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• Could not load file or assembly FSharp.Core, Version=4.0.0.0

  - by Ken

  I'm trying to deploy a web application which uses F# 4.0 on Windows Server 2008. It works on my computer where VS2010 is installed but it doesn't work on the server. Everytime you open the page you'll get this error message: Could not load file or assembly 'FSharp.Core, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The system cannot find the file specified. I've installed .NET 4 using the web platform installer. F# PowerPack is installed too. I found this page: http://connect.microsoft.com/VisualStudio/feedback/details/507202/error-in-working-with-f It suggests you to reinstall F#, but the link to download F# seems to be broken. And it might not be the same problem I have. I've also tried to install Microsoft F# 2.0.0.0 since it's the only F# redistribution I could find. But it doesn't help at all. Has anyone get something like this to work? Any help would be appreciated. Thanks.

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• glm matrix conversion for DirectX

  - by niktehpui

  For on of the coursework specification I need to work with DirectX, so I tried to implement a DirectX Renderer in my small cross-platform framework (to have it optionally available for Windows). Since I want to stick to my dependencies I want use glm for vector/matrix/quaternions math. The vectors seem to be fully compatible with DirectX, but the glm::mat4 is not working properly in DirectX Effects Framework. I assumed the reason is that DirectX uses row majors layouts and OpenGL column majors (although if I remember right internally in HLSL DX uses column major as well), so I transposed the matrix, but I still get no proper results compared to using XNA-Math. XNA-Version of the code (works): XMMATRIX world = XMMatrixIdentity(); XMMATRIX view = XMMatrixLookAtLH(XMVectorSet(5.0, 5.0, 5.0, 1.0f), XMVectorZero(), XMVectorSet(0.0f, 1.0f, 0.0f, 0.0f)); XMMATRIX proj = XMMatrixPerspectiveFovLH(0.25f*3.14f, 1.25f, 1.0f, 1000.0f); XMMATRIX worldViewProj = world*view*proj; m_fxWorldViewProj->SetMatrix(reinterpret_cast<float*>(&worldViewProj)); This works flawlessly and displays the expected colored cube. GLM-Version (does not work): glm::mat4 world(1.0f); glm::mat4 view = glm::lookAt(glm::vec3(5.0f, 5.0f, 5.0f), glm::vec3(0.0f, 0.0f, 0.0f), glm::vec3(0.0f, 1.0f, 0.0f)); glm::mat4 proj = glm::perspective(0.25f*3.14f, 1.25f, 1.0f, 1000.0f); glm::mat4 worldViewProj = glm::transpose(world*view*proj); m_fxWorldViewProj->SetMatrix(glm::value_ptr(worldViewProj)); Displays nothing, screen stays black. I really would like to stick to glm on all platforms.

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• motion computation from video using pyglet in python

  - by kuaywai

  Hi, I am writing a simple motion detection program but i want it to be cross platform so im using python and the pyglet library since it provides a simple way to load videos in different formats (specially wmv and mpeg). So far i have the code given below which loads the movie and plays it in a window. Now i need to: 1) grab frame at time t and t-1 2) do a subtraction to see which pixels are active for motion detection. any ideas on how to grab frames and to skip over frames and is it possible to put the pixel values into a matrix in numpy or something directly from pyglet? or should look into using something other than pyglet? thanks kuaywai import pyglet import sys window = pyglet.window.Window(resizable=True) window.set_minimum_size(320,200) window.set_caption('Motion detect 1.0') video_intro = pyglet.resource.media('movie1.wmv') player = pyglet.media.Player() player.queue(video_intro) print 'calculating movie size...' if not player.source or not player.source.video_format: sys.exit myWidth = player.source.video_format.width myHeight = player.source.video_format.height if player.source.video_format.sample_aspect 1: myWidth *= player.source.video_format.sample_aspect elif player.source.video_format.sample_aspect < 1: myHeight /= player.source.video_format.sample_aspect print 'its size is %d,%d' % (myWidth,myHeight) player.play() @window.event def on_draw(): window.clear() (w,h) = window.get_size() player.get_texture().blit(0, h-myHeight, width=myWidth, height=myHeight) pyglet.app.run()

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• Noob Objective-C/C++ - Linker Problem/Method Signature Problem

