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• MVC shared model different required fields on different type

  - by kurasa

  I have a model called Car and depending on what type of Car the user select the view is presented differently. For example the user selects from a grid of different cars and depending if it is a Volvo or a Kia or a Ford the view must allow different fields to be editable. For example with a Volvo the color is editable and is mandatory but with a Kia it is not. I would like to use the one Car class to bind the view but want the client side validation to pick up the required fields based on what type of car. I want to go only to one Action method for the Update what is a good way to approach this problem...? create a base class and inherit from it? will this give me binding problems..?

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• Inexpensive generation of hierarchical unique IDs

  - by romaninsh

  My application is building a hierarchical structure like this: root = { 'id': 'root', 'children': [ { 'name': 'root_foo', 'children': [] }, { 'id': 'root_foo2', 'children': [ { 'id': 'root_foo2_bar', 'children': [] } ] } ] } in other words, it's a tree of nodes, where each node might have child elements and unique identifier I call "id". When a new child is added, I need to generate a unique identifier for it, however I have two problems: identifiers are getting too long adding many children takes slower, as I need to find first available id My requirement is: naming of a child X must be determined only from the state in their ancestors When I re-generate tree with same contents, the IDs must be same or in other words, when we have nodes A and B, creating child in A, must not affect the name given to children of B. I know that one way to optimize would be to introduce counter in each node and append it to the names which will solve my performance issue, but will not address the issue with the "long identifiers". Could you suggest me the algorithm for quickly coming up with new IDs?

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• Bad texture on model with different GPU

  - by Pacha

  I have some kind of distortion on the texture of my 3D model. It works perfectly well on an AMD GPU, but when testing on a integrated Intel HD graphics card it has a weird issue. I don't have a problem with the rest of my entities as they are not scaled. The models with the problems are scaled, as my engine supports different sizes for the platforms. I am using Ogre3D as rendering engine, and GLSL as shader language. Vertex shader: #version 120 varying vec2 UV; void main() { UV = gl_MultiTexCoord0; gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex; } Fragment shader: #version 120 varying vec2 UV; uniform sampler2D diffuseMap; void main(void) { gl_FragColor = texture(diffuseMap, UV); } Screenshot (the error is on the right and left side, the top and bottom part are rendered perfectly well):

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• Terminal flashing between current and previous screen

  - by cjordan1

  I just upgraded from Ubuntu 12.04 to 14.04. After upgrading the terminal will sometimes, but not always, flash between the current screen and the previous screen. Here are some examples: The output of an 'ls' command will flash on and off the screen. But when I press enter to start a new line, sometimes--but not always--the output of ls will stop flashing and instead the newline will begin flashing. Sometimes vim will start flashing between the current place and a previous place, such as right after a search. This also happens when I opened just sh within a bash terminal. (I was hoping the issue was just with my .bashrc, though I haven't changed it in months and didn't have any issues in 12.04.) This is incredibly annoying, and has made the terminal essentially unusable.Unfortunately, google-ing for a half hour hasn't shown anyone running into similar problems, either on 14.04, other versions of ubuntu,or other versions of linux.

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• Evolution and thunderbird sharing same mail data?

  - by balki

  Hi, I have been using Evolution for a quite long and it has downloaded around 1.6GBs of mails from gmail. I want to try thunderbird but I dont want to re download everything again. Is that possible to have both clients sharing same data? I'll make sure I don't use both at the same time if that matters. I'll move to thunderbird fully if I'm happy with it. Problems I face with evolution is that I have to have the GUI running always if I want to get instant alerts and send mail immediately. Also it loads the messages slow and even after I move to the next mail, it slowly downloads all the linked images before moving on.

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• Cinnamon cannot install due to libbgjs0 dependency

  - by Kin.

  I was following the How do I install the Cinnamon Desktop?, but when i install, it like this locahost@locahost:~$ sudo apt-get install cinnamon Reading package lists... Done Building dependency tree Reading state information... Done Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming. The following information may help to resolve the situation: The following packages have unmet dependencies: cinnamon : Depends: libgjs0- E: Unable to correct problems, you have held broken packages. How can i install the libgjs0- package?

