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  • Logic in Entity Components Sytems

    - by aaron
    I'm making a game that uses an Entity/Component architecture basically a port of Artemis's framework to c++,the problem arises when I try to make a PlayerControllerComponent, my original idea was this. class PlayerControllerComponent: Component { public: virtual void update() = 0; }; class FpsPlayerControllerComponent: PlayerControllerComponent { public: void update() { //handle input } }; and have a system that updates PlayerControllerComponents, but I found out that the artemis framework does not look at sub-classes the way I thought it would. So all in all my question here is should I make the framework aware of subclasses or should I add a new Component like object that is used for logic.

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  • How to find optimal path visit every node with parallel workers complicated by dynamic edge costs?

    - by Aaron Anodide
    Say you have an acyclic directed graph with weighted edges and create N workers. My goal is to calculate the optimal way those workers can traverse the entire graph in parralel. However, edge costs may change along the way. Example: A -1-> B A -2-> C B -3-> C (if A has already been visited) B -5-> C (if A has not already been visited) Does what I describe lend itself to a standard algorithmic approach, or alternately can someone suggest if I'm looking at this in an inherently flawed way (i have an intuition I might be)?

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  • Are nested classes under-rated?

    - by Aaron Anodide
    I'm not trying to say I know something everyone else doesn't but I've been solving more and more designs with the use of nested classes, so I'm curious to get a feeling for the acceptablilty of using this seemingly rarely used design mechanism. This leads me to the question: am I going down an inherintly bad path for reasons I'll discover when they come back to bite me, or are nested classes maybe something that are underrated? Here are two examples I just used them for: https://gist.github.com/3975581 - the first helped me keep tightly releated heirarchical things together, the second let me give access to protected members to workers...

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  • iPhone UIButton addTarget:action:forControlEvents: not working

    - by Aaron Vegh
    I see there are similar problems posted here, but none of the solutions work for me. Here goes: I have a UIButton instance inside a UIView frame, which is positioned within another UIView frame, which is positioned in the main window UIView. To wit: UIWindow --> UIView (searchView) --> UISearchBar (findField) --> UIView (prevButtonView) --> UIButton (prevButton) --> UIView (nextButtonView) --> UIButton (nextButton) So far, so good: everything is laid out as I want it. However, the buttons aren't accepting user input of any kind. I am using the UIButton method addTarget:action:forControlEvents: and to give you an idea of what I'm doing, here's my code for nextButton: nextButton = [UIButton buttonWithType:UIButtonTypeCustom]; [nextButton setImage:[UIImage imageNamed:@"find_next_on.png"] forState:UIControlStateNormal]; [nextButton setImage:[UIImage imageNamed:@"find_next_off.png"] forState:UIControlStateDisabled]; [nextButton setImage:[UIImage imageNamed:@"find_next_off.png"] forState:UIControlStateHighlighted]; [nextButton addTarget:self action:@selector(nextResult:) forControlEvents:UIControlEventTouchUpInside]; The method nextResult: never gets called, the state of the button doesn't change on touching, and there's not a damned thing I've been able to do to get it working. I assume that there's an issue with all these layers of views: maybe something is sitting on top of my button, but I'm not sure what it could be. In the interest of information overload, I found a bit of code that would print out all my view info. This is what I get for my entire view hierarchy: UIWindow {{0, 0}, {320, 480}} UILayoutContainerView {{0, 0}, {320, 480}} UINavigationTransitionView {{0, 0}, {320, 480}} UIViewControllerWrapperView {{0, 64}, {320, 416}} UIView {{0, 0}, {320, 416}} UIWebView {{0, 44}, {320, 416}} UIScroller {{0, 0}, {320, 416}} UIImageView {{0, 0}, {54, 54}} UIImageView {{0, 0}, {54, 54}} UIImageView {{0, 0}, {54, 54}} UIImageView {{0, 0}, {54, 54}} UIImageView {{-14.5, 14.5}, {30, 1}} UIImageView {{-14.5, 14.5}, {30, 1}} UIImageView {{0, 0}, {1, 30}} UIImageView {{0, 0}, {1, 30}} UIImageView {{0, 430}, {320, 30}} UIImageView {{0, 0}, {320, 30}} UIWebDocumentView {{0, 0}, {320, 21291}} UIView {{0, 0}, {320, 44}} UISearchBar {{10, 8}, {240, 30}} UISearchBarBackground {{0, 0}, {240, 30}} UISearchBarTextField {{5, -2}, {230, 31}} UITextFieldBorderView {{0, 0}, {230, 31}} UIPushButton {{205, 6}, {19, 19}} UIImageView {{10, 8}, {15, 15}} UILabel {{30, 7}, {163, 18}} UIView {{290, 15}, {23, 23}} UIButton {{0, 0}, {0, 0}} UIImageView {{-12, -12}, {23, 23}} UIView {{260, 15}, {23, 23}} UIButton {{0, 0}, {0, 0}} UIImageView {{-12, -12}, {23, 23}} UINavigationBar {{0, 20}, {320, 44}} UINavigationButton {{267, 7}, {48, 30}} UIImageView {{0, 0}, {48, 30}} UIButtonLabel {{11, 7}, {26, 15}} UINavigationItemView {{79, 8}, {180, 27}} UINavigationItemButtonView {{5, 7}, {66, 30}} MBProgressHUD {{0, 0}, {320, 480}} UIActivityIndicatorView {{141, 206}, {37, 37}} UILabel {{117, 247}, {86, 27}} The relevant part is noted above the UINavigationBar section. Anyone have any suggestions? I'm all out. Thanks for reading. Aaron.

