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Articles indexed in March 2010

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  • Get value of "data"

    - by Nicole Loyal-Windham
    Hi, I need to figure out the value of data strings with jquery, for example like this: { label: "Beginner", data: 2}, { label: "Advanced", data: 12}, { label: "Expert", data: 22}, to add them up. Something like: var sum = data1+data2+data3; alert(sum); So the result for this example would be 36. Appreciate your help! Nicole

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  • dyld: Library not loaded error when running command in terminal

    - by Denis
    Hi, When running some commands in the terminal, I get the following error message dyld: Library not loaded: /opt/local/lib/libjpeg.62.dylib Referenced from: /opt/local//lib/libTIFF.dylib Reason: no suitable image found. Did find: /opt/local//lib/libjpeg.62.dylib: can't map /opt/local/lib/libjpeg.62.dylib: can't map Trace/BPT trap fyi my xcode is up to date Any idea how to understand and fix this problem? Thanks

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  • Django: getting the list of related records for a list of objects

    - by Silver Light
    Hello! I have two models related one-to many: class Person(models.Model): name = models.CharField(max_length=255); surname = models.CharField(max_length=255); age = models.IntegerField(); class Dog(models.Model): name = models.CharField(max_length=255); owner = models.ForeignKey('Person'); I want to output a list of persons below each person a list of dogs he has. Here's how I can do it: in view: persons = Person.objects.all()[0:100]; in template: {% for p in persons %} {{ p.name }} has dogs:<br /> {% for d in persons.dog_set.all %} - {{ d.name }}<br /> {% endfor %} {% endfor %} But if I do it like that, Django will execute 101 SQL queries which is very inefficient. I tried to make a custom manager, which will get all the persons, then all the dogs and links them in python, but then I can't use paginator (my another question: http://stackoverflow.com/questions/2532475/django-paginator-raw-sql-query ) and it looks quite ugly. Is there a more graceful way doing this?

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  • The Next-gen Databases

    - by Randin
    I'm learning traditional Relational Databases (with PostgreSQL) and doing some research I've come across some new types of databases. CouchDB, Drizzle, and Scalaris to name a few, what is going to be the next database technologies to deal with?

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  • How to implement this mechanism:

    - by Sorush Rabiee
    Hi i want to implement a dynamic relation mechanism with python something like: a:=10 b:=30 c:=a+b print c a+=20 print c output: 40 60 c is always result of a+b. so if a or b change, then c automatically updates value. i write a code in C# and do this by set and get mechanism. now want to translate it to python code for using in another program (FontLab Studio 5). I'm not so familiar with Python. does he have a get,set feature like C#? if not ho to implement one?

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  • Groovy list.sort by first, second then third elements

    - by Ying
    Hi, I have a groovy list of lists i.e. list = [[2, 0, 1], [1, 5, 2], [1, 0, 3]] I would like sort it by order of the first element, then second, then third. Expected assert list == [[1, 0, 3], [1, 5, 2], [2, 0, 1]] I started with list = list.sort{ a,b -> a[0] <=> b[0] } but that only sorts the first element. How do you finish? Thanks

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  • Sanitize a string with non-alphanum repetition

    - by Toto
    I need to sanitize article titles when (creative) users try to "attract attention" with some non-alphanum repetition. Exemples: Buy my product !!!!!!!!!!!!!!!!!!!!!!!! Buy my product !? !? !? !? !? !? Buy my product !!!!!!!!!.......!!!!!!!! Buy my product <----------- Some acceptable solution would be to reduce the repetition of non-alphanum to 2. So I would get: Buy my product !! Buy my product !? !? Buy my product !!..!! Buy my product <-- This solution did not work that well: preg_replace('/(\W{2,})(?=\1+)/', '', $title) Any idea how to do it in PHP with regex? Other better solution is also welcomed (I cannot strip all the non-alphanum characters as they can make sense). Edit: the objective is only to avoid most common issues. The other creative cases will be sanitized manually or sanitized with an other regex.

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  • non-class rvalues always have cv-unqualified types

    - by FredOverflow
    §3.10 section 9 says "non-class rvalues always have cv-unqualified types". That made me wonder... int foo() { return 5; } const int bar() { return 5; } void pass_int(int&& i) { std::cout << "rvalue\n"; } void pass_int(const int&& i) { std::cout << "const rvalue\n"; } int main() { pass_int(foo()); // prints "rvalue" pass_int(bar()); // prints "const rvalue" } According to the standard, there is no such thing as a const rvalue for non-class types, yet bar() prefers to bind to const int&&. Is this a compiler bug? EDIT: Apparently, this is also a const rvalue :)

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  • Linux embeddable cheap rack server..