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• I'm trying to install postgresql on 12.04, and it's just not working

  - by Pointy

  I've got a new installation and I'm trying to get Postgresql working. The database was installed and I started a restoration from a dump on another machine, but that ran into problems because I had forgotten to install the "contrib" package. I used "pg_dropcluster" to drop the old cluster so I could start from scratch, and that's when things went weird. The first manifestation of this was that /etc/postgresql was just empty. I uninstalled the postgresql package and reinstalled, several times, to no avail. Is there something I can do to figure out why apt is confused here? I've done this many times on many systems and never seen anything like this happen.

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• How can I get my mysqld-swamped CPU under control?

  - by Shay Guy

  I was AFK for about 24 hours and came back to find gnome-system-monitor saying all four CPU cores on my laptop were running at full throttle. mysqld is taking up more than one full core; when I tried to end the process, it restarted with a new PID. Then there's ksoftirqd/0-3, which apparently has something to do with interrupts, but I can't tell from Google what I'm supposed to do with those four particular processes. They're taking up a quarter or more of my processor cycles. Then there's Chrome, but I can probably handle that on my own -- how do I cool down the other processes giving me problems?

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• How do I install pgAdmin III for postgreSQL 9.2?

  - by Vector

  I have a Windows server that runs postgresql 9.2. I want to hit it using pgAdmin III from my Ubuntu 12.10 workstation box. I installed pgAdmin III from synaptic and also tried direct download from postgreSQL site using software installer. Regardless, I can get only get pgAdmin III for postgresql 9.1. When I run pgAdmin III and point to my server I get an error message telling me that the database is 9.2 and my pgAdmin III is for 9.1, isn't compatible with 9.2. I can access the server itself fine OK from the Ubuntu box - I have Python programs that hit the database with no problems - but I need pgAdmin III for 9.2 running under Ubuntu 12.10. Is it available? Where do I get it?

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• Declarative Transactions in Node.js

  - by James Kingsbery

  Back in the day, it was common to manage database transactions in Java by writing code that did it. Something like this: Transaction tx = session.startTransaction(); ... try { tx.commit(); } catch (SomeException e){ tx.rollback(); } at the beginning and end of every method. This had some obvious problems - it's redundant, hides the intent of what's happening, etc. So, along came annotation-driven transactions: @Transaction public SomeResultObj getResult(...){ ... } Is there any support for declarative transaction management in node.js?

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• Where is the object browser in VS 2010

  - by Keltari

  I am teaching myself C# and Im using a book that references Visual Studio 2008. However, I am using VS 2010. The book wants me to look at the object browser by choosing View, Other Windows, Object Browser from the menu. However, the object browser is not there. I moused over the icons on the menu and nothing stood out. So, where is it? Also, am I going to run into more problems like this? Is it worth getting an updated book?

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• Story and news-feed ideas for social network games

  - by arpine

  I am currently working on a educational and fun 2-in-1 game. As I am not a professional, I need advice on story and news-feed. The goal is simple-get richer, the story is about a worker who is trying to get over his/her financial problems and become rich. During the whole gaming process there is a news-feed (every day there are a couple of fresh news about what is going on). The news are fresh and individual so I need to write about 2000 pieces of news for 2 year gaming, maybe more. The problem is that I am not sure whether repetitive news can interest in this game. What can be done to make the news-making process easier but not boring from the point of view of the player?

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• How do I remove Deluge?

  - by Marc

  OK I have had Ubuntu for a month now and have absolutely been loving it. I have been able to fix problems in the terminal etc. Until I downloaded Deluge. Deluge does not work and it is acting like a virus. I have tried all the recommendations I can find I have tried 5 or so different terminal commands and nothing works. I can no longer choose another torrent down loader like transmissions because it is no longer on the list when asked which program I want to use to download a torrent all I get is Deluge which is pretty lame since I have removed it like 5 different ways. I just want Deluge off of my computer how hard can it be? Someone help!!

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• Ubuntu Server 12.04 start fails after update

  - by Abbgrade

  I did an system update on ubuntu server 12.04, which requestet an reboot. Since that, the system never reaches the login. It hangs on: mount: mounting /dev on /root/dev failed: No such file or directory done. mount: mounting /sys on /root/sys failed: No such file or directory mount: mounting /proc on /root/proc failed: No such file or directory Target filesystem doesn't have requested /sbin/init. No init found. Try passing init= bootarg. BusyBox v1.18.5 (Ubuntu 1:1.18.5-1ubuntu4) build-in shell (ash) Enter 'help' for a list of build-in commands. (initramfs) i tried already to repair it using a live system: + Mounting the filesystems (/boot ext, / btrfs) + fsck ran without problems. + /etc/fstab seems to be OK. + apt update/upgrade on chroot succeed. now, i have no more ideas :/

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• nagios3 Error: Could not read object configuration data!