  - by Josh

  There is a static class Pipe, defined in C++ header that I'm including. The static method I'm interested in calling (from Objetive-c) is here: static ERC SendUserGet(const UserId &_idUser,const GUID &_idStyle,const ZoneId &_idZone,const char *_pszMsg); I have access to an objetive-c data structure that appears to store a copy of userID, and zoneID -- it looks like: @interface DataBlock : NSObject { GUID userID; GUID zoneID; } Looked up the GUID def, and its a struct with a bunch of overloaded operators for equality. UserId and ZoneId from the first function signature are #typedef GUID Now when I try to call the method, no matter how I cast it (const UserId), (UserId), etc, I get the following linker error: Ld build/Debug/Seeker.app/Contents/MacOS/Seeker normal i386 cd /Users/josh/Development/project/Mac/Seeker setenv MACOSX_DEPLOYMENT_TARGET 10.5 /Developer/usr/bin/g++-4.2 -arch i386 -isysroot /Developer/SDKs/MacOSX10.5.sdk -L/Users/josh/Development/TS/Mac/Seeker/build/Debug -L/Users/josh/Development/TS/Mac/Seeker/../../../debug -L/Developer/Platforms/iPhoneOS.platform/Developer/usr/lib/gcc/i686-apple-darwin10/4.2.1 -F/Users/josh/Development/TS/Mac/Seeker/build/Debug -filelist /Users/josh/Development/TS/Mac/Seeker/build/Seeker.build/Debug/Seeker.build/Objects-normal/i386/Seeker.LinkFileList -mmacosx-version-min=10.5 -framework Cocoa -framework WebKit -lSAPI -lSPL -o /Users/josh/Development/TS/Mac/Seeker/build/Debug/Seeker.app/Contents/MacOS/Seeker Undefined symbols: "SocPipe::SendUserGet(_GUID const&, _GUID const&, _GUID const&, char const*)", referenced from: -[PeoplePaneController clickGet:] in PeoplePaneController.o ld: symbol(s) not found collect2: ld returned 1 exit status Is this a type/function signature error, or truly some sort of linker error? I have the headers where all these types and static classes are defined #imported -- I tried #include too, just in case, since I'm already stumbling :P Forgive me, I come from a web tech background, so this c-style memory management and immutability stuff is super hazy. Edit: Added full linker error text. Changed "function" to "method" Thanks, Josh

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• Haskell: 'No instance for' arising from a trivial usage of Regex library

  - by artemave

  Following the (accepted) answer from this question, I am expecting the following to work: Prelude Text.Regex.Posix Text.Regex.Base.RegexLike Text.Regex.Posix.String> makeRegex ".*" (makeRegex is a shortcut for makeRegexOpts with predefined options) However, it doesn't: <interactive>:1:0: No instance for (RegexMaker regex compOpt execOpt [Char]) arising from a use of `makeRegex' at <interactive>:1:0-13 Possible fix: add an instance declaration for (RegexMaker regex compOpt execOpt [Char]) In the expression: makeRegex ".*" In the definition of `it': it = makeRegex ".*" Prelude Text.Regex.Posix Text.Regex.Base.RegexLike Text.Regex.Posix.String> make Regex ".*"::Regex <interactive>:1:0: No instance for (RegexMaker Regex compOpt execOpt [Char]) arising from a use of `makeRegex' at <interactive>:1:0-13 Possible fix: add an instance declaration for (RegexMaker Regex compOpt execOpt [Char]) In the expression: makeRegex ".*" :: Regex In the definition of `it': it = makeRegex ".*" :: Regex And I really don't understand why. EDIT Haskell Platform 2009.02.02 (GHC 6.10.4) on Windows EDIT2 Prelude Text.Regex.Base.RegexLike Text.Regex.Posix.String> :i RegexMaker class (RegexOptions regex compOpt execOpt) => RegexMaker regex compOpt execOpt source | regex -> compOpt execOpt, compOpt -> regex execOpt, execOpt -> regex compOpt where makeRegex :: source -> regex makeRegexOpts :: compOpt -> execOpt -> source -> regex makeRegexM :: (Monad m) => source -> m regex makeRegexOptsM :: (Monad m) => compOpt -> execOpt -> source -> m regex -- Defined in Text.Regex.Base.RegexLike

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• In an iPad SplitView, how do I add a Date Picker control to the Root View?

