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• What skills does a web developer need to have/learn?

  - by Victor

  I've been I've asked around, and here's what I gathered so far in no particular order: Knowledge Web server management (IIS, Apache, etc.) Shell scripting Security (E.g. ethical hacking knowledge?) Regular Expression HTML and CSS HTTP Web programming language (PHP, Ruby, etc.) SQL (command based, not GUI, since most server environment uses terminal only) Javascript and library (jQuery) Versioning (SVN, Git) Unit and functional test Tools Build tools (Ant, NAnt, Maven) Debugging tools (Firebug, Fiddler) Mastering the above makes you a good web developer. Any comments?

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• What exactly can shaders be used for?

  - by Bane

  I'm not really a 3D person, and I've only used shaders a little in some Three.js examples, and so far I've got an impression that they are only being used for the graphical part of the equation. Although, the (quite cryptic) Wikipedia article and some other sources lead me to believe that they can be used for more than just graphical effects, ie, to program the GPU (Wikipedia). So, the GPU is still a processor, right? With a larger and a different instruction set for easier and faster vector manipulation, but still a processor. Can I use shaders to make regular programs (provided I've got access to the video memory, which is probable)? Edit: regular programs == "Applications", ie create windows/console programs, or at least have some way of drawing things on the screen, maybe even taking user input.

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• Why should I adopt MVC?

  - by Andrew

  I decided to get my hands wet and got the YII framework for PHP. I created my first application, then created new controller, model and view. Connected to database, got my record passed from controller to the view and printed the hello world. I am confused now. If I have to do the same thing for each page, this seems like a nightmare to me. In each controller I have to do a lot of same operations - declare variables, and pass them to views. I also need to create models for each page and this is all confusing to me. In my idea the main goal of development is to avoid duplication, but what I see here is lots and lots of duplicated code. Please advise and clarify. Maybe you could suggest a good reading about MVC and coding patterns and best practices in MVC. Because so far, it takes much more time to create a small site using MVC than using my own programming schema.

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• How to play the sound of an object sliding on another object for a variable duration

  - by Antoine

  I would like to add sound effects to a basic 2D game. For example, a stone sphere is rolling on wood surface. Let's say I have a 2 second audio recording of this. How could I use the sample to add sound for an arbitrary duration ? So far I have two solutions in mind: a/ record the sound for an amount of time that is greater than the maximum expected duration, and play only a part of it; b/ extract a small portion of the sample and play it in a loop for the duration of the move; however I'm not sure if it makes sense with an audio wave.

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• Will Traffic exchange programs work in Pay per impression ad campaigns

  - by vinoth

  I'm having a technology blog with nearly 3000 visitors a day (1000 - 1300 unique visitors). I'm generating visitors through traffic exchange programs like hitleap.com, addmefast.com. Now i'm planning to go with some pay per impression programs. So far i came to know that google adsense won't allow using traffic exchange programs. Did all pay-per-impression programs will follow the same ? will i get banned using traffic exchange programs? Please reply me your suggestions, Thanks in advance. Sorry for my bad English.

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• Inspecting the model in a Rails application

  - by Matt Sherman

  I am learning some Ruby on Rails, and am a newbie. Most of my background is in ASP.net MVC on the back end. As I play with a basic scaffold project, I wonder about this case: you jump into an established Rails project and want to get to know the model. Based on what I have seen so far (again, simple scaffold), the properties for a given class are not immediately revealed. I don't see property accessors on the model classes. I do understand that this is because of the dynamic nature of Ruby and such things are not necessary or even perhaps desirable. Convention over code, I get that. (Am familiar with dynamic concepts, mostly via JS.) But if I am somewhere off in a view, and want to quickly know whether the (eg) Person object has a MiddleName property, how would I find that out? I don't have to go into the migrations, do I?

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• Best choise of gui platform/framework for 3d development [closed]

  - by Miguel P

  The title pretty much says it all, so I'm developing a 3d engine for Directx 11, and it's going good so far. I started using .net forms as a GUI, but then(Of curiosity), i jumped to MFC, and the app looked great, but in my perspective, MFC is badly written, and it's too complicated, meaning that some things just took forever, while it would have taken a few seconds in .net forms. But my real question is: If i want to make an Editor for a 3d scene, where directx renders in the form( This was accomplished in .net forms), what would be the best choise of gui platform/framework? MFC,.net forms, Qt, etc....