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  • Silverlight recursivly bind Treeview to XDocument

    - by Michael Wagner
    How can I recursivly bind a Treeview to an XDocument, mapping each XML Element to a Node in the Treeview? The code below should work from my perspective (and also according to the very few posts I found regarding direct binding), however it does not: <sdk:TreeView ItemsSource="{Binding Path=Elements}" DataContext="{Binding Path=Data}"> <sdk:TreeView.ItemTemplate> <data:HierarchicalDataTemplate ItemsSource="{Binding Path=Elements}"> <StackPanel Orientation="Vertical"> <TextBlock Text="{Binding Name}"/> </StackPanel> </data:HierarchicalDataTemplate> </sdk:TreeView.ItemTemplate> </sdk:Treeview> (Data is a Property of type XElement on the parents' DataContext) Did I make a mistake somewhere or do I really need to implement an IValueConverter just to get at the child elements of an XElement?

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  • Joomla Admin module in "New Article" form?

    - by Honus Wagner
    In Joomla 1.5, I am interested in developing a fairly simple module that I was hoping would live on the right side of the create new article page. I've created a handful of modules before, one on the admin page at the dashboard that is on the right side that you click to expand/collapse. So, can I create a module that I could attach to any new article form on the right side, somewhere under "advanced settings" or something? Thanks.

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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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  • fast, clean, C, timsort implementation?

    - by Drew Wagner
    Does anyone know of a clean implementation of timsort? The Python sources contain a description and code for the original timsort, but it is understandably full of python-specific calls. I have a smoothly varying 2D array of double floats that I would like to sort as quickly as possible. It ought to contain a lot of monotonically increasing and decreasing runs. I'd like to try timsorting the rows individually, and then merging the sorted rows. If you know of a better sort technique, I'm open to suggestions. Thanks!

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  • Nested/Child TransactionScope Rollback

    - by Robert Wagner
    I am trying to nest TransactionScopes (.net 4.0) as you would nest Transactions in SQL Server, however it looks like they operate differently. I want my child transactions to be able to rollback if they fail, but allow the parent transaction to decide whether to commit/rollback the whole operation. A greatly simplified example of what I am trying to do: static void Main(string[] args) { using(var scope = new TransactionScope()) // Trn A { // Insert Data A DoWork(true); DoWork(false); // Rollback or Commit } } // This class is a few layers down static void DoWork(bool fail) { using(var scope = new TransactionScope()) // Trn B { // Update Data A if(!fail) { scope.Complete(); } } } I can't use the Suppress or RequiresNew options as Trn B relies on data inserted by Trn A. If I do use those options, Trn B is blocked by Trn A. Any ideas how I would get it to work, or if it is even possible using the System.Transactions namespace? Thanks

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  • Does .NET have a built in IEnumerable for multiple collections?

    - by Bryce Wagner
    I need an easy way to iterate over multiple collections without actually merging them, and I couldn't find anything built into .NET that looks like it does that. It feels like this should be a somewhat common situation. I don't want to reinvent the wheel. Is there anything built in that does something like this: public class MultiCollectionEnumerable<T> : IEnumerable<T> { private MultiCollectionEnumerator<T> enumerator; public MultiCollectionEnumerable(params IEnumerable<T>[] collections) { enumerator = new MultiCollectionEnumerator<T>(collections); } public IEnumerator<T> GetEnumerator() { enumerator.Reset(); return enumerator; } IEnumerator IEnumerable.GetEnumerator() { enumerator.Reset(); return enumerator; } private class MultiCollectionEnumerator<T> : IEnumerator<T> { private IEnumerable<T>[] collections; private int currentIndex; private IEnumerator<T> currentEnumerator; public MultiCollectionEnumerator(IEnumerable<T>[] collections) { this.collections = collections; this.currentIndex = -1; } public T Current { get { if (currentEnumerator != null) return currentEnumerator.Current; else return default(T); } } public void Dispose() { if (currentEnumerator != null) currentEnumerator.Dispose(); } object IEnumerator.Current { get { return Current; } } public bool MoveNext() { if (currentIndex >= collections.Length) return false; if (currentIndex < 0) { currentIndex = 0; if (collections.Length > 0) currentEnumerator = collections[0].GetEnumerator(); else return false; } while (!currentEnumerator.MoveNext()) { currentEnumerator.Dispose(); currentEnumerator = null; currentIndex++; if (currentIndex >= collections.Length) return false; currentEnumerator = collections[currentIndex].GetEnumerator(); } return true; } public void Reset() { if (currentEnumerator != null) { currentEnumerator.Dispose(); currentEnumerator = null; } this.currentIndex = -1; } } }