  - by Dr Dork

  I'm diving into iPhone OS development on the iPad and one of the things I'm playing with is the SplitView template. The template provides a window with a UISplitView view, containing the Root View (on the left of the window) and the Detail View (on the right of the window). The Root View is a subclass of a TableView. Rather than having the entire Root View consist of a TableView, I'd like it to contain a DatePicker view along with the TableView under it. When I go into IB and try and drop a DatePicker into the Root View, it won't let me. It will only let me add a DatePicker view to the Detail View. Why wont IB let me drop a DatePicker view into the Root View? How can I add a DatePicker to the RootView in addition to the TableView? I'm still learning this new platform, so I apologize if these questions are absurd in any way. Thanks so much in advance for your help, I'm going to continue researching these questions right now.

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• Most useful free .NET libraries?

  - by Binoj Antony

  I have used a lot of free .NET libraries, some from Microsoft itself! Which ones have you found the most useful? Dependency Injection/Inversion of Control Unity Framework - Microsoft StructureMap - Jeremy Miller Castle Windsor NInject Spring Framework Autofac Managed Extensibility Framework Logging Logging Application Block - Microsoft Log4Net - Apache Error Logging Modules and Handlers(ELMAH) NLog Compression SharpZipLib DotNetZip YUI Compressor (CSS and JS compression/minification) AjaxMinifier (in other downloads) (JS compression. Also includes MSBuild task) Ajax Ajax Control Toolkit - Microsoft AJAXNet Pro Data Mapper XmlDataMapper AutoMapper ORM NHibernate Castle ActiveRecord Subsonic XmlDataMapper Charting/Graphics Microsoft Chart Controls for ASP.NET 3.5 SP1 Microsoft Chart Controls for Winforms ZedGraph Charting NPlot - Charting for ASP.NET and WinForms PDF Creators/Generators PDFsharp iTextSharp Unit Testing/Mocking NUnit Rhino Mocks Moq TypeMock.Net xUnit.net mbUnit Machine.Specifications Automated Web Testing Selenium Watin URL Rewriting url rewriter UrlRewriting.Net Url Rewriter and Reverse Proxy - Managed Fusion Controls Krypton - Free winform controls Source Grid - A Grid control Devexpress - free controls Unclassified CSLA Framework - Business Objects Framework AForge.net - AI, computer vision, genetic algorithms, machine learning Enterprise Library 4.1 - Logging, Exception Management, Validation, Policy Injection File helpers library C5 Collections - Collections for .NET Quartz.NET - Enterprise Job Scheduler for .NET Platform MiscUtil - Utilities by Jon Skeet Lucene.net - Text indexing and searching Json.NET - Linq over JSON Flee - expression evaluator PostSharp - AOP IKVM - brings the extensive world of Java libraries to .NET. Title of the question taken from here. [EDIT] Please provide links to these free libraries as well. Once we have a huge list of this, it can be arranged in categories! Please do not mention .NET Applications/EXEs here.

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• converting 2D mouse coordinates to 3D space in OpenGL ES

  - by Jayesh

  I want to convert mouse's current X and Y coordinates into the 3D space I have drawn in the viewport. I need to do this on the OpenGL ES platform. I found following possible solutions implemented in OpenGL, but none fits what I am looking for. I found NeHe's tutorial on doing exactly this, but in traditional OpenGL way. It uses gluUnProject. http://nehe.gamedev.net/data/articles/article.asp?article=13 Although gluUnProject is not available in OpenGL ES, its implementation seems simple enough to port back. But before calling it, we need to call glReadPixels with GL_DEPTH_COMPONENT and that is not possible in OpenGL ES. (The reason I found in this thread: http://www.khronos.org/message_boards/viewtopic.php?f=4&t=771) What I want to do is similar to picking, except that I don't want to select the object but I want exact coordinates so that I can recognize particular portion of the object that is currently under mouse cursor. I went through the Picking tutorials in this answer. http://stackoverflow.com/posts/2211312/revisions But they need glRenderMode, which I believe is absent in OpenGL ES. If you know how to solve this problem in OpenGL ES, please let me know. Thanks.