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• Netbeans shows only blank window

  - by aGr

  I am not able to launch Netbeans. When I launch it for the first time I normally get the netbeans splash screen, but after that nothing happens. When I try to launch it again, a small blank window appears. I am able to enlarge the window, but it is completely blank. Any ideas? As far as I remember this didn't come after some update/new install or whatever. Netbeans worked perfectly, but then all from the sudden...

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• Part of the launcher has been cut off, Ubuntu 12.04

  - by Tim

  After a hard drive failure on my iMac, I replaced it and installed Ubuntu. So far, I am finding it very easy to use, however there is one problem which is making it much harder. The bottom of the launcher is missing - it is 'covered' by the desktop background. This means that I cant see the trash, or bottom few icons. Even if I scroll, it doesn't show it. Any help is very much appreciated. If you send a message to [email protected], with the subject "launcher photo", I will send you an email with the photo of the missing part attached. Currently, my only fix is to enable and then disable the extra screen it thinks is there - called unknown device

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• Menu bars are a basic light gray after installing graphics card driver. [closed]

  - by Jonathan

  Possible Duplicate: Desktop forgets theme? Hi, I've just installed Ubuntu 10.10 64-bit. It came up saying I could install 2 proprietary drivers, one for my WiFi adapter (which works perfectly) and one for my graphics card - a Sapphire AIT Radeon HD 5770 1024MB GDDR5 PCI-Express Graphics Card. The driver is called ATI/AMD proprietary FGLRX graphics driver. Before installing this driver I was unable to have Extra Visual Effects in Appearances. However after installing (and restarting) the menu bars are now in a basic light gray mode, rather than the sleek Ubuntu black. - Although Extra Visual Effects does now work. I've tried rebooting, and I've had a look around in ATI "Catalyst Control Center" but nothing has worked so far. Does anybody know what this windows mode is, how to change it back to normal and why it's doing it in the first place? Below is a screenshot of my computer: (This is also the first time I've installed Ubuntu on my computer, and am keen for it to work.)

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• Ping works , but unable to do ssh

  - by gpuguy

  I disabled the firewall with sudo ufw disable, I can ping the server, the server can ping me but I can't ssh to it: root@ubuntu:/home/acme# ssh 192.168.1.6 ssh: connect to host 192.168.1.6 port 22: Connection refused I removed ssh and reinstalled : sudo apt-get remove openssh-client openssh-server sudo apt-get install openssh-client openssh-server But still ssh is not working and I get the error connection refused How do I tackle this issue? Here are some other stuff I have tried so far: root@ubuntu:/home/acme# sudo service ssh start start: Job is already running: ssh root@ubuntu:/home/acme# ps aux | grep ssh acme 6548 0.0 0.0 12576 320 ? Ss 04:09 0:00 /usr/bin/ssh-agent /usr/bin/dbus-launch --exit-with-session gnome-session --session=ubuntu root 22219 0.0 0.1 50040 2852 ? Ss 05:10 0:00 /usr/sbin/sshd -D root 22277 0.0 0.0 8116 896 pts/0 S+ 05:17 0:00 grep --color=auto ssh Update for future visitors removing and reinstalling ssh on the server worked for me : sudo apt-get remove openssh-client openssh-server sudo apt-get install openssh-client openssh-server

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• How can I convince management to deal with technical debt?

  - by Desolate Planet

  This is a question that I often ask myself when working with developers. I've worked at four companies so far and I've become aware of a lack of attention to keeping code clean and dealing with technical debt that hinders future progress in a software app. For example, the first company I worked for had written a database from scratch rather than use something like MySQL and that created hell for the team when refactoring or extending the application. I've always tried to be honest and clear with my manager when he discusses projections, but management doesn't seem interested in fixing what's already there and it's horrible to see the impact it has on team morale. What are your thoughts on the best way to tackle this problem? What I've seen is people packing up and leaving. The company then becomes a revolving door with developers coming in and out and making the code worse. How do you communicate this to management to get them interested in sorting out technical debt?

