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  • Is ajax + comet + asp.net scalable ?

    - by pixel3cs
    Thinks at a backgammon online multiplayer game with over 100, or even 1000 online users. The game communication is done using Ajax + 3 seconds Comet connection interval + ASP.NET technology. Is this a real scenario ? Didn't so many Comet open connections block the server resulting in big latency ?

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  • Replacement for java.util.zip for streaming usage?

    - by evilfred
    java.util.zip sucks for stream compression. The longer you leave an Inflator/Deflator open without calling end(), the more native memory it uses up. This is a known issue: http://bugs.sun.com/view_bug.do?bug_id=4797189 which nobody seems to care about fixing. What is a good alternative? Preferably one that is free and is still actively supported by its developers.

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  • Undefined namespace prefix in Nokogiri and XPath

    - by ???? ???????
    I am trying to parse Youtube Gdata to see if video with given id exists. But there isn't normal tag but with namespace. On the link http://gdata.youtube.com/feeds/api/videos?q=KgfdlZuVz7I there is tag: <openSearch:totalResults>1</openSearch:totalResults> There is namespace openSearch: xmlns:openSearch='http://a9.com/-/spec/opensearchrss/1.0/' but I dont know how to deal with it in Nokogiri and Ruby. Here is part of code: xmlfeed = Nokogiri::HTML(open("http://gdata.youtube.com/feeds/api/videos?q=#{video_id}")) xmlfeed.at_xpath("openSearch:totalResults") It gives error: Undefined namespace prefix: openSearch:totalResults

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  • REBOL: How to do another task while waiting an alarm to trigger ?

    - by Rebol Tutorial
    So I have created an alarm function: alarm: func[seconds message [string! unset!]][ wav: load %attention.wav sound-port: open sound:// wait seconds do [ insert sound-port wav wait sound-port close sound-port if (value? 'message) [ print message ] ] ] which works like this: alarm 30 "Will trigger in 30 seconds" Now how can I for example show a timer which increments while waiting for the alarm since Rebol doesn't support thread ?

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  • Compare date from database and in program

    - by Simon
    database = new OleDbConnection(connectionString); database.Open(); date = DateTime.Now.ToShortDateString(); string queryString = "SELECT SUM(skupaj_kalorij)as Skupaj_Kalorij " + "FROM (obroki_save LEFT JOIN users ON obroki_save.ID_uporabnika=users.ID)" + "WHERE users.ID= " + a.ToString()+" AND obroki_save.datum= " +DateTime.Today.ToShortDateString(); loadDataGrid2(queryString); I get an error,when i wan't to select the result. Why?

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  • Direct link to App Store on iPad?

    - by zoul
    Hello! Is there an URL that will directly open an application in the App Store on the iPad without redirecting through Safari? I am interested in http:// links, not itms://, as I want them to be usable outside the device. The phobos links used on iPhone do not seem to work on the iPad.

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  • Magentoo add slashes to file_name

    - by Kein
    I try extend an core class. But catch error: Warning: include( \\\\\\\\\\\\MyModule\Ajaxsearch\Model\Resource\Eav\Mysql4\Product\Collection \\\\\\\\\\.php) [function.include]: failed to open stream:... Why magento add slashes to addres? May be config error?

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  • QR code - where can I find (free) code to embed my own generator on a web page?

    - by Robbert Huisman
    Hi, couldn't find it exactly from earlier questions, but I am probably repeating an earlier question, so apologies upfront ;-) I am looking for a simple code to embed a QR 2D code generator on a website I am building. I assume their should be some free open source code for that but I could only find paid software. Can anyone point me in the right direction? would be mostly appreciated! best regards, Robbert

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  • Javascript setInterval and `this` solution

    - by Michael
    I need to access this from my setInterval handler prefs: null, startup : function() { // init prefs ... this.retrieve_rate(); this.intervalID = setInterval(this.retrieve_rate, this.INTERVAL); }, retrieve_rate : function() { var ajax = null; ajax = new XMLHttpRequest(); ajax.open('GET', 'http://xyz.com', true); ajax.onload = function() { // access prefs here } } How can I access this.prefs in ajax.onload ?

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  • How to implement automatic replacement of typos in Delphi2010

    - by sum1stolemyname
    I am looking for a way to develop a plugin for Delphi 2010IDE and have yet to find any information on that topic, not even on how to get started. What I want to accomplish is some kind of auto-spellchecker wich can be given a list of common typos (flase instead of false, .cerate instead of .create and the like) and replace them with the intended word. Do you know of a tutorial on plugin development, or maybe an open source plugin which i could base my work on?

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  • What tools do you use to share knowledge amongst developers in your company?

    - by Chris Ross
    I'm looking for some good tools that help to share tips, best practices, company standards, etc. amongs developers in my company. Two tools I'm currently considering are a wiki (screwturn wiki) or Sharepoint 2010. I'm wondering if there is something better suited to the task, or any input anyone has on this subject. I'd prefer something that's windows based (i.e. runs on IIS, can authenticate users against Active Directory etc) but I am open to anything.

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  • Passing around a SqlConnection

    - by Chris
    I have created a TransactionScope and within the scope various items are created and updated in the database. During this process I make a lot of calls to the database. Originally I opened a SqlConnection in the beginning of the TransactionScope and passed it around to any function that made a DB call then I closed the connection after all the calls are made and before the transaction commits. Is it better to do this or to open and close a connection for each call?

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  • Python f.write() at beginning of file?

    - by kristus
    I'm doing it like this now, but i want it to write at the beginning of the file instead. f = open('out.txt', 'a') # or 'w'? f.write("string 1") f.write("string 2") f.write("string 3") f.close() so that the contenst of out.txt will be: string 3 string 2 string 1 and not (like this code does): string 1 string 2 string 3

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  • how to convince website users to use openid

    - by isolatedIterator
    Perhaps this isn't the best forum for this question. If so, would one of the other child sites be more suitable? I am wondering how to overcome the learning curve of convincing a non-technical bunch of users how and what open id is. how do you convince users that it is a good thing and that they want to use it?

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  • How do I convert a Twitter User ID to a Twitter Username

    - by codyvbrown
    Hi I'm building an app in rails that needs to convert a twitter id into the twitter username. This is the code that pulls the id. url = 'http://twitter.com/' + params[:username] buffer = open(url, 'UserAgent' = 'irb').read @vouched_user_twitter_id = buffer[/\d+(?=.rss)/] How do I use that number to pull the username once i no longer have params. Thanks!

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  • Expression Blend 3, solution not supported

    - by Jova
    I'm trying to open a silverlight 4 application solution in Expression Blend 3. However, Blend says that the solution is not supported. Is there something I'm missing? I'm following an example in the book Microsoft Silverlight 4 Business Application Development.

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