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• iPhone: Software Development And Distribution

  - by xsl

  I have a few quick questions about the iPhone software development. I did some research about the topic, but there are a few specific things I would like to ask here, because I will have to estimate the cost of the required hardware and software, before I am allowed to buy anything. I never did any Mac development nor have I ever owned an iPhone, so needless to say this is quite hard for me. I will buy an iMac mini with 2 GB RAM for iPhone development. I will have to use it at the same time as my regular PC, but the majority of the time I won't use the Mac at all. Do I have to buy an additional monitor, a mouse and a keyboard or is there a better solution? I will have to port a C library to the iPhone platform and develop an iPhone application that uses the ported library. Do I need anything else than the iPhone SDK to do this? If I use an external library (see above), can I test the application with the integrated emulator, or is it recommend to buy the device? In a later phase of the project I will have to buy an iPhone, but I will have to wait until the iPhone 4 is released here in Europe, because the application requires a camera. In addition to this I will have to send data to a remote webservice. Aside from these two things I don't require any other features. Can I just buy the iPhone online from another country (the iPhones here are sim locked), or should I buy one with a contract? When the application is ready, it will be installed on a few iPhones owned by our customer. Because of security reasons it is crucial that there is no third party involved in this process (i.e. the application should not be distributed on the app store). Is this possible?

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• In the Xcode SplitView template for an iPad app, how do I add a Date Picker control to the Root View

  - by Dr Dork

  I'm diving into iPhone OS development on the iPad and one of the things I'm playing with is the SplitView template. The template provides a window with a UISplitView view, containing the Root View (on the left of the window) and the Detail View (on the right of the window). The Root View is a subclass of a TableView. Rather than having the entire Root View consist of a TableView, I'd like it to contain a DatePicker view along with the TableView under it. When I go into IB and try and drop a DatePicker into the Root View, it won't let me. It will only let me add a DatePicker view to the Detail View. Why wont IB let me drop a DatePicker view into the Root View? How can I add a DatePicker to the RootView in addition to the TableView? I'm still learning this new platform, so I apologize if these questions are absurd in any way. Thanks so much in advance for your help, I'm going to continue researching these questions right now.

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• SGEN doesn't work after upgrading from VS2008 to VS2010

  - by emddudley

  I just recently upgraded a VS2008/.NET 3.5 SP1 project to VS2010 and .NET 4. I have a post-build event which calls SGEN to generate the XmlSerializers assembly. Whenever I try to run it I get the following error. "C:\Program Files\Microsoft SDKs\Windows\v7.0A\bin\sgen.exe" /debug /force /verbose /c:"platform:x86" "C:\path\to\SomeAssembly.dll" Microsoft (R) Xml Serialization support utility [Microsoft (R) .NET Framework, Version 2.0.50727.3038] Copyright (C) Microsoft Corporation. All rights reserved. Error: An attempt was made to load an assembly with an incorrect format: c:\path\to\someassembly.dll. - Could not load file or assembly 'file:///c:\path\to\someassembly.dll' or one of its dependencies. This assembly is built by a runtime newer than the currently loaded runtime and cannot be loaded. If you would like more help, please type "sgen /?". I get the same error running SGEN from the command line, but I can't figure out what the problem is. Any ideas?

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• MSbuild task fails because "Any CPU" solution is built out of order

  - by Art Vandalay

  I have two solutions to build in Teambuild, one is the application itself, the other one is the WiX installer. I want to build the application using "Any CPU" build configuration and the installer using "x86". I've listed the "Any CPU" solution first in my project file, but Teambuild always builds the "x86" solution first. I'm setting BuildSolutionsInParallel = false, but it still builds the solutions in the reverse listed order. If I change the first solution to "Mixed Platform", it works fine. How can I get the solutions to build in the order listed in the project file? <Project ...> <PropertyGroup> <!-- We want to build the install solution after the build solution --> <BuildSolutionsInParallel>false</BuildSolutionsInParallel> </PropertyGroup> <ItemGroup> <SolutionToBuild Include="$(BuildProjectFolderPath)/Pricer/Pricer.sln"> <Targets></Targets> <Properties></Properties> </SolutionToBuild> <SolutionToBuild Include="$(BuildProjectFolderPath)/Pricer/Pricer.Install/Pricer.Install.sln"> <Targets></Targets> <Properties></Properties> </SolutionToBuild> </ItemGroup> <ItemGroup> <ConfigurationToBuild Include="Release|Any CPU"> <FlavorToBuild>Release</FlavorToBuild> <PlatformToBuild>Any CPU</PlatformToBuild> </ConfigurationToBuild> <ConfigurationToBuild Include="Release|x86"> <FlavorToBuild>Release</FlavorToBuild> <PlatformToBuild>x86</PlatformToBuild> </ConfigurationToBuild> </ItemGroup> </Project>