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  • fastest way to sort the entries of a "smooth" 2D array

    - by Drew Wagner
    What is the fastest way to sort the values in a smooth 2D array? The input is a small filtered image: about 60 by 80 pixels single channel single or double precision float row major storage, sequential in memory values have mixed sign piecewise "smooth", with regions on the order of 10 pixels wide Output is a flat (about 4800 value) array of the sorted values, along with the indices that sort the original array.

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  • A PHP script to stream internet radio?

    - by Honus Wagner
    I've been searching and searching and I haven't yet come up with a solution to host my own streaming audio player. I'm looking for a way to host an internet radio player that connects to whatever streams I enter in and plays them. I'm not looking to play my MP3s or anything like that. I'm looking to play content from 181.fm or 1Club.fm, for example. I'd even settle for ShoutCast-only streams. I've been to www.wavestreaming.com but it didnt work for me. I'm guessing its because in the very first box where you enter your website url, it leads in for you: http//www. then you fill in the rest. My site is https:// and does not contain a www. in the URL. I'm guessing that has something to do with it. Any links, suggestions for search topics, or even a brief technical overview of what I should be looking into would be greatly appreciated. Thanks for your time.

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  • PHP: optimum configuration storage ?

    - by Jerome WAGNER
    Hello, My application gets configured via a lot of key/values (let's say 30.000 for instance) I want to find the best deployment method for these configurations, knowing that I want to avoid DEFINEs to allow for runtime re-configuration. I have thought of - pre-compiling them into an array via a php file - pre-compiling them into a tmpfs sqlite database - pre-compiling them into a memcached db what are my options for the best random access time to these configuration (memory is not an issue) ? Thanks Jerome

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  • Persisting complex data between postbacks in ASP.NET MVC

    - by Robert Wagner
    I'm developing an ASP.NET MVC 2 application that connects to some services to do data retrieval and update. The services require that I provide the original entity along with the updated entity when updating data. This is so it can do change tracking and optimistic concurrency. The services cannot be changed. My problem is that I need to somehow store the original entity between postbacks. In WebForms, I would have used ViewState, but from what I have read, that is out for MVC. The original values do not have to be tamper proof as the services treat them as untrusted. The entities would be (max) 1k and it is an intranet app. The options I have come up are: Session - Ruled out - Store the entity in the Session, but I don't like this idea as there are no plans to share session between URL - Ruled out - Data is too big HiddenField - Store the serialized entity in a hidden field, perhaps with encryption/encoding HiddenVersion - The entities have a (SQL) version field on them, which I could put into a hidden field. Then on a save I get "original" entity from the services and compare the versions, doing my own optimistic concurrency. Cookies - Like 3 or 4, but using a cookie instead of a hidden field I'm leaning towards option 4, although 3 would be simpler. Are these valid options or am I going down the wrong track? Is there a better way of doing this?

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  • WebOrb - Serializing an object as a string

    - by Robert Wagner
    We have an Adobe Flex client talking to a .NET server using WebORB. Simplifying things, on the .NET side of things we have a struct that wraps a ulong like this: public struct MyStruct { private ulong _val; public override string ToString() { return _val.ToString("x16"); } // Parse method } I want the Flex client to treat this as a string. So that for the following server method: public void DoStuff(int i, MyStruct b); It can call it as DoStuff(1, "1234567890ABCDEF") I've tried playing with custom WebORB serializers, but the documentation is a bit scarce. Is this possible? If so how?

