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  • Erlang-style light-weight processes in .NET

    - by alexey
    Is there any way to implement Erlang-style light-weight processes in .NET? I found some projects that implement Erlang messaging model (actors model). For example, Axum. But I found nothing about light-weight processes implementation. I mean multiple processes that run in a context of a single OS-thread or OS-process.

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  • What is holding up HD video conferencing on the web?

    - by Tristan
    What exactly is holding up real-time HD video conferencing on the web? Live, low-latency, video has lots of great applications beyond video chat: for instance, virtual desktops / vnc, remote control of applications, and server-side visualization. So what exactly are the technical barriers that remain? Existing video and remote desktop applications show latency problems are overrated for many applications. Bandwidth for many users now can easily stream 720p and even 1080p. Top-end video conferencing demos already do 1080p

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  • How to pass ctor args in Activator.CreateInstance?

    - by thames
    I need a performance enhanced Activator.CreateInstance() and came across this article by Miron Abramson that uses a factory to create the instance in IL and then cache it. (I've included code below from Miron Abramson's site in case it somehow disappears). I'm new to IL Emit code and anything beyond Activator.CreateInstance() for instantiating a class and any help would be much appreciative. My problem is that I need to create an instance of an object that takes a ctor with a parameter. I see there is a way to pass in the Type of the parameter, but is there a way to pass in the value of the ctor parameter as well? If possible, I would like to use a method similar to CreateObjectFactory<T>(params object[] constructorParams) as some objects I want to instantiate may have more than 1 ctor param. // Source: http://mironabramson.com/blog/post/2008/08/Fast-version-of-the-ActivatorCreateInstance-method-using-IL.aspx public static class FastObjectFactory { private static readonly Hashtable creatorCache = Hashtable.Synchronized(new Hashtable()); private readonly static Type coType = typeof(CreateObject); public delegate object CreateObject(); /// /// Create an object that will used as a 'factory' to the specified type T /// public static CreateObject CreateObjectFactory() where T : class { Type t = typeof(T); FastObjectFactory.CreateObject c = creatorCache[t] as FastObjectFactory.CreateObject; if (c == null) { lock (creatorCache.SyncRoot) { c = creatorCache[t] as FastObjectFactory.CreateObject; if (c != null) { return c; } DynamicMethod dynMethod = new DynamicMethod("DM$OBJ_FACTORY_" + t.Name, typeof(object), null, t); ILGenerator ilGen = dynMethod.GetILGenerator(); ilGen.Emit(OpCodes.Newobj, t.GetConstructor(Type.EmptyTypes)); ilGen.Emit(OpCodes.Ret); c = (CreateObject)dynMethod.CreateDelegate(coType); creatorCache.Add(t, c); } } return c; } } Update to Miron's code from commentor on his post 2010-01-11 public static class FastObjectFactory2<T> where T : class, new() { public static Func<T> CreateObject { get; private set; } static FastObjectFactory2() { Type objType = typeof(T); var dynMethod = new DynamicMethod("DM$OBJ_FACTORY_" + objType.Name, objType, null, objType); ILGenerator ilGen = dynMethod.GetILGenerator(); ilGen.Emit(OpCodes.Newobj, objType.GetConstructor(Type.EmptyTypes)); ilGen.Emit(OpCodes.Ret); CreateObject = (Func<T>) dynMethod.CreateDelegate(typeof(Func<T>)); } }

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  • iPhone SDK: How to generate a random time of day

    - by bigdave
    Hello all, I am having some problems trying to figure out the best way of generating a random time of day. For instance, if I want to choose a random time between the hours of 9am and 5pm, what would be the best way with the least amount of overhead on the device? I guess I need someone to point me in the right direction. Thanks!

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  • What is a good software development plan?

    - by Totophil
    Whilst browsing through answers on SO I came across something that is, in my view, one of the more frequent software development management misconceptions: "[software development] plan is a reasonably detailed description of all the activities you need to undertake". Hence the question: what is good software development plan? Can it be boiled down just to a work breakdown structure; is WBS the single most important thing for a software development plan anyway?

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  • VisualStudio: no debug output

    - by pistacchio
    Hi, I'm trying to debug a C# application. The method: System.Diagnostics.Debug.WriteLine("something"); should do the work, but in the Output window (set to "debug" and with all the options activated) I can't see a single line I'm trying to write. Any idea? Thanks EDIT: I'm using VS2008

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  • Sending the command(s) spawned by xargs to background

    - by PoorLuzer
    I want to know how I can send the command(s) spawned by xargs to background. For example, consider find . -type f -mtime +7 | tee compressedP.list | xargs compress I tried find . -type f -mtime +7 | tee compressedP.list | xargs -i{} compress {} & .. and as unexpected, it seems to send xargs to the background instead? How do I make each instance of the compress command go to the background?