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• Can't install plugins in Eclipse 3.5 (Galileo) on Ubuntu

  - by dfrankow

  Eclipse Version 3.5.2 Build id: M20100211-1343 Platform: Ubuntu 10.4 I go to install any new software Eclipse plugins (e.g., pydev, subclipse), and it gets to the 60% mark and stops. I wait for a long while and nothing happens. When I hit "cancel" a security warning comes up "Warning: You are installing software that contains unsigned content.." I click "OK" but it's too late because I've cancelled the installation already. It won't pop up until I hit "cancel". I've tried moving all the windows around, that security warning is not there. In previous incarnations of Eclipse, I've been able to click "OK" on that warning (no canceling) and all is well. I've also tried two JREs (Ubuntu's default openjdk and Sun's JDK 1.6.0_20). Is there some way to get that warning to come up, or even just have it always accept unsigned content? I've downloaded the zip of pydev and unzipped it into ~/.eclipse/org.eclipse.platform_3.5.0_155965261/ and Eclipse doesn't have Pydev when restarted, so manually installing plugins is also a pain. This is not my day. Yes, I see the other questions of this type and they don't seem to answer my problem.

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• How can I install asp.net mvc 2 on IIS7?

  - by Gary McGill

  I have developed an ASP.NET MVC 2 website, and now need to deploy it to my web server. I've overcome some hurdles already, since ASP.NET was not installed etc. but I've now got to the point where I can serve up plain content files, and if I try to hit one of my MVC URLs I get this: Could not load file or assembly 'System.Web.Mvc, Version=2.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The system cannot find the file specified. Not surprising, that, as I've not installed MVC2. Problem is, I can't find any good information about how to install it! The Microsoft Download Center lists 3 files, none of which look promising: ASP.NET-MVC-2-RTM-Release-Notes.doc AspNetMVC2_VS2008.exe mvc2-ms-pl.zip The site doesn't bother to explain what the files actually are, but I assume that the last file is the source code. That's what it looks like, anyway. The release notes are no help whatsoever, since they're all about installing on your development machine, and indeed the name of the EXE makes it clear that that's all about Visual Studio integration too. So how do I actually deploy the darn thing? The other option linked to from Scott Gu's blog is the Microsoft Web Platform Installer. Now, I don't want to install more than just MVC2, and I already have IIS etc. set up, so this seems a bit heavy. But it's all academic, as it refuses to run on my server, saying "your system is not supported" or words to that effect. (The server is Windows Server 2008 Standard SP2, so I really don't know what it's problem is). Help! [It's ridiculous that this should be so hard - or perhaps not hard at all, but certainly a well-kept secret!]

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• LINQ to Entities exceptions (ElementAtOrDefault and CompareObjectEqual)

  - by OffApps Cory

  I am working on a shipping platform which will eventually automate shipping through several major carriers. I have a ShipmentsView Usercontrol which displayes a list of Shipments (returned by EntityFramework), and when a user clicks on a shipment item, it spawns a ShipmentEditView and passes the ShipmentID (RecordKey) to that view. I initially wrestled with trying to get the context from the parent (ShipmentsView) and finally gave up resolving to get to it later. I wanted to do this to keep a single instance of the context. anyhow, I now create a new instance of the context in my ShipmentEditViewModel, and query against it for the Shipment record. I know I could just pass the record, but I wanted to use the Ocean Framework that Karl Shifflett wrote and don't want to muck about writing new transition methods. So anyhow, I query and when stepping through, I can see that it returns a record, as soon as execution reached the point where it assigned the query result to the e.Result property, it throws up the following exception depending on the query I used. LINQToEntities Dim RecordID As Decimal = CDec(e.Argument) Dim myResult = From ship In _Context.Shipment _ Where ship.ShipID = e.Argument _ Select ship Select Case myResult.Count Case 0 e.Result = New Shipment Case 1 e.Result = myResult(0) Case Else e.Result = Nothing End Select "LINQ to Entities does not recognize the method 'System.Object.CompareObjectEqual(System.Object, System.Object, Boolean)' method, and this method cannot be translated into a store expression. LINQToEntities via Method calls Dim RecordID As Decimal = CDec(e.Argument) Dim myResult = _Context.Shipment.Where(Function(s) s.ShipID = RecordID) Select Case myResult.Count Case 0 e.Result = New Shipment Case 1 e.Result = myResult(0) Case Else e.Result = Nothing End Select LINQ to Entities does not recognize the method 'SnazzyShippingDAL.Shipment ElementAtOrDefault[Shipment] (System.Linq.IQueryable`1[SnazzyShippingDAL.Shipment], Int32)' method, and this method cannot be translated into a store expression. I have been trying to get this thing to display a record for like three days. i am seriously thinking about going back and re=-engineering it without the MVVM pattern (which I realize I am only starting to learn and understand) if only to make the &$^%ed thing work. Any help will be muchly appreciated. Cory