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  • Application doesn't exit with 0 threads

    - by Bryce Wagner
    We have a WinForms desktop application, which is heavily multithreaded. 3 threads run with Application.Run and a bunch of other background worker threads. Getting all the threads to shut down properly was kind of tricky, but I thought I finally got it right. But when we actually deployed the application, users started experiencing the application not exiting. There's a System.Threading.Mutex to prevent them from running the app multiple times, so they have to go into task manager and kill the old one before they can run it again. Every thread gets a Thread.Join before the main thread exits, and I added logging to each thread I spawn. According to the log, every single thread that starts also exits, and the main thread also exits. Even stranger, running SysInternals ProcessExplorer show all the threads disappear when the application exits. As in, there are 0 threads (managed or unmanaged), but the process is still running. I can't reproduce this on any developers computers or our test environment, and so far I've only seen it happen on Windows XP (not Vista or Windows 7 or any Windows Server). How can a process keep running with 0 threads?

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  • How to remove lowercase sentence fragments from text?

    - by Aaron
    Hello: I'm tyring to remove lowercase sentence fragments from standard text files using regular expresions or a simple Perl oneliner. These are commonly referred to as speech or attribution tags, for example - he said, she said, etc. This example shows before and after using manual deletion: Original: "Ah, that's perfectly true!" exclaimed Alyosha. "Oh, do leave off playing the fool! Some idiot comes in, and you put us to shame!" cried the girl by the window, suddenly turning to her father with a disdainful and contemptuous air. "Wait a little, Varvara!" cried her father, speaking peremptorily but looking at them quite approvingly. "That's her character," he said, addressing Alyosha again. "Where have you been?" he asked him. "I think," he said, "I've forgotten something... my handkerchief, I think.... Well, even if I've not forgotten anything, let me stay a little." He sat down. Father stood over him. "You sit down, too," said he. All lower case sentence fragments manually removed: "Ah, that's perfectly true!" "Oh, do leave off playing the fool! Some idiot comes in, and you put us to shame!" "Wait a little, Varvara!" "That's her character," "Where have you been?" "I think," "I've forgotten something... my handkerchief, I think.... Well, even if I've not forgotten anything, let me stay a little." He sat down. Father stood over him. "You sit down, too," I've changed straight quotes " to balanced and tried: ” (...)+[.] Of course, this removes some fragments but deletes some text in balanced quotes and text starting with uppercase letters. [^A-Z] didn't work in the above expression. I realize that it may be impossible to achieve 100% accuracy but any useful expression, perl, or python script would be deeply appreciated. Cheers, Aaron

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  • ShoutCast over SSL

    - by Honus Wagner
    So I've gone ahead and set up my ShoutCast server DNAS and set my DSP in Winamp on my host computer. The server listens on port 8000, so per some instructions I installed an output plugin for winamp (Shoutcast DSP) and used 8000 and the password to connect. Server accepts the connection. Now, what the heck do I do now? My host computer is SSL secured and the DNAS server is installed within the secure web directory (if that matters). My desired end result is that I want to listen to my ShoutCast setup at home (host computer) from any computer. I try browsing to my ip address and port 8000 (without using HTTPS) and it comes back with nothing. If I browse with HTTPS://my.server.com:8000, I get Error code: ssl_error_rx_record_too_long) Have I completely missed something, or am I just a total moron? Thanks.

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  • MEF part unable to import Autofac autogenerated factory

    - by Michael Wagner
    This is a (to me) pretty weird problem, because it was already running perfectly but went completely south after some unrelated changes. I've got a Repository which imports in its constructor a list of IExtensions via Autofacs MEF integration. One of these extensions contains a backreference to the Repository as Lazy(Of IRepository) (lazy because of the circular reference that would occur). But as soon as I try to use the repository, Autofac throws a ComponentNotRegisteredException with the message "The requested service 'ContractName=Assembly.IRepository()' has not been registered." That is, however, not really correct, because when I break right after the container-build and explore the list of services, it's there - Exported() and with the correct ContractName. I'd appreciate any help on this... Michael

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  • Setting the Identity/Principal from a MessageInspector in WCF

    - by Robert Wagner
    I am developing a WCF service that receives the user's credentials in the SOAP header. These credentials are read on the server side using a MessageInspector. So far so good. I want to set the Thread.CurrentPrincipal to a custom principal (CustomPrincipal), but when I do this from the MessageInspector, it gets overridden by the time the service is invoked. When is the best time to set the principal? Also what is the best way to pass the principal, identity or credentials from the inspector to that location?

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  • Can Gobby/Sobby be used for collaborative edition for a team of developers ?

    - by Jerome WAGNER
    Hello, Gobby/Sobby is an open source client/server for collaborative edition of plain text file (source code). My question is 4-fold : Can you share any real-life usage of Gobby/Sobby for development among a group of physically separated developers ? Is the project mature enough as a productivity tool ? What are the working use cases ? What versions should be used ? (It seems 'undo' feature is not yet officially packaged) Thanks Jerome

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