  - by user1493730

  I have a brand new install of nagios3 on ubuntu 12.04. After I log in to the web interface and click any link I get the error: Error: Could not read object configuration data! Here are some things you should check in order to resolve this error: Verify configuration options using the -v command-line option to check for errors. Check the Nagios log file for messages relating to startup or status data errors. I ran it with the -v option and it reported no errors: Total Warnings: 0 Total Errors: 0 Things look okay - No serious problems were detected during the pre-flight check The nagios log and apache error log and debug log all have nothing regarding this. Does anyone know how to turn on logging that will give me some kind of useful error? Or if anyone knows how to fix this specific problem without additional logging, I guess that's okay too. Thanks!

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• Strategies for removing register_globals from a file

  - by Jonathan Rich

  I have a file (or rather, a list of about 100 files) in my website's repository that is still requiring the use of register_globals and other nastiness (like custom error reporting, etc) because the code is so bad, throws notices, and is 100% procedural with few subroutines. We want to move to PHP 5.4 (and eventually 5.5) this year, but can't until we can port these files over, clean them up, etc. The average file length is about 1000 lines. I've already cleaned up a few of the low-hanging fruit, however the job took almost an entire day for 2 300-500 line files. I am in a quagmire here (giggity). Anyway, has anyone else dealt with this in the past? Are there any strategies besides tracing backwards through the code? Most static analysis tools don't look at code outside of functions - are there any that will look at the procedural code and help find at least some of the problems?

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• Google indexed site's address by accident. What do I do now?

  - by AndrejaKo

  I was making a site for a friend of mine and he wanted to be able to see my progress as I worked on the site, so I decided to put the site on a server on my computer and enable access by a domain name registered to me. It turns out that I forgot to set up a robots.txt file for the site and somehow Google indexed the site. My question is: What do I do now? As I understand it, Google doesn't like duplicate content and my friend could have problems when I upload the new site to his server. Right now his current site, which only has a work in progress page, is first on Google when searching for relevant keywords and I really really don't want to damage that. Is there anything else I need to be concerned about?

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• Enterprise Mobile Apps

  - by Sahil Malik

  SharePoint 2010 Training: more information This is one of those rare occasions when I get to write about what I’m working on in my consulting life. I’m a very lucky guy, I get to work on some very tough and challenging solutions for clients around the world. In working on such problems, I face the best challenges which help me be a better consultant. A better consultant is a better trainer. There is no substitute for real world experience. As an example, Winsmarts started working on a product with Din ERP that would bring ERP functionality into SharePoint. Not influenced by marketecture, and the only driver being success at customer, as an architect for this endeavor, I experimented with and decided against technologies such as Silverlight. We subsequently invested heavily in JavaScript when the prevalent browser was still IE6. It wasn’t easy to create an amazing amount of functionality in JavaScript, but over time we enriched the product and today we have a very compelling Read full article ....

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• Alt + Tab window switcher preview stoped working

  - by umpirsky

  It just stopped working. After I boot Ubuntu it does not work. When I run unity --replace it works again, but after restart problem occurs again. And that happens on every reboot. I have some startup apps, but I don't think that can be the problem. Any idea? UPDATE: Looks like I had some problems with firefox causing Alt+Tab to stop working. After reinstalling firefox and computer restart it works.

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• Is curl something that's not expected to be installed on servers

  - by Ieyasu Sawada

  Is curl something that's not expected to be installed on servers? I'm working for a small development shop and 99% of the problems that I'm having is regarding curl. Most of the projects that I'm working on involves calling a web API. Most web API's suggests using curl by default since you have to pass in a POST data in the request. Every time I complain to my senior that the server that I'm working on doesn't have curl installed the excuse that I'm always getting is that curl is not needed you can always use file_get_contents. So the question: is curl something that's not expected to be installed on servers that runs PHP, should I always develop using file_get_contents and not curl? Are there any advantages of using file_get_contents over curl or vise versa? If it helps, the context here is wordpress plugins, shopify apps, drupal modules and other bits of code that a lot of people can install.