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• Changing the Android emulator locale automatically

  - by Christopher

  For automated testing (using Hudson) I have a script that generates a bunch of emulators for many combinations of Android OS version, screen resolution, screen density and language. This works fine, except for the language part. I need to find a way to change the Android system locale automatically. Here's some approaches I can think of, in order of preference: Extracting/editing/repacking a QEMU image directly before starting the emulator Running some sort of system-locale-changing APK on the emulator after startup Changing the locale settings on the emulator filesystem after startup Changing the locale settings in some SQLite DB on the emulator after startup Running a key sequence (via the emulator's telnet interface) that would open the settings app and change the locale Manually starting the emulator for each platform version, changing the locale by hand in the settings, saving it and archiving the images for later deployment Any ideas whether this can be done, either via the above methods or otherwise? Do you know where locale settings are persisted to/read from by the system? Solution: Thanks to dtmilano's info about the relevant properties, and some further investigation on my part, I came up with a solution even better and simpler simpler than all the ideas above! I have updated the answer below with the details.

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• Notification Email Best Practices--From Server Setup to Programming

  - by Andrew Wagner

  All, I'm in the process now of building a SaaS tool that allows network admins to generate notification emails to the members of the end-users of our platform (among many many other things). I'm running into a bit of an "out of my expertise" wall, as I know there are a lot of variables involved with configuring an application that can: Run in a distributed way via load balancing and still-- Leverage a single mail server for sending notification emails Process unsubscribe requests Avoid any ISP blacklisting in the process. If anyone has the time and has done this before, I'd love if you could walk me through the A-Z of best practices both from a configuration perspective and an execution perspective for generating these emails (anything from necessary DNS settings to ideal SMTP setup and configuration) Currently, our application generates email via Google Apps using the PHPMailer class. While this works well, it doesn't queue messages (potential for timeout problems if any of our clients amass a very large list of end-users), and Google limits the amount of allowed generated email messages to 500/day. I know this is a lofty question, but any guidance you could provide would be smashing and a big help as we work through this hurtle in our beta development stage. Thanks!

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• RIA IDE - Visual Studio 2010, FlashBuilder and ExtJS Designer

  - by Ronaldo Junior

  I've been playing around with Flex4 - the trial version - and is really quite good in terms of layout development - since I'm starting a new RIA project and we still on the "what platform" phase I better listen what you guys have to say. In Flashbuilder I can do the layout and mix with the back end script code really fast - the version 4 give me the power to even test the functionality of the server side script, etc and since I can use Fllashbuilder as a Eclipse plugin, I end up with only one IDE. On the other hand, with Silverlight, it looks like if I want a "drag and drop" approach to build my interface I would need Expression Blend and Visual Studio (full or express version). Is there a way out that? I mean, Visual Studio 2010 will come with some sort of Silverlight component palet so that you can easily drag and drop it on your interface like you would do with WPF, etc? I don't wanna use Blend - is way too much for what we need - taking the "coding XAML" by hand is out of question as well. A third approach is to use ExtJS - they have a new designer IDE that looks promising.

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• Really slow obtaining font metrics.

  - by Artur

  So the problem I have is that I start my application by displaying a simple menu. To size and align the text correctly I need to obtain font metrics and I cannot find a way to do it quickly. I tested my program and it looks like whatever method I use to obtain font metrics the first call takes over 500 milliseconds!? Because of it the time it takes to start-up my application is much longer than necessary. I don't know if it is platform specific or not, but just in case, I'm using Mac OS 10.6.2 on MacBook Pro (hardware isn't an issue here). If you know a way of obtaining font metrics quicker please help. I tried these 3 methods for obtaining the font metrics and the first call is always very slow, no matter which method I choose. import java.awt.Font; import java.awt.FontMetrics; import java.awt.Graphics; import java.awt.Graphics2D; import java.awt.font.FontRenderContext; import java.awt.font.LineMetrics; import javax.swing.JFrame; public class FontMetricsTest extends JFrame { public FontMetricsTest() { setVisible(true); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); } @Override public void paint(Graphics g) { Graphics2D g2 = (Graphics2D) g; Font font = new Font("Dialog", Font.BOLD, 10); long start = System.currentTimeMillis(); FontMetrics fontMetrics = g2.getFontMetrics(font); // LineMetrics fontMetrics1 = // font.getLineMetrics("X", new FontRenderContext(null, false, false)); // FontMetrics fontMetrics2 = g.getFontMetrics(); long end = System.currentTimeMillis(); System.out.println(end - start); g2.setFont(font); } public static void main(String[] args) { new FontMetricsTest(); } }

