minecraft.run(SourceFile:657) at java.lang.Thread.run(Thread.java:722) Now, this got me fed up, so I tried to install a Windows 7 virtual machine through virtualbox, I gave it 256mb of graphics memory with 2D and 3D acceleration and 3GB of RAM. I installed Java JDK7 for Windows (which does work from experience on my other Windows 7 partition). Once again, a black screen after login. What the heck is going on guys? My System Specs: Ubuntu 12.04 64bit Fully Updated running Gnome3 Nvidia GTS 450 1.3GB OC'd AMD Athlon II 4x 2.8Ghz 6GB of RAM So, what do you think?

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• Count function on tree structure (non-binary)

  - by Spevy

  I am implementing a tree Data structure in c# based (largely on Dan Vanderboom's Generic implementation). I am now considering approach on handling a Count property which Dan does not implement. The obvious and easy way would be to use a recursive call which Traverses the tree happily adding up nodes (or iteratively traversing the tree with a Queue and counting nodes if you prefer). It just seems expensive. (I also may want to lazy load some of my nodes down the road). I could maintain a count at the root node. All children would traverse up to and/or hold a reference to the root, and update a internally settable count property on changes. This would push the iteration problem to when ever I want to break off a branch or clear all children below a given node. Generally less expensive, and puts the heavy lifting what I think will be less frequently called functions. Seems a little brute force, and that usually means exception cases I haven't thought of yet, or bugs if you prefer. Does anyone have an example of an implementation which keeps a count for an Unbalanced and/or non-binary tree structure rather than counting on the fly? Don't worry about the lazy load, or language. I am sure I can adjust the example to fit my specific needs. EDIT: I am curious about an example, rather than instructions or discussion. I know this is not technically difficult...

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• CodePlex Daily Summary for Wednesday, August 13, 2014