    - by Harun ESUR
    I want to embed my network connectivity application into a linux installed rack-mount server and sell it bundled. I googled some but couldn't figured out which it would be? Do you have any experiences with these types of hardware and recommend some?

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  • Using Apple TV as default output sound device

    - by Török Gábor
    I have an OS X box running iTunes on it. I play music with iTunes connected to an Apple TV. In iTunes I can select Apple TV as the output sound device. Am I able to do that with any other application? Apple TV does not show up as a seperate device in System Preferences. I'd like to browse and play YouTube videos in my computer and stream their sound to Apple TV.

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  • compiling boost based application using cron

    - by user303544
    Hi All, I am building some boost based application for various embedded targets. I have developed a script which can build my application with different toolchain for several targets. This script works fine when I run it from command line but if it is invoked from cron it always fails to link the object files. My application has dependency on openssl. Can anyone please give some idea? What would be the root cause of this kind of behavior? Thanks in advance.

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  • How to automatically include a number of images in the SWF file?

    - by Ponty
    Hi, i'm trying to include a number of images in my SWF file not by loading them but by embedding them in the SWF itself. I found the following instruction to do that: [Embed(source="../graphics/images/ss0.png")] private var SS0:Class; Basically, i want to embed a different number of images each time. Is there a way to do that automatically (let's say inside a for loop) or do i have to type manually this instruction for each image i want to include?

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  • How to implement "tab drop in window" and "tab drop out of window" effect

    - by stanleyxu2005
    How to implement "tab drop in window" and "tab drop out of window" effect, just like the google chrome browser? My imagination is that: It is not a single application. The main browser frame is an application, the tabs are several applications without a window frame. When the main browser frame is resized or moved, all tabs will be notified to be resized or moved. Is there any existing component or code example can do this?

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  • Visual Studio Talk Show #116 is now online - Les nouveautés de la conférence MIX 2010 (French)

    - by guybarrette
    http://www.visualstudiotalkshow.com Laurent Duveau: Les nouveautés de la conférence MIX 2010 Nous discutons avec Laurent Duveau des nouveautés annoncées dans le cadre de la conférence MIX 2010 à laquelle Laurent a assisté. MIX est une conférence tenue annuellement pour les développeurs et les designers Web qui présente les dernières nouveautés produites par Microsoft pour la programmation Internet. Laurent Duveau est un consultant et formateur pour la firme RunAtServer Consulting. Il se spécialise dans un domaine qu'il adore: les applications web avec Silverlight et l'outillage Microsoft Expression. Laurent est certifié MCSD.NET, MCTS, MCPD et MCT. Il participe fréquemment aux activités de la Communauté .NET de Montréal. Il est également l'auteur d'articles techniques pour TechHeadBrothers et asp.net et contribue activement aux forums asp.net. Pour la quatrième année consécutive, il a obtenu de Microsoft le titre de MVP. Et cette année, il est parmi les premiers récipiendaire de la reconnaissance MVP Silverlight. Suivez son blog ou il écrit sur les nouveautés de Silverlight. Télécharger l'émission Si vous désirez un accès direct au fichier audio en format MP3, nous vous invitons à télécharger le fichier en utilisant un des boutons ci-dessous. Si vous désirez utiliser le feed RSS pour télécharger l'émission, nous vous invitons à vous abonnez en utilisant le bouton ci-dessous. Si vous désirez utiliser le répertoire iTunes Podcast pour télécharger l'émission, nous vous encourageons à vous abonnez en utilisant le bouton ci-dessous. var addthis_pub="guybarrette";

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  • InvokeRequired not reliable?