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  • Conditional ESC, ideas?

    - by Tony
    I often need to enter insert mode just to make changes on a specific line, and would like know if there is a way to enter insert mode in a way that when I am done editing on that line, hitting [Return] gets me back to normal mode. I am aware of the 'r' command for replacing a single character, I guess what I want is something like that but for a line.

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  • Bash: Correct way to Iterate over Map

    - by Lars Tackmann
    In Bash I can create a map (hashtable) with this common construction hput() { eval "$1""$2"='$3' } hget() { eval echo '${'"$1$2"'#hash}' } and then use it like this: hput capitols France Paris hput capitols Spain Madrid echo "$(hget capitols France)" But how do I best iterate over the entries in the map ?. For instance, in Java I would do: for (Map.Entry<String, String> entry : capitols.entrySet()) { System.out.println("Country " + entry.getKey() + " capital " + entry.getValue()); } is there a common way of accomplishing something similar in Bash ?.

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  • Amazon EC2 Development Stack

    - by sirmak
    I want to use EC2 for some reasons and EC2 provides both windows and linux deployments, but linux is much cheaper (linux reserved instances are approx. %63-%85 price of windows ones and spot instances are %50 cheaper for linux). I need a type safe lang and mainstream platform and I prefer to use .net/c# stack (but not mono for some reasons), but in this situation java seems a better fit for the future (when ec2 instance counts begin to increase). So, is it worth to use .net ? best regards,

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  • How to create users and view reports in TFS 2010?

    - by afsharm
    Hi, Recently I have installed a new instance of TFS 2010 on a MS Windows 2008. But it seems that some parts in not installed or configured properly. I'm going to define users and roles according to a specific process template but I don't know where I can do this. There is same problems with reports.

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  • Integrate website backend with forum software?

    - by Msencenb
    I am designing a php/mysql website that will have a members are and a separate "forum" section. Should I just use the forum software as my "login/registration"? If this is the case should I go with VBulletin, Invision, phpBB3 or something different? Or should I roll my own single sign on hack? Or something completely different?

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  • Maximum number of concurrent users connected to SQL Server 2008

    - by worlds-apart89
    Is there a limit to the maximum number of concurrent users connected to SQL Server 2008? I am guessing computer resources determine that limit (if it exists), but I am also wondering if there is a theoretical limit. I have tried googling the answer, but all the information I have found is based upon earlier versions of SQL Server. If there is a limit, does it apply to just a database or a SQL Server instance?

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  • Starting ActiveMQ message listener in Tomcat?

    - by Nick Swarr
    I've created an ActiveMQ MessageListener and configured it using Spring. I'm hosting the listener in Tomcat. When I start up the web application (that features only the listener), should the listener automatically start? Or do I need additional configuration? Here's what I have. First, updated the web.xml to allow spring to configure itself on startup, <?xml version="1.0" encoding="UTF-8"?> <web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <context-param> <param-name>contextConfigLocation</param-name> <param-value>/WEB-INF/classes/spring/applicationContext.xml</param-value> </context-param> </web-app> Then I created the applicationContext.xml to configure the ActiveMQ listener, <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context" xmlns:amq="http://activemq.apache.org/schema/core" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd"> <context:annotation-config /> <context:component-scan base-package="com.somepackage"/> <context:property-placeholder location="classpath:env.properties"/> <bean id="jmsFactory" class="org.apache.activemq.ActiveMQConnectionFactory"> <property name="brokerURL" value="tcp://localhost:61616" /> </bean> <bean id="documentListener" class="com.somepackage.SomeListener" /> <bean id="container" class="org.springframework.jms.listener.DefaultMessageListenerContainer"> <property name="connectionFactory" ref="cachingConnectionFactory"/> <property name="messageListener" ref="documentListener"/> <property name="destinationName" value="STOCKS.MSFT" /> </bean> <bean id="cachingConnectionFactory" class="org.springframework.jms.connection.CachingConnectionFactory"> <property name="targetConnectionFactory" ref="jmsFactory" /> <property name="sessionCacheSize" value="1" /> </bean> </beans> And that's it. Based on what I've seen around the web, I can't tell if that's all I need? Maybe I need some other configuration in Tomcat to kick off the listener?

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  • Help with SSh Tunnel [closed]

    - by Andrew Johnson
    I am running a Django instance locally and doing some Facebook development. So, I set up a port on a remote machine to forward to my local machine, so that Facebook can hit the web server, and have the requests forwarded to my local machine. Unfortunately, I'm getting the following error in my browser when I try and access the page: http://dev.thegreathive.com/ Any idea what I'm doing wrong? I think the problem is on my local machine, since if I kill the SSH tunnel, the error message changes.