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• Binary serialization/de-serialization in C++ and C#

  - by 6pack kid

  Hello. I am working on a distributed application which has two components. One is written in standard C++ (not managed C++) and the other one is written in C#. Both are communicating via a message bus. I have a situation in which I need to pass objects from C++ to C# application and for this I need to serialize those objects in C++ and de-serialize them in C# (something like marshaling/un-marshaling in .NET). I need to perform this serialization in binary and not in XML (due to performance reasons). I have used Boost.Serialization to do this when both ends were implemented in C++ but now that I have a .NET application on one end, Boost.Serialization is not a viable solution. I am looking for a solution that allows me to perform (de)serialization across C++ and .NET boundary i.e., cross platform binary serialization. I know I can implement the (de)serialization code in a C++ dll and use P/Invoke in the .NET application, but I want to keep that as a last resort. Also, I want to know if I use some standard like gzip, will that be efficient? Are there any other alternatives to gzip? What are the pros/cons of them? Thanks

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• How to allow to allow admins to edit my app's config files without UAC elevation?

  - by Justin Grant

  My company produces a cross-platform server application which loads its configuration from user-editable configuration files. On Windows, config file ACLs are locked down by our Setup program to allow reading by all users but restrict editing to Administrators and Local System only. Unfortunately, on Windows Server 2008, even local administrators no longer have admin privileges (because of UAC) unless they're running an elevated app. This has caused complaints from users who cannot use their favorite text editor to open and save config files changes-- they can open the files (since anyone can read) but can't save. Anyone have recommendations for what we can do (if anything) in our app's Setup to make editing easier for admins on Windows Server 2008? Related questions: if a Windows Server 2008 admin wants to edit an admins-only config file, how does he normally do it? Is he forced to use a text editor which is smart enough to auto-elevate when elevation is needed, like Windows Explorer does in response to access denied errors? Does he launch the editor from an elevated command-prompt window? Something else?

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• Ideas for OpenSource CMS in ASP.NET MVC

  - by rajesh pillai

  I am in the process of collecting ideas for building an opensource CMS based on ASP.net framework. I have choosen ASP.NET MVC with Jquery as the tool to develop this. I have made this as community wiki. Background: Most of the good CMS that is available is built on PHP, though off late CMS built on ASP.net framework seems to be cropping up. I would like to collect ideas/suggestion/expectations from an opensource CMS system for ASP.net platform. I am looking for expectation from technology and features that you wish could find in a modern CMS and any other thoughts/ideas that comes to your mind. Your input would be of great help in this direction. Meanwhile I am also reviewing many opensource CMS system built on ASP.net as well as MS Office Sharepoint to get ideas and I would update my findings here for your reference. The following are some of the opensource CMS/BlogEngines that I am in the process of reviewing. -Oxite (ASP.net MVC) : This is the new kid on the block -Wordpress -BlogEngine.net -Umbraco Some of the features that I can think of is noted below Simplified content creation Support Multiple content author Metadata feature Workflow engine Simplified deployment List based contents (sharepoint like) Customizable URL's Support content Caching Roles (contenauthor, contentpublisher etc) Support different types of content (like html, txt, document, image, videos) Skinnable (support extensible themes) Localization & Globalization Unlimited nesting of categories Readymade template for blog, forums,survey. Good documentation You can add your points or add some depth to any of the above feature.