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• Why Is Another Domain Resolving To My IP Address?

  - by Andrew

  I'm not really sure if this is something that I should worry about... I'm currently renting a dedicated server which is hosting a website I've created. The domain of the website was registered with GoDaddy. After submitting a sitemap to Google several months ago, I've noticed that another domain name is resolving to my IP address. This means that every page on my website is actually accessible from another domain. As far as I can tell, the other domain name is meaningless to me, so I'm not sure if this is something I should worry about or not. Is this a residual DNS record from another site that is probably no longer in use? Is it important from the standpoint of either security or SEO? My website is a .com which will later serve e-commerce purposes. The other domain has a top-level domain of st. It's the first one of those that I've encountered. Many thanks in advance!

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• alt+shift can't be set to toggle language

  - by Ali

  I recently did a fresh installation of Ubuntu 13.10; but there is something bothering me, which I don't quite understand. When I first tried to toggle the keyboard language(I usually switch between Persian and English) using the good old "alt+shift" shortcut it didn't work. Then, I went and checked the Keyboard shortcut settings and found out that it had been set to "super+space"(which BTW didn't work either). So I tried to change it back to "alt+shift" but it just doesn't work; when I press "alt+shift" to set it up as the toggle-language shortcut, the box automatically resets itself to its previous value(without any errors whatsoever). As far as I've checked I couldn't find any thing obvious corresponding to the shortcut "alt+shift" either. I've currently set up the shortcut as "Ctrl+space"; so I can toggle the language. My question is why I cannot set it up to just "alt+shift"?

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• Boot-Repair after messing up NTFS partition

  - by QuietThud

  I posted this question explaining what happened after I tried to create a new swap partition on a Win/Ubuntu dual-boot machine. I have since created a live-boot USB and installed Boot-Repair. I had it "recommend repairs", after which it tried repairing the wubi filesystems, which as far as I'm aware was not necessary. I'm not sure where to go from here; I don't care very much about backing up my files, I just want to be able to boot the machine. In the Advanced Options the "Repair Windows boot files" box is uncheckable both GRUB tabs are unclickable (I do have GRUB installed) Here is my Pastebinit with the details from the Boot-Repair. Please be as explicit as possible, as I am proving to be disproportionately bad at this type of task. Thank you! P.S. I keep seeing: cryptsetup: WARNING: failed to detect canonical device of overlayfs cryptsetup: WARNING: could not determine root device from /etc/fstab TestDisk: GPARTED:

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• OpenGL behaviour depending on the graphics card?

  - by Dan

  This is something that never happened to me before. I have an OpenGL code that uses GLSL shaders to texture a 3D model. The code involves a lot of GPU texture processing, blending, etc... I wanted to check how the performance of my code improves using a faster graphics card (both new and old are NVIDIA, using always the NVIDIA development drivers). But now I have found that once I run the code using the new graphics card, it behaves completely different (the final render looks wrong), probably because some blending effect is not performed correctly. I haven't really look into what has changed, but I am guessing that some OpenGL states are, by default, set different. Is this possible? Have you ever found different OpenGL/GLSL behaviour using different graphics cards? Any "fast" solution? (So far I've thought of plugging back the old one, push all OpenGL default states, and compare with the ones I initially get using the new card..)

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• Excel data representation: show me all people who did not pass the exam

  - by dreftymac

  Background I have an excel spreadsheet with the results of a pass/no-pass exam. Students are allowed to take the exam as often as they want until they either pass, or give up trying. student ;; result ;; date [email protected] ;; no-pass ;; 2000-06-07 [email protected] ;; pass ;; 2000-06-07 [email protected] ;; pass ;; 2000-06-07 [email protected] ;; no-pass ;; 2000-06-07 [email protected] ;; pass ;; 2000-06-07 [email protected] ;; pass ;; 2000-06-08 [email protected] ;; no-pass ;; 2000-06-08 Question Using a pivot-table or something else, how can I get excel to show me a clean report or representation of this data on another sheet that answers the question: Who are all the people who took the exam, but never got a passing grade? In the above example it would just show me [email protected] ;; no-pass ;; with all the dates that delta took the exam. I know excel is not a database nor a reporting tool per-se, but it would be great if I could get it to do this.