  CodePlex Daily Summary for Wednesday, August 13, 2014Popular ReleasesLozzi's SharePoint 2013 Scripts: Lozzi.Fields (without Site Col Admin): This file is the same as the primary download, however I've removed the override allowing Site Collection Administrators access regardless of groups. This applies to the disableWithAllowance and hideWithAllowance functions.bitboxx bbcontact: 01.00.00: Release Notes bitboxx bbcontact 01.00.00bbcontact 01.00.00 will work for any DNN version 6.1.0 and up. - Initial releaseAD4 Application Designer for flow based .NET applications: AD4.AppDesigner.23.27: AD4.Iteration.23.27(Advanced Rendering Features) Refacturing: RenderStepPinsCaptions simplified by extending FlowChartStepPinDecoratorExtensions RenderFlowChartPinsCaptions simplified by FlowChartFlowPinDecoratorExtensions RenderWiresCaptions simplified by FlowChartWireDecoratorExtensions Design of tutorial samples updated Next tutorial finished: ThreadAsynchronizer Pattern (Version V7) ToDo: Some tutorials are unfinished but coming soon ... Note: The gluing code of the AD4.AppDesig...OooPlayer: 1.1: Added: Support for speex, TAK and OptimFrog files Added: An option to not to load cover art Added: Smaller package size Fixed: Unable to drag&drop audio files to playlist Updated: FLAC, WacPack and Opus playback libraries Updated: ID3v1 and ID3v2 tag librariesEWSEditor: EwsEditor 1.10 Release: • Export and import of items as a full fidelity steam works - without proxy classes! - I used raw EWS POSTs. • Turned off word wrap for EWS request field in EWS POST windows. • Several windows with scrolling texts boxes were limiting content to 32k - I removed this restriction. • Split server timezone info off to separate menu item from the timezone info windows so that the timezone info window could be used without logging into a mailbox. • Lots of updates to the TimeZone window. • UserAgen...Python Tools for Visual Studio: 2.1 RC: Release notes for PTVS 2.1 RC We’re pleased to announce the release candidate for Python Tools for Visual Studio 2.1. Python Tools for Visual Studio (PTVS) is an open-source plug-in for Visual Studio which supports programming with the Python language. PTVS supports a broad range of features including CPython/IronPython, editing, IntelliSense, interactive debugging, profiling, Microsoft Azure, IPython, and cross-platform debugging support. PTVS 2.1 RC is available for: Visual Studio Expre...Aspose for Apache POI: Missing Features of Apache POI SS - v 1.2: Release contain the Missing Features in Apache POI SS SDK in comparison with Aspose.Cells What's New ? Following Examples: Create Pivot Charts Detect Merged Cells Sort Data Printing Workbooks Feedback and Suggestions Many more examples are available at Aspose Docs. Raise your queries and suggest more examples via Aspose Forums or via this social coding site.AngularGo (SPA Project Template): AngularGo.VS2013.vsix: First ReleaseDaphne 2014 - application for playing Czech Draughts: Daphne 2014 verze 0.9.0.21: Daphne 2014 verze 0.9.0.21MFCBDAINF: MFCBDAINF: Added recognition of TBS, Hauppauge, DVBWorld and FireDTV proprietary GUID'sFluffy: Fluffy 0.3.35.4: Change log: Text editorSKGL - Serial Key Generating Library: SKGL Extension Methods 4 (1.0.5.1): This library contains methods for: Time change check (make sure the time has not been changed on the client computer) Key Validation (this will use http://serialkeymanager.com/ to validate keys against the database) Key Activation (this will, depending on the settings, activate a key with a specific machine code) Key Activation Trial (allows you to update a key if it is a trial key) Get Machine Code (calculates a machine code given any hash function) Get Eight Byte Hash (returns an...Touchmote: Touchmote 1.0 beta 13: Changes Less GPU usage Works together with other Xbox 360 controls Bug fixesPublic Key Infrastructure PowerShell module: PowerShell PKI Module v3.0: Important: I would like to hear more about what you are thinking about the project? I appreciate that you like it (2000 downloads over past 6 months), but may be you have to say something? What do you dislike in the module? Maybe you would love to see some new functionality? Tell, what you think! Installation guide:Use default installation path to install this module for current user only. To install this module for all users — enable "Install for all users" check-box in installation UI ...Modern UI for WPF: Modern UI 1.0.6: The ModernUI assembly including a demo app demonstrating the various features of Modern UI for WPF. BREAKING CHANGE LinkGroup.GroupName renamed to GroupKey NEW FEATURES Improved rendering on high DPI screens, including support for per-monitor DPI awareness available in Windows 8.1 (see also Per-monitor DPI awareness) New ModernProgressRing control with 8 builtin styles New LinkCommands.NavigateLink routed command New Visual Studio project templates 'Modern UI WPF App' and 'Modern UI W...Roll20 Custom Power Card Macro Generator: R20CPCMG 0.2.0.0 Public Beta: This is the beta release for version 0.2.0.0. Its still very much a work in progress, but I'd rather get this out now before another lapse in updates so we can solicit feedback from the community. The two main updates for this version is that you can now import macros and you can customize the tag buttons and group them by game system. The Import Macro function turns the raw text, like the following, into something you can easily edit inside the program. !power --name|Whirling Assault --us...Utility Database: UtilityDB.2.0: Release Notes: Version 2.0 This is the second release of the UtilityDB, it builds on top of and includes the Version 1.8 of code. This release focus on performance metrics in particular Disk I/O. The deployment scripts have been rewritten to utilize transactions to insure completeness of script execution. This project releases the source code as a SQL Server 2012 project file. The intended way to deliver the scripts to the database is through the execution of the @BuildScript.sql in the ...ClosedXML - The easy way to OpenXML: ClosedXML 0.74.0: Multiple thread safe improvements including AdjustToContents XLHelper XLColor_Static IntergerExtensions.ToStringLookup Exception now thrown when saving a workbook with no sheets, instead of creating a corrupt workbook Fix for hyperlinks with non-ASCII Characters Added basic workbook protection Fix for error thrown, when a spreadsheet contained comments and images Fix to Trim function Fix Invalid operation Exception thrown when the formula functions MAX, MIN, and AVG referenc...SEToolbox: SEToolbox 01.042.019 Release 1: Added RadioAntenna broadcast name to ship name detail. Added two additional columns for Asteroid material generation for Asteroid Fields. Added Mass and Block number columns to main display. Added Ellipsis to some columns on main display to reduce name confusion. Added correct SE version number in file when saving. Re-added in reattaching Motor when drag/dropping or importing ships (KeenSH have added RotorEntityId back in after removing it months ago). Added option to export and r...jQuery List DragSort: jQuery List DragSort 0.5.2: Fixed scrollContainer removing deprecated use of $.browser so should now work with latest version of jQuery. Added the ability to return false in dragEnd to revert sort order Project changes Added nuget package for dragsort https://www.nuget.org/packages/dragsort Converted repository from SVN to MercurialNew Projectsangle.works: Sample AngularJS projectArtezio spTree for SharePoint 2013: spTree is a jQuery plugin to display SharePoint websites and lists in a tree view. It uses jsTree plugin to display data, expand and complement its settings.DigitalProject: no project ,no project ,no project ,no project ,no project ,no project ,no project ,no project ,no project ,no project ,no project ,no project ,no project ,no popenelecmedicrec: its an open source emrPetriFlow: A new solution for workflow using Petri NetReflexive .Net: Stream transformation over durable and transient channelsrunner-prototype: Small game prototype for self-practicing, likely no use at all for anyone else.Spizzi PowerShell Module: This project provides different PowerShell CmdLet's combined into one module to extend the built-in PowerShell Modules.Testill: Test Web Fabricator: A highly composable web fabricwingate log parser: wingate log parser

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