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• Easy to use AutoHotkey/AutoIT alternatives for Linux

  - by Xeddy

  Hi all, I'm looking for recommendations for an easy-to-use GUI automation/macro platform for Linux. If you're familiar with AutoHotkey or AutoIT on Windows, then you know exactly the kind of features I need, with the level of complexity. If you aren't familiar, then here's a small code snippet of how easy it is to use AHK: InputBox, varInput, Please enter some random text... Run, notepad.exe WinWaitActive, Untitled - Notepad SendInput, %varInput% SendInput, !f{Up}{Enter}{Enter} WinWaitActive, Save SendInput, SomeRandomFile{Enter} MsgBox, Your text`, %varInput% has been saved using notepad! #n::Run, notepad.exe Now the above example, although a bit pointless, is a demo of the sort of functionality and simplicity I'm looking for. Here's an explanation for those who don't speak AHK: ----Start of Explanation of Code ---- Asks user to input some text and stores it in varInput Runs notepad.exe Waits till window exists and is active Sends the contents of varInput as a series of keystrokes Sends keystrokes to go to File - Exit Waits till the "Save" window is active Sends some more keystrokes Shows a Message Box with some text and the contents of a variable Registers a hotkey, Win+N, which when pressed executes notepad.exe ----End of Explanation---- So as you can understand, the features are quite obvious: Ability to easily simulate keyboard and mouse functions, read input, process and display output, execute programs, manipulate windows, register hotkeys, etc.. all being done without requiring any #includes, unnecessary brackets, class declarations etc. In short: Simple. Now I've played around a bit with Perl and Python, but its definitely no AHK. They're great for more advanced stuff, but surely, there has to be some tool out there for easy GUI automation? PS: I've already tried running AHK with Wine but sending keystrokes and hotkeys don't work.

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• How do you keep all your languages straight?

  - by Chris Blackwell

  I think I'm going a little crazy. Right now, I'm working with the following languages (I was just doing a mental inventory): C++ - our game engine Assembler - low level debugging and a few co-processor specific routines Lua - our game engine scripting language HLSL - for shaders Python - our build system and utility tools Objective C/C++ - game engine platform code for Mac and iPhone C# - A few tools developed in our overseas office ExtendScript - Photoshop exporting tools ActionScript - UI scripting VBScript - some spreadsheet related stuff PHP - some web related stuff SQL - some web and tool related stuff On top of this are the plethora of API's that often have many different ways of doing the same thing: std library, boost, .NET, wxWidgets, Cocoa, Carbon, native script libraries for Python, Lua, etc, OpenGL, Direct3d, GDI, Aqua, augh! I find myself inadvertently conflating languages and api's, not realizing what I'm doing until I get syntax errors. I feel like I can't possibly keep up with it, and I can't possibly be proficient in all of these areas. Especially outside the realm of C++ and Python, I find myself programming more by looking at manuals that from memory. Do you have a similar problem? Ideas for compartmentalizing so you're more efficient? Deciding where you want to stay proficient? Organizational tips? Good ways to remember when you switch from Lua to C++ you need to start using semi-colons again? Rants on how complicated we programmers have made things for ourselves? Any ideas welcome!

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• Language+IDE for teaching high school students?

  - by daveagp

  I'm investigating languages and IDEs for a project involving teaching high-school students (around grade 11). It will teach basics of programming as an introduction to computer science (e.g., including how numbers/strings/characters are represented, using procedures and arrays, control flow, a little bit of algorithms, only very basic I/O). The non-negotiable requirements for this project are: a free up-to-date cross-platform IDE (Win & Mac incl. 64-bit) with debug a compiler where it's easy to learn from your mistakes together with the IDE, a gentle installation+learning curve So far, the best options I see are the following. Are there others I should know about? I am giving a short explanation with each one to generally show what I am looking for. In order from most to least promising: Pascal + FreePascal IDE (it seems a little buggy but actively developed?) Python + Eclipse + PyDev (good but features are overwhelming/hard to navigate) Groovy + Eclipse ('') Python + IDLE (looks unnatural to do debugging, to me) Pascal + Lazarus (IDE overwhelming, e.g. not obvious how to "start from scratch") Preferably, as a rule of thumb, the language should be direct enough that you don't need to wrap every program in a class, don't need to reference a System object to println, etc. I tried a little bit to see if there is something in JavaScript or (non-Visual) Basic along the lines of what I want, but found nothing so far. I would say that C/C++/C#, Java, Ruby, Lisp, VB do not fit my criteria for languages for this project. To reiterate my questions: are any of those 5 options really awesome or un-awesome? Are there other options which are even MORE awesome? Anything for Basic or JavaScript which meets all of the criteria? Thanks!

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