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• 500 error on Joolma website

  - by Rachel Sparks

  PHP Fatal error: Call to a member function setQuery() on a non-object in /home/josh/public_html/administrator/components/com_jfusion/plugins/phpbb3/forum.php on line 226 Just moved over to a new server. Anyone have ideas as to what is wrong? Is this a database issue? line 226: //get permissions for all forums in case more than one module/plugin is present with different settings $db = & JFusionFactory::getDatabase($this->getJname()); $query = "SELECT forum_id FROM #__forums WHERE forum_type = 1 ORDER BY left_id"; $db->setQuery($query); //226 $forumids = $db->loadResultArray();

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• "/etc/apache2/mods-enabled/proxy_html.load: Cannot load /usr/lib/libxml2.so.2 into server" error with Apache mod-proxy

  - by hhh

  The command $ sudo apt-get install libapache2-mod-proxy-html and then $sudo service apache2 restart fires: apache2: Syntax error on line 210 of /etc/apache2/apache2.conf: Syntax error on line 1 of /etc/apache2/mods-enabled/proxy_html.load: Cannot load /usr/lib/libxml2.so.2 into server: /usr/lib/libxml2.so.2: cannot open shared object file: No such file or directory Action 'configtest' failed. I am using X220 laptop. Perhaps related thing but ?AMD here. Perhaps some repeating bug in Ubuntu, again. How to fix this? Any patch yet for Ubuntu?

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• Convert rotation from Right handed System to left handed

  - by Hector Llanos

  I have Euler angles from a right handed system that I am trying to convert to a left handed system. All the information that I have read online says that to convert it simply multiply the axis and the angle in the correct order and it should work. In other words, Z * Y * X. When I do this what I see in Maya, and in engine still do not match up. This is what I have so far: static Quaternion ConvertToRightHand(Vector3 Euler) { Quaternion x = Quaternion.AngleAxis(-Euler.x, Vector3.right); Quaternion y = Quaternion.AngleAxis(Euler.y, Vector3.up); Quaternion z = Quaternion.AngleAxis(Euler.z, Vector3.forward); return (z * y * x); } Keeping the -Euler.x helps keep the object pointing up correctly, but when I pass ( 0,0,0) to face in the -z, it faces in the +z. Help :/

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• When should a bullet texture be loaded in XNA?

  - by Bill

  I'm making a SpaceWar!-esque game using XNA. I want to limit my ships to 5 active bullets at any time. I have a Bullet DrawableGameComponent and a Ship DrawableGameComponent. My Ship has an array of 5 Bullet. What is the best way to manage the Bullet textures? Specifically, when should I be calling LoadTexture? Right now, my solution is to populate the Bullet array in the Ship's constructor, with LoadTexture being called in the Bullet constructor. The Bullet objects will be disabled/not visible except when they are active. Does the texture really need to be loaded once for each individual instance of the bullet object? This seems like a very processor-intensive operation. Note: This is a small-scale project, so I'm OK with not implementing a huge texture-management framework since there won't be more than half a dozen or so in the entire game. I'd still like to hear about scalable solutions for future applications, though.

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• jungledisk fails with libnotify error

  - by Angelo

  Has anyone had success getting the jungledisk application to work under Ubuntu? I installed it from the .deb file provided by jungledisk. The install goes fine, but I can't get the "jungle disk desktop" app to launch. It appears in the dash search bar, but doesn't launch or do anything upon selecting it. When I try the command line, I get the following... $ jungledisk -V -f Verbose mode enabled Shutting down... $ I get something more interesting with the following command ... something about libnotify.so $ junglediskdesktop -V -f junglediskdesktop: error while loading shared libraries: libnotify.so.1: cannot open shared object file: No such file or directory Does anyone have suggestions for what to try?

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• Facing problem with "gtk.RESPONSE_OK" in the simple-player quickly tutorial

  - by sumit_gt

  I am fairly new to both quickly and Python. I am facing several problems while learning to use quickly from the following tutorial on the Ubuntu developers site: http://developer.ubuntu.com/resources/app-developer-cookbook/multimedia/creating-a-simple-media-player/ The following error I'm unable to understand: Traceback (most recent call last): File "/home/sumit/Sumit/simple-player/simple_player/SimplePlayerWindow.py", line 36, in on_openbutton_clicked if response==gtk.RESPONSE_OK: NameError: global name 'gtk' is not defined I realize that I am supposed to import something, so I tried to add import gtk which it didn't work and it gave the following error: from gtk import _gtk /usr/lib/python2.7/dist-packages/gtk-2.0/gtk/__init__.py:40: Warning: g_type_get_qdata: assertion `node != NULL' failed from gtk import _gtk I have followed every step of the tutorials so far. But there is no mention of any other imports other that "prompts" and "os". Please help. Contribution of Agmenor, facing the same problem: I also tried to replace the text if response == gtk.RESPONSE_OK: by if response == Gtk.RESPONSE_OK: (notice the capital G). This gives another error: AttributeError: 'gi.repository.Gtk' object has no attribute 'RESPONSE_OK'