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• How do you handle increasingly long compile times when working with templates?

  - by Ghita

  I use Visual Studio 2012 and he have cases where we added templates parameters to a class "just" in order to introduce a "seam point" so that in unit-test we can replace those parts with mock objects. How do you usually introduce seam points in C++: using interfaces and/or mixing based on some criteria with implicit interfaces by using templates parameters also ? One reason to ask this is also because when compiling sometimes a single C++ file (that includes templates files, that could also include other templates) results in an object file being generated that takes in the order of around 5-10 seconds on a developer machine. VS compiler is also not particularly fast on compiling templates as far as I understand, and because of the templates inclusion model (you practically include the definition of the template in every file that uses it indirectly and possibly re-instantiate that template every time you modify something that has nothing to do with that template) you could have problems with compile times (when doing incremental compiling). What are your ways of handling incremental(and not only) compile time when working with templates (besides a better/faster compiler :-)).

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• Trace code pascal [on hold]

  - by mghaffari

  I haven't worked with Pascal so far, and my problem is understanding the recursive aspects that prm assignment operators and how the final (correct) value is derived. Would someone please explain that line for me. Program test(output); FUNCTION prm(az:integer) : real; begin if az = 1 then prm := sqrt(12) else prm := sqrt(12*prm(az-1)); end; begin writeln(prm(30):0:2); end.

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• Free (Or Cheap) Alternatives For An SSL Certificate For Facebook Apps

  - by mickburkejnr

  In October (from what I remember) Facebook will require HTTPS connections to pages and app's that are hosted away from Facebook. At the moment, it comes up with a popup saying "do you want to turn secure browsing off". I think (as far as I know) that once October comes people won't be able to access these pages any more. Now, I know you have to pay for good SSL certificates. However, for a lot of clients this is just going to be a Facebook page, and not mission critical to their businesses. With this in mind, they may not want to pay for an SSL certificate. I was wondering if there are any free SSL certificates that could do the job? Even if there are no free ones, are there any cheap alternatives? Also, if you do use a free certificate, will it still work in the same way as a paid for certificate?

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• Setting up Developers Conference

  - by Darknight

  In our local city in the UK, there are as far as I am aware no developer conferences. I am confident that our region has many professional developers as well as many graduating students whom who really benefit from a conference. I would like to ask the following questions: What steps or advice would one take if the task was given to set up a local developers conference? What would the costing look like? (excluding building/hosting of website(s)) How would one build interest and promote this? How would I approach, Local Companies & Universities to collaborate with them? I'm not just aiming this question to users who may have experience in setting up such conferences (but are highly welcome). Rather how would you attack this if you was tasked with this?

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• SDL2 with OpenGL -- weird results, what's wrong?

  - by ber4444

  I'm porting an app to iOS, and therefore need to upgrade it to SDL2 from SDL1.2 (so far I'm testing it as an on OS X desktop app only). However, when running the code with SDL2, I'm getting weird results as shown on the second image below (the first image is how it looks with SDL, correctly). The single changeset that causes this is this one, do you see something obviously wrong there, or does SDL2 have some OpenGL nuances I'm unaware of? My SDL is based on changeset dd7e57847ea9 from HG (since then there is one "Allow specifying of OpenGL 3.2 Core Profile on Mac OS X" commit, not sure if that would help).

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• Second gen ipod shuffle not working with rhythmbox

  - by richzilla

  hi all, I'm trying to get a second gen ipod shuffle to work with Ubuntu 10.10. As far as i understand Rhythymbox should support this. When I plug the ipod in it shows up under the devices section of the menu, but after that I am unable to do anything with it. I can't see the songs that are already on it, I can't add new songs, I can't do anything. When i attempt to drag a song across, absolutely nothing happens. if i try the sync with library option, it shuts rhythymbox down completely. Any ideas would be greatly appreciated.

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• How should I trouble-shoot a frozen startup screen?