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  • C# Spell checker Problem

    - by reggie
    I've incorporated spell check into my win forms C# project. This is my code. public void CheckSpelling() { try { // declare local variables to track error count // and information int SpellingErrors = 0; string ErrorCountMessage = string.Empty; // create an instance of a word application Microsoft.Office.Interop.Word.Application WordApp = new Microsoft.Office.Interop.Word.Application(); // hide the MS Word document during the spellcheck //WordApp.WindowState = WdWindowState.wdWindowStateMinimize; // check for zero length content in text area if (this.Text.Length > 0) { WordApp.Visible = false; // create an instance of a word document _Document WordDoc = WordApp.Documents.Add(ref emptyItem, ref emptyItem, ref emptyItem, ref oFalse); // load the content written into the word doc WordDoc.Words.First.InsertBefore(this.Text); // collect errors form new temporary document set to contain // the content of this control Microsoft.Office.Interop.Word.ProofreadingErrors docErrors = WordDoc.SpellingErrors; SpellingErrors = docErrors.Count; // execute spell check; assumes no custom dictionaries WordDoc.CheckSpelling(ref oNothing, ref oIgnoreUpperCase, ref oAlwaysSuggest, ref oNothing, ref oNothing, ref oNothing, ref oNothing, ref oNothing, ref oNothing, ref oNothing, ref oNothing, ref oNothing); // format a string to contain a report of the errors detected ErrorCountMessage = "Spell check complete; errors detected: " + SpellingErrors; // return corrected text to control's text area object first = 0; object last = WordDoc.Characters.Count - 1; this.Text = WordDoc.Range(ref first, ref last).Text; } else { // if nothing was typed into the control, abort and inform user ErrorCountMessage = "Unable to spell check an empty text box."; } WordApp.Quit(ref oFalse, ref emptyItem, ref emptyItem); System.Runtime.InteropServices.Marshal.ReleaseComObject(WordApp); // return report on errors corrected // - could either display from the control or change this to // - return a string which the caller could use as desired. // MessageBox.Show(ErrorCountMessage, "Finished Spelling Check"); } catch (Exception e) { MessageBox.Show(e.ToString()); } } The spell checker works well, the only problem is when I try to move the spell checker the main form blurs up for some reason. Also when I close the spell checker the main form is back to normal. It seems like it is opening up Microsoft word then hiding the window, only allowing the spell checker to be seen. Please help.

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  • PHP: Ideal Folder Structure of MVC framework

    - by Sarfraz
    Hello guys, I would like to ask what is the ideal folder structure for a MVC framework that should be able to support multiple installations. For example, I install xyz framework and i run two or more sites based on this single installation of xyz framework rather than installing the framework for each site. This is probably done in Codeigniter too but i don't know much about CodeIgniter, so i need your suggestions. I know some of you might even have better idea than what is done by CodeIgniter, so please share.

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  • using PHP for "Fluid" design(using viewport resolution)

    - by Jreeter
    I need some opinions on using PHP to make completely "scalable" websites.. For instance, using viewport resolution and resizing images, applying dynamic css styles..... In my mind doing this just add's to the complexity and should not be done, it should be fixed or fluid using strictly css and no server-side languages to generate layouts based on the device size.. I need some input and maybe some philosophy on why using this approach is not used at all..

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  • Packaging Android resource files within a distributable Jar file

    - by Jeff Gilfelt
    I am working on some reusable Android code that I would like to distribute to other developers for use within their own applications. The code has some resource dependencies (layouts, xml & png drawables) that I would like to be able to include and reference within a single package (Jar file). Is this possible, and if so what is the best method to do this?

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  • Deferring frequent updates in MySQL

    - by cdecker
    I have frequent updates to a user table that simply sets the last seen time of a user, and I was wondering whether there is a simple way to defer them and group them into a single query after a short timeout (5 minutes or so). This would reduce queries on my user database quite a lot.

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  • Unless I start Management Studio with "Run as administrator", I get a Login Failure (Error 18456)

    - by MedicineMan
    I cannot connect to the SQL Server instance if I do not start management studio as a administrator. I am running windows 7, SQL Server 2008, and Management Studio 10.0. If I run as a normal user, the error I get is: Cannot connect to .. Additional information: login failed for user 'COMPUTERNAME\MyUserName'. (Microsoft SQL Server, Error 18456) for server name I have tried the following: . localhost COMPUTERNAME

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  • Fullcalendar event rendering

    - by Stian
    I would like to render an event to take up the entire space in a cell. For instance in the month view. Out of the box, the date is displayed on top, and then the event underneath. I want to ignore the date text and display the event over the intire cell, I don't want to hardcode the height of the event. Hope to get some pointers, I have looked everywhere in the javascript and css.

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