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Articles indexed in September 2012

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• Why don't we use dynamic (server-side generated) CSS?

  - by ern0

  As server-side generated HTML is trivial (and it was the only way to make dynamic webpages before AJAX), server-side generated CSS is not. Actually, I've never seen it. There are CSS compilers, but they generate CSS files which can be used as static. Technically, it requires no special libraries, the HTML style tag should reference to the PHP(/ASP/whatever) templater script instead of the static CSS file, and the script should send out CSS content-type header - that's all. Does it have cache problems? I don't think so. The script should send out no-cache etc. headers. Is it problem for designers? No, they should edit the CSS template (as they edit the HTML template). Why we don't use dynamic CSS generators? Or if there's any, please let me know.

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• Unable to free space in /boot

  - by wadesworld

  Running: Linux ips-svf-1 3.0.0-22-server #36-Ubuntu SMP Tue Jun 12 17:56:20 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux I'm trying to free space in /boot with apt-get -y purge, but every time I run the command I get an error about unmet dependencies: sudo apt-get -y purge linux-headers-3.0.0-12 Reading package lists... Done Building dependency tree Reading state information... Done You might want to run 'apt-get -f install' to correct these: The following packages have unmet dependencies: linux-headers-3.0.0-12-server : Depends: linux-headers-3.0.0-12 but it is not going to be installed linux-image-server : Depends: linux-image-3.0.0-26-server but it is not going to be installed E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution). However, I can't run apt-get -f install since /boot is full. I also tried running dpkg --purge and dpkg --remove manually, but both give the same unmet dependency error. Any suggestions on how I can successfully free space in /boot? Is there anything I can delete with rm?

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• No Sound from Shared Media

  - by Travis

  I have a shared media folder that I have all of my mp3's in. When I try to play them using Ubuntu, I get no sound, but the media player (Rhythmbox, Exaile, etc) display that they are playing the file, it looks like everything is playing but no sound. I have checked and rechecked the volume levels of the system and each application and I see no issues. If I move a file to the local drive, it plays just fine. I do sound checks while the file is playing and I get audio (front left, front right) from the test but not from the media file that I am playing. Any help would be greatly appreciated.

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• Bash Script help required

  - by Sunil J

  I am trying to get this bash script that i found on a forum to work. Copied it to text editor. Saved it as script.sh chmod 700 and tried to run it. rootdir="/usr/share/malware" day=`date +%Y%m%d` url=`echo "wget -qO - http://lists.clean-mx.com/pipermail/viruswatch/$day/thread.html |\ awk '/\[Virus/'|tail -n 1|sed 's:\": :g' |\ awk '{print \"http://lists.clean-mx.com/pipermail/viruswatch/$day/\"$3}'"|sh` filename=`wget -qO - http://lists.clean-mx.com/pipermail/viruswatch/$day/thread.html |\ awk '/\[Virus/'|tail -n 1|sed 's:": :g' |awk '{print $3}'` links -dump $url$filename | awk '/Up/'|grep "TR\|exe" | awk '{print $2,$8,$10,$11,$12"\n"}' > $rootdir/>$filename dirname=`wget -qO - http://lists.clean-mx.com/pipermail/viruswatch/$day/thread.html |\ awk '/\[Virus/'|tail -n 1|sed 's:": :g' |awk '{print $3}'|sed 's:.html::g'` rm -rf $rootdir/$dirname mkdir $rootdir/$dirname cd $rootdir grep "exe$" $filename |awk '{print "wget \""$5"\""}' | sh ls *.exe | xargs md5 >> checksums mv *.exe $dirname rm -r $rootdir/*exe* mv checksums $rootdir/$dirname mv $filename $rootdir/$dirname I get the following message.. script.sh: line 11: /usr/share/malware/: Is a directory script.sh: line 11: links: command not found

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• http_proxy - not working with sudo [closed]

  - by Amil

  I am working on RHEL6 behind a proxy at my workplace. In order to make wget and other applications work, I modified my /etc/environment and added definitions for http_proxy, https_proxy, and ftp_proxy. I logged out and back in. As desired, wget works correctly. However, commands like sudo wget and sudo yum do not work. Upon further investigation, I see the reason is because my http_proxy settings are not being shown when I type "sudo env". In fact PATH is also reset. How can I get http_proxy to be set for sudo?

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• Nautilus and file command in 11.04 don't show metadata for WebM files

  - by Pili

  The file-name extension .webm is used for media files using the WebM multimedia format, which consists of the WebM container (a subset of the Matroska container) and audio and video streams with independet enconding and quality settings. Description of the issue: For files in the WebM format, the program file says that files are raw data, instead of determining and displaying the real file-format, which is WebM. Besides, Nautilus doesn't display the technical metadata of files in this format. Why is the file program not displaying the file format for WebM files?