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• Auto completion (using the Tab key) on the new Ubuntu 11.10

  - by Shubhroe

  Earlier, when I used tab to auto-complete filenames (using the tab key) and if the filenames contained blank spaces or certain special characters, the name would be listed with backslashes '\' thrown in so that it could work with a preceding command like ls or rm. eg. Earlier if I had a file name called "The Four Seasons- Spring - Allegro.mp3" and this was the only file name starting with "The", when I typed "rm The" and Tab, it would complete itself to "rm The\ Four\ Seasons-\ Spring\ -\ Allegro.mp3" and I could subsequently press Enter and remove the file. However, lately what happens when I press Tab is the following: "rm The Four Seasons- Spring - Allegro.mp3" and if I now press Enter, it returns a bunch of errors because it thinks I want to remove a bunch of files (named The, Four, etc.). Does anyone else encounter the same problems and if yes, is there a good way to resolve this problem? Thanks!

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• 11.10 had sound, 12.04 doesnt. Acer Aspire One D257

  - by Jeff Welling

  I'm wondering if anyone else has had this same problem, because if so it might be worth while for me to file a bug, but it might also be chaos monkey so I wanted to check first. I have an Acer Aspire One D257 and the sound worked in 11.10 by default, but after doing a fresh install of 12.04 there is no sound. There used to be a speaker icon on the menu bar but now there isn't, and volume up and volume down hotkeys now do nothing, which leads me to believe it isn't detecting the sound card properly anymore. Googling for sound problems on an Acer Aspire One D257 on 12.04 isn't showing any helpful results, so I'm wondering if it's just me. Does anyone have an AAO D257 on 12.04 with the sound working, and if so did you have to do anything special to make it work?

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• ATI graphics card, with gnome shell, screen flickers

  - by bioShark

  After installing gnome shell, without any problem, after log in the fonts are missing and it looks like crap...nothing is readable. Don't want to make it a double post, because my issue is similar to the one from this question but for me the problems have not been solved properly. After running the commands from that post, and installing the latest AMD 11.10 driver, the Gnome shell display issues have been solved. But each time I move the mouse in the upper left corner, to bring up the applications...my entire screen flickers. Without the applications been displayed, everything looks fine. Hardware: ATI HD4870, Intel Q6600.

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• Is using Javascript/JQuery for layout and style bad practice?

  - by Renesis

  Many, but not all, HTML layout problems can be solved with CSS alone. For those that can't, JQuery (on document load) has become very popular.* As a result of its ease, many developers are quick to use JQuery or Javascript for layout and style — even without understanding whether or not the problem can be solved with CSS alone. This is illustrated by responses to questions like this one. Is this bad practice? What are the arguments for/against? Should someone who sees this in practice attempt to persuade those developers otherwise? If so, what are the best responses to arguments in favor of JQuery saying it's "so easy"? * Example: Layouts that wish to use vertical layout flow of some kind often run into dead ends with CSS alone — this would include layouts similar to Pinterest, though I'm not sure that's actually impossible with CSS.

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• Using .add() on the same widget more than once

  - by Dillon Gilmore

  I asked this question on Reddit and was directed here. http://www.reddit.com/r/Ubuntu/comments/vhadl/quickly_dynamic_ui/ Unfortunately I am having the same issue and the problems seems that you can only use .add() on a widget once. So here is my code, self.ui.labels = [] for titles in entries: label = Gtk.Label() self.ui.labels.append(label) self.ui.viewport1.add(self.ui.labels[-1]) self.ui.paned1.show_all() Now, for fun I decided "What would happen if I just manually did..." self.ui.viewport1.add(Gtk.Label()) self.ui.viewport1.add(Gtk.Button()) self.ui.viewport1.add(Gtk.Entry()) For my first code snippet I get this error, Gtk-CRITICAL **: gtk_viewport_add: assertion gtk_bin_get_child (bin) == NULL' failed The error happens an unknown amount of times because the list entries can vary in length, but for my second code snippet it happens exactly twice. This means that when I viewport1.add() it works the first time, but all adds after that receive the error above. So my question, is there a way in python to use .add() on the same widget more than once?

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