  - by Brian Dant

  The Problem: I'm running 10.04, and it suddenly started freezing after it boots. I can move the mouse, but I can't select anything. When the problem first started, there were only two things on the screen: 1. Gnome-Do 2. "Unlock Login Keyring" dialog box What I have done thus far: Asked myself if the keyboard was plugged in :-) Yes, it is. Tried to use ALT+F2 or CTRL+ALT+F1 per the "What Should I Do When Ubuntu Freezes" question. (Neither were responsive) Tried to reboot using the REISUB method (which did reboot, but I still had the same problem upon restart) Gnome-Do was in the autostart folder, and I removed it by deleting ~/.config/autostart/gnome-do.desktop Deleted my password keyring per this blog post Tried to kill and restart X with ALT+SysReq+K (Screen went black but X didn't restart) Tried to hit the Esc button What my screen is currently showing: My screen currently shows the "Choose password for new keyring" dialog box.

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• What Counts for a DBA: Humility

  - by drsql

  In football (the American sort, naturally,) there are a select group of players who really hope to never have their names called during the game. They are members of the offensive line, and their job is to protect other players so they can deliver the ball to the goal to score points. When you do hear their name called, it is usually because they made a mistake and the player that they were supposed to protect ended up flat on his back admiring the clouds in the sky instead of advancing towards the goal to scoring point. Even on the rare occasion their name is called for a good reason, it is usually because they were making up for a teammate who had made a mistake and they covered up for them. The role of offensive lineman is a very good analogy for the role of the admin DBA. As a DBA, you are called on to be barely visible and rarely heard, protecting the company data assets tenaciously, even though the enemies to our craft surround us on all sides:. Developers: Cries of ‘foul!’ often ensue when the DBA says that they want data integrity to be stringently enforced and that documentation is needed so they can support systems, mostly because every error occurrence in the enterprise will be initially blamed on the database and fall to the DBA to troubleshoot. Insisting too loudly may bring those cries of ‘foul’ that somewhat remind you of when your 2 year old daughter didn't want to go to bed. The result of this petulance is that the next "enemy" gets involved. Managers: The concerns that motivate DBAs to argue will not excite the kind of manager who gets his technical knowledge from a glossy magazine filled with buzzwords, charts, and pretty pictures. However, the other programmers in the organization will tickle the buzzword void with a stream of new-sounding ideas and technologies constantly, along with warnings that if we did care about data integrity and document things, the budget would explode! In contrast, the arguments for integrity of data and supportability tend to be about as exciting as watching grass grow, and far too many manager types seem to prefer to smoke it than watch it. Packaged Applications: The DBA is rarely given a chance to review a new application that is being demonstrated for the enterprise, and rarer still is the DBA that gets a veto of an application because the database it uses has clearly been created by an architect that won't read a data modeling book because he is already married. More often than not this leads to hours of work for the DBA trying to performance-tune a database with a menagerie of rules that must be followed to stay within the  application support agreement, such as no changing indexes on a third party schema even though there are 10 billion rows instead of the 10 thousand when the system was last optimized. Hardware Failures: Physical disks, networking devices, memory, and backup devices all come with a measure known as ‘mean time before failure’ and it is never listed in centuries or eons. More like years, and the term ‘mean’ indicates that half of the devices are expected to fail before that, which by my calendar means any hour of any day that it wants to fail it will. But the DBA sucks it up and does the task at hand with a humility that makes them nearly invisible to all but the most observant person in the organization. The best DBAs I know are so proactive in their relentless pursuit of perfection that they detect many of the bugs (which they seldom caused) in the system well before they become a problem. In the end the DBA gets noticed for one of same two reasons as the offensive lineman. You make a mistake, like dropping a critical production database that had never been backed up; or when a system crashes for any reason whatsoever and they are on the spot with troubleshooting and system restoration plans that have been well thought out, tested, and tested again. Not because there is any glory in it, but because it is what they do.   Note: The characteristics of the professions referred to in this blog are meant to be overstated stereotypes for humorous effect, and even some DBAs aren't quite this perfect. If you are reading this far and haven’t hand written a 10 page flaming comment about how you are a _______ and you aren’t like this, that is awesome. Not every situation applies to everyone, but if you have never worked with a bad packaged app, a magazine trained manager, programmers that aren’t team players, or hardware that occasionally failed, relax and go have a unicorn sandwich before you wake up.

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