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• How to create an Access database by using ADOX and Visual C# .NET

  - by SAMIR BHOGAYTA

  Build an Access Database 1. Open a new Visual C# .NET console application. 2. In Solution Explorer, right-click the References node and select Add Reference. 3. On the COM tab, select Microsoft ADO Ext. 2.7 for DDL and Security, click Select to add it to the Selected Components, and then click OK. 4. Delete all of the code from the code window for Class1.cs. 5. Paste the following code into the code window: using System; using ADOX; private void btnCreate_Click(object sender, EventArgs e) { ADOX.CatalogClass cat = new ADOX.CatalogClass(); cat.Create("Provider=Microsoft.Jet.OLEDB.4.0;" +"Data Source=D:\\NewMDB.mdb;" +"Jet OLEDB:Engine Type=5"); MessageBox.Show("Database Created Successfully"); cat = null; }

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• Backbone.js, Rails and code duplication

  - by Matteo Pagliazzi

  I'm building a web app and I need a JS framework like Backbone.js to work with my backend rovided by Rails that mostly return JSON objects after DB queries. Searching on the web I've discovered Backbone which seems to be complete, quite populare and actively developed but I've noticed that a lot of things done by Backbone are simply a duplicte of the works done by Rails: for example validation and models. My idea of "perfect" (for my actual needs) JS mvc (it can't be called mvc but i don't have any other names) is something really simple that has a function for each action in my Rails controller that are triggered by a specific event (user/hash changes, click on a button...) and send requests to the server that respond with a JSON object then I'll load a template or execute some JS code. Do you have any concern/suggestion about my idea? Do you know some "micro" js framework like what i have described? If you have worked with backone.js + rails what can you suggest me?

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• Why is C++ predominant in programming contests and competitions?

  - by daniels

  I understand that C++ is a very fast language, but ain't C just as fast, or faster in some cases? Then you might say that C++ has OOP, but the amount of OOP you need for most programming puzzles is not that big, and in my opinion C would be able handle that. Here's why I am asking this: I am very interested in programming contests and competitions, and I am used to coding in C on those. However, I noticed that the vast majority of people use C++ (e.g., 17 out of 25 finalists on Google Code Jam 2011 used it, while no one used C), so I am wondering if I am at a disadvantage going with C. Apart from the Object Orientation, what makes C++ a more suitable language for programming competitions? What are the features of the language I should learn and use to perform better on the competitions? For background, I consider myself pretty proficient in C, but I am just starting to learn C++.

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• A bunch of SharePoint 2010 Videos

  - by Sahil Malik

  Ad:: SharePoint 2007 Training in .NET 3.5 technologies (more information). DNRTV – Developing for SharePoint 2010 Talks about LINQ to SharePoint, and a basic intro of the dev tools. watch Telerik Silverlight Chart showing live data from SharePoint 2010. This video demonstrates the usage of a custom WCF service and a custom silverlight frontend. watch. Telerik Silverlight Grid with BCS Lists in SharePoint 2010 This video demonstrates BCS + Client Object Model + A silverlight front end. watch Telerik R.A.D Calendar shown working with an OOTB Calendar list watch Large file upload in SP using Silverlight. watch Silverlight coverflow implemented on a picture library watch Integrating Yahoo Geocoding API, Bing maps, and Bing search engine in a Silverlight UI in SharePoint watch SharePoint 2010 scalability, RBS, and related stuff. watch SharePoint 2007 and Silverlight – talks about TDD etc. watch Comment on the article ....

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• JMonkey Engine (JME) load Blender scene with textures?

  - by leigero

  I am having the hardest time trying to accomplish the simplest task. I have created a floor and 4 walls (not that complicated) in Blender. I added a basic material and cloud texture so they have something to look at other than gray. When I import them into JMonkey they show up as solid white objects with no shading or depth. White silhouettes. I thought this may be a lighting issue, but I have ambient light added to the scene. I can remove that light or adjust its intensity and it has no affect on the scene. I exported all Blender files into OgreXML format, then converted them to .j3o format in JMonkey. I renamed the textures to match their corresponding mesh and this didn't do anything. Does anybody know how to create a flat object and put it into JMonkey with a texture? This sounds simple and there is absolutely no information on this. This should be step 1!