    - by marocanu2001
    InvalidOperationException: Cross-thread operation not valid: Control 'progressBar' accessed from a thread other than the thread it was created ... Now this is not a nice way to start a day! not even if it's a Monday! So you have seen this and already thought, come on, this is an old one, just ask whether InvokeRequired before calling the method in the control, something like this: if (progressBar.InvokeRequired) {           progressBar.Invoke  ( new MethodInvoker( delegate {  progressBar.Value = 50;    }) ) }else      progressBar.Value = 50;    Unfortunately this was not working the way I would have expected, I got this error, debugged and though in debugging the InvokeRequired had become true , the error was thrown on the branch that did not required Invoke. So there was a scenario where InvokeRequired returned false and still accessing the control was not on the right thread ... Problem was that I kept showing and hiding the little form showing the progressbar. The progressbar was updating on an event  , ProgressChanged and I could not guarantee the little form was loaded by the time the event was thrown. So , spotted the problem, if none of the parents of the control you try to modify is created at the time of the method invoking, the InvokeRequired returns true! That causes your code to execute on the woring thread. Of course, updating UI before the win dow was created is not a legitimate action either, still I would have expected a different error. MSDN: "If the control's handle does not yet exist, InvokeRequired searches up the control's parent chain until it finds a control or form that does have a window handle. If no appropriate handle can be found, the InvokeRequired method returns false. This means that InvokeRequired can return false if Invoke is not required (the call occurs on the same thread), or if the control was created on a different thread but the control's handle has not yet been created." Have  a look at InvokeRequired's implementation: public bool InvokeRequired {     get     {         HandleRef hWnd;         int lpdwProcessId;         if (this.IsHandleCreated)         {             hWnd = new HandleRef(this, this.Handle);         }         else         {             Control wrapper = this.FindMarshallingControl();             if (!wrapper.IsHandleCreated)             {                 return false; // <==========             }             hWnd = new HandleRef(wrapper, wrapper.Handle);         }         int windowThreadProcessId = SafeNativeMethods.GetWindowThreadProcessId(hWnd, out lpdwProcessId);         int currentThreadId = SafeNativeMethods.GetCurrentThreadId();         return (windowThreadProcessId != currentThreadId);     } } Here 's a good article about this and a workaround http://www.ikriv.com/en/prog/info/dotnet/MysteriousHang.html

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  • Voice on 4G Technologies such as LTE and WiMAX?

    - by Vaibhav Bajpai
    I understand that LTE and WiMAX are IP-based technologies that do NOT have a voice component unlike the current 3G technologies. So is it like, voice calls in 4G would be completely driven on top of IP? Wouldn't this break backward compatibility with existing 3G technologies? Is this why 4G is taking it took long to take ubiquitous availability?

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  • "Windows was unable to complete the format" - Can't format flashdrive!!!

    - by Jake
    I have a 8GB Sandisk Cruzer USB flash drive that I had ruined a while back trying to make it bootable. Anyway now when I click on it I get a message that it needs to be reformatted to be used. So when I try to do that, the formatting starts and suddenly ends with the message "Windows was unable to complete the format". This happens no matter which file system I choose (NTFS, FAT32, exFat) and also which computer I try this on. I am now on a Windows 7 32 bit OS and before tries it on a Vista Home Basic machine. Anyone know any way around this issue? Many thanks.

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  • if SWFupload running, on tab change alert… idTabs jquery

    - by robertdd
    I use idTabs, in the first tab I have swfuploading, if i have to upload 30 images and i want to change the tab, while uploading, the upload stop! how can I call a function only if swfupload make upload, to alert the client? this function is called when a tab is clicked $(function(){ $(".usual ul a").click(function(){ alert('aaa'); }); }); thanks!

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  • iCal Organizer Issue

    - by mnour
    I'm trying to create an ICS file and send it to myself. I set myself as the organizer of the event. The appointment request is properly received to my mail box but the event is not automatically added to my calendar. I'm using Outlook 2007. Here is the iCal file format: BEGIN:VCALENDAR METHOD:REQUEST BEGIN:VEVENT ATTENDEE;CN=""Mohammed Noureldine"";RSVP=TRUE:mailto:[email protected] CLASS:PUBLIC CREATED:20100325T142515Z DESCRIPTION:\n DTEND:20100325T213000Z DTSTAMP:20100325T142426Z DTSTART:20100325T210000Z LAST-MODIFIED:20100331T142515Z LOCATION:test ORGANIZER;CN=""Mohammed Noureldine"":mailto:[email protected] PRIORITY:5 SEQUENCE:0 BEGIN:VALARM TRIGGER:-PT15M ACTION:DISPLAY DESCRIPTION:Reminder END:VALARM END:VEVENT END:VCALENDAR

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