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• Immutable Method in Java

  - by Chris Okyen

  In Java, there is the final keyword in lieu of the const keyword in C and C++. In the latter languages there are mutable and immutable methods such as stated in the answer by Johannes Schaub - litb to the question How many and which are the uses of “const” in C++? Use const to tell others methods won't change the logical state of this object. struct SmartPtr { int getCopies() const { return mCopiesMade; } }ptr1; ... int var = ptr.getCopies(); // returns mCopiesMade and is specified that to not modify objects state. How is this performed in Java?

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• Email Content creation | Proper design

  - by Umesh Awasthi

  Working on an E commerce application where we need to send so many email to customer like Registration email Forget Password Order placed There are many other emails that can be sent, I already have emailService in place which is responsible for sending email and It needs an Email object, Everything is working find, but I am struck at one point and not sure how best this can be done. We need to create content so as it can be passed to emailService and not sure how to design this. For example, in Customer registration, I have a customerFacade which is working between Controller and ServiceLayer, I just want to delegate this Email Content creation work away from Facade layer and to make it more flexible. Currently I am creating Registration email content inside customerFacade and some how I am not liking this way, since that means for each email, I need to create content in respective Facade. What is best way to go or current approach is fine enough?

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• How to change the sprite colors

  - by Mr_Qqn

  In my rhythm game, I have a note object which can be of different colors depending on the note chart. I could use a sprite sheet with all the different color variations I use, but I would prefer to parametrize this. (For information, a note sprite is compound with one main color, for example a red note has only red, light red and dark red.) So, how to change the colors of a sprite basing on a new color ? I'm working with opengl, but any algorithm or math explanation will do. :) Thanks

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• Wine installation on 12.04 LTS

  - by Dale

  Installed wine from the Software Center and kept getting errors when trying to load windows programs. Uninstalled and did the apt-get installation of the latest version (1.5.7) Ran Wine configuration and get a "Failed to connect to the mount manager, the drive configuration cannot be edited" If i try to install a program it immediately goes to "Internal error" Any Ideas or possible solutions would be appreciated. Thanks Dale Ran winecfg and got the following: getting server_pid from lock 2457 wine: cannot get pid from lock (lock isn't locked) err:process:start_wineboot failed to start wineboot, err 1359 p11-kit: couldn't load module: /usr/lib/i386-linux-gnu/pkcs11/gnome-keyring-pkcs11.so: /usr/lib/i386-linux-gnu/pkcs11/gnome-keyring-pkcs11.so: cannot open shared object file: No such file or directory getting server_pid from lock 2457 wine: cannot get pid from lock (lock isn't locked) err:winecfg:WinMain failed to restart 64-bit L"C:\windows\system32\winecfg.exe", err 1359 getting server_pid from lock 2457 wine: cannot get pid from lock (lock isn't locked)

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• What are the most important concepts to understand for "fluency in developer English"?

  - by Edward Tanguay

  In April, I'm going to be giving a talk called **English 2.0 - Understanding the Language of Developers" to a group of English teachers. The purpose is in two hours to give them a quick background in key concepts so that they can better understand developer blogs and podcasts and are able to ask better questions when talking to developers. What do you think are the most important concepts to understand, concepts that developers take for granted but the general public is not familiar with? Here are a few ideas: version control abstractions pub/sub push vs. pull debugging modularity three-tier architecture class/object "spaghetti code" vs. OOP exception throwing crowd sourcing refactoring the cloud DRY - don't repeat yourself client/server unit testing designer/developer

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• WPF MenuItem hiding (2 replies)

  Hi, I would like to hide selected MenuItem on Delete key press without closing the menu. My markup is: Menu MenuItem Header &quot;Menu&quot; MenuItem Header &quot;First&quot; KeyDown &quot;MenuItem KeyDown&quot;/ MenuItem Header &quot;Second&quot; KeyDown &quot;MenuItem KeyDown&quot;/ MenuItem Header &quot;Third&quot; KeyDown &quot;MenuItem KeyDown&quot;/ /MenuItem /Menu where event handler is: private void MenuItem KeyDown(object sender, KeyEventArgs e) { if (e.Key...

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• Smart Grid Gateway and New Meter Data Management released

  - by Anthony Shorten

  Two products have just been released and are available from edlivery.oracle.com. Smart Grid Gateway 2.0.0 - A new product to integrate to Smart Grid networks Meter Data Management 2.0.1 - A new version of the Meter Data Management product. These products are the first products to use the brand new version of the Oracle Utilities Applicaton Framework (V4.1). The new framework builds up on FW2.2 and FW4.0.2 to add exciting new features (this is just a subset): Support for Database Vault Enhancements to Business Object Maintenance Batch Statistics Portal for benchmarking Custom template user exit support File permissions now consistent with other Oracle products Use of Universal Connection Pool for all database pool access Ability to manage the batch data cache Over the next few weeks I will be publishing articles and updates to existing whitepapers to highlight all the new features.

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• The Grand Unified Framework Theory

  Tom Janssens left a comment: What still bugs me is that we do not have a unified pattern for all .net dev (using modelbinders and icommand for example...) But, Tom we are pretty close. At least as close as we should be, I think. With .NET there are plenty of low level patterns we can reuse regardless of the application platform or architecture. Stuff like: Asynchronous programming with events or the TPL. Object queries with LINQ. Resource management with IDispose. At a higher...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• List of bounding boxes?

  - by Christian Frantz

  When I create a bounding box for each object in my chunk, would it be better to store them in a list? List<BoundingBox> cubeBoundingBox Or can I just use a single variable? BoundingBox cubeBoundingBox The bounding boxes will be used for all types of things so they will be moving around. In any case, I'd be adding it to a method that gets called 2500+ times for each chunk, so either I have a giant list of them or 2500+ individual boxes. Is there any advantage to using one or the other?

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• LWJGL glRotatef() without rotating axes?

  - by Brandon oubiub

  Okay so, I noticed when you rotate around an axis, say you do this: glRotatef(90.0f, 1.0f, 0.0f, 0.0f); That will rotate things 90 degrees around the x-axis. However, it also sort of rotates the y and z axes as well. So now the y-axis is pointing in and out of the screen, instead of up and down. So when I try to do stuff like this: glRotatef(90.0f, 1.0f, 0.0f, 0.0f); glRotatef(whatever, 0.0f, 1.0f, 0.0f); glRotatef(whatever2, 0.0f, 0.0f, 1.0f); The rotations around the y and z-axes end up not how I want them. I was wondering if there is any way I can sort of rotate just the axes back to their initial position after using glRotatef(), without rotating the object back. Or something like that, just so that when I rotate around the y-axis, it rotates around a vertical axis.

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• Azure Blob storage defrag

  - by kaleidoscope

  The Blob Storage is really handy for storing temporary data structures during a scaled-out distributed processing. Yet, the lifespan of those data structures should not exceed the one of the underlying operation, otherwise clutter and dead data could potentially start filling up your Blob Storage Temporary data in cloud computing is very similar to memory collection in object oriented languages, when it's not done automatically by the framework, temp data tends to leak. In particular, in cloud computing,  it's pretty easy to end up with storage leaks due to: Collection omission. App crash. Service interruption. All those events cause garbage to accumulate into your Blob Storage. Then, it must be noted that for most cloud apps, I/O costs are usually predominant compared to pure storage costs. Enumerating through your whole Blob Storage to clean the garbage is likely to be an expensive solution. Lokesh, M

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• How does flash store (represent) movieclips and sprites?

  - by humbleBee

  When we draw any object in flash and convert it into a movieclip or a sprite, how is it stored or represented in flash. I know in vector art it is stored or represented as line segments using formulae. Is there any way to get the vertices of the shape that was drawn? For example, lets say a simple rectangle is drawn and is converted to a movieclip. Is there anyway to obtain the vertices and the line segments from the sprite? So that its shape is obtained. Enough information should be obtained so that the shape can be replicated. That's the key - replication. In simple terms, where does flash store information about a shape that has been drawn so that we can obtain it and attempt to replicate the shape ourselves?

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• Offline MySQL installation (Using deb file and no internet connection)

  - by Muhammad Gelbana

  I downloaded MySQL's installation package and ran the following command after installing a fresh Ubuntu server. dpkg -i mysql-5.5.28-debian6.0-x86_64.deb It installed fine and then I tried starting up the server manually /opt/mysql/server-5.5/bin/mysqld And the following error came up /opt/mysql/server-5.5/bin/mysqld: error while loading shared libraries: libaio.so.1: cannot open shared object file: No such file or directory How can I install that library in an offline way ? I have no means whatsoever to an internet connection from that server and I can't even relocate it to have internet connection temporarily ! Thank you.

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• Why use link classes in oql instead of classes that contain links

  - by Isaac

  itop abstracts its very complex database design with an object query language (oql). For this there are classes definded, like 'Ticket' and 'Server'. Now a Ticket usually is linked to a Server. In my naive way I would give the Ticket class an attribute 'affected_server_list', where I could reference the affected servers. itop does it different: neither Servers nor Tickets know of each other. Instead there is a class 'linkTicketToServer', which provides the link between the two. The first thing I noticed is that it makes oql queries more complex. So I wondered why they designed it this way. One thing that occured to me is that it allows for more flexiblity, in that I can add links without modifying the original classes. Is this allready why one would implement it this way, or are there other reasons for this kind of design?

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