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• WiFi can't connect after suspend

  - by CyberOPS

  I've had this problem since Ubuntu 11.10 (my first install) but I was able to get around this issue with this answer. After I installed Ubuntu 12.04.1 I tried to use the same fix as before but I couldn't get it to work. I've also tried a couple other different fixes I found around the web but they didn't work. Basically here's what happens: I can see all the networks in my area. When I try to connect to one of them it never connects, it keeps disconnecting. After a little bit it asks for the password again but its already filled in correctly. If I hit okay it will do the exact same thing again. So does anyone know how I can get this fixed? INFO: Computer: HP Pavilion dv6t-6b00 CTO Quad Edition Entertainment Notebook PC Network Card: Intel® Centrino® Wireless-N 1000 OS: Ubuntu 12.04.1 (x64) dual booting with Windows 7 (x64) (*Not using Wubi*) Wireless Card Driver: iwlwifi UPDATE: I was about to reinstall with the DVD I made with the ISO from the official source but discovered the same issue happens on the disc's Ubuntu preview feature. I still was unable to fix it as before. I also tried the Xubuntu demo, and the same. Re installing the driver hasn't worked either.

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• How can I troubleshoot flash player/hardware conflict?

  - by sparthikas

  OBJECTIVE: Have a web browser on my Ubuntu install that can play youtube and hulu videos. Also would like to understand problem so that I can fix it again if I change software. Workarounds welcome, technical understanding and solution preferable. SYMPTOMS: Flash does not run - cannot make the right-click menu appear, an empty box is where video should be, changes to black box when hovering over other links. The "The Adobe Flash plugin has crashed" message does not appear with its sad lego face. cannot activate proprietary graphics driver - causes system to reboot to a prompt. SOLUTIONS TRIED: Replaced OS (tried slackware 13.37, fedora 17, linuxmint 13 maya, gentoo, lubuntu, and even winXP. lubuntu confirmed to work, don't remember how much tweaking, if any, this required. Slack, fedora, mint, and gentoo all failed to run flash just like ubuntu) many reinstalls of flash player via different methods, including cleaning up old installs first, also tried gnash and lightspark. replaced graphics card (replaced HIS IceQ Radeon HD 4670 AGP with older GeForce 5700 LE no change in problem) flash does successfully work on winXP installation with Catalyst AGP hotfix driver applied, however I consider windows wholly unacceptable for web browsing due to lack of security. Lubuntu install also works, however I do not want to be tied down to just using Lubuntu on this computer. SYSINFO: Have latest versions of Ubuntu, Firefox, and Flash on fresh Ubuntu install. Using Gigabyte 7s748 motherboard with Athlon XP 2800+ and 3 GB of RAM with Radeon HD 4670 AGP card, also a Dell soundblaster live series sound card (due to malfunction of onboard sound on motherboard) Wired internet connection, Maxtor 6Y120L3 HDD, Sony DVD RW AW-Q170A, Dell M993s monitor. NOTES: I do not know if the graphics driver issue and the flash troubles are linked. Substitution of older graphics card having same flash troubles seems to suggest they aren't. My troubleshooting method is rather reductionist, consisting mainly of "replace things until you find out what was causing the error by process of elimination" only it seems that this must be a conflict which arises when software decides how to configure itself on my hardware. That is, I know the hardware can run Flash, and I know that on other systems the same software can too, but somehow the combination fails. Consequently I feel out of my depth. I will keep trying things off and on, but I have spent probably about 30 man-hours in the last 4 months working on this problem with no joy other than the lubuntu workaround. Any help will be appreciated, I will be checking back and posting updates. Any pertinent questions regarding me or my computer will be answered, outputs from config files can be accessed and posted (IDK which ones or what parts to post).

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• Hybrid Graphics on Ubuntu 12.04 switching to discrete

  - by cfstras

  I have a Sony Vaio VPCCB-27FX with hybrid graphics. Using vgaswitcheroo enables me to switch my discrete card off to save power. Now when i want to switch to the discrete card for performance, my system freezes. I already tried logging out and killing x with service lightdm stop, but still, it freezes as soon as I echo DIS > switch. typing blindly, echo IGD > switch returns me to my console where it reads [ 179.555171] i915: switched off, but it seems the discrete card never gets switched on... running echo DDIS > switch gives me the following: [540....] [drm:atop_op_jump] *ERROR* atombios stuck in loop for more than 5secs aborting [540....] [drm:atom_execute_table_locked] *ERROR* atombios stuck executing CEE2 (len 62, WS 0, PS 0) @ 0xCEFE [540....] [drm:atom_execute_table_locked] *ERROR* atombios stuck executing BBF6 (len 1036, WS 4, PS 0) @ 0xBCF3 [540....] [drm:atom_execute_table_locked] *ERROR* atombios stuck executing BB8C (len 76, WS 0, PS 0) @ 0xBB94 [541....] [drm:r600_RING_TEST] *ERROR* radeon: ring test failed (scratch(0x8504)=0xFFFFFFFF) [541....] [drm:evergreen_resume] *ERROR* evergreen startup failed on resume after that, the atombios part repeats a few times. also, the terminal locks up again and sysrq+REISUB is my only rescue. Has anybody an idea how I can switch to my discrete card without the system locking up? #uname -srvmpio Linux 3.2.0-24-generic #39-Ubuntu SMP Mon May 21 16:52:17 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux #lsb_release -r Description: Ubuntu 12.04 LTS

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• Google Analytics for subdomains

  - by Sebastian

  I have two WordPress multisites under one domain - city-x.domain.com and city-y.domain.com. domain.com is a landing page where you select your city, and a cookie will redirect the user to that city on subsequent visits. I'd like to be able to track the number of hits on all pages on domain.com, city-x.domain.com and city-y.domain.com separately and combined. How is this On a side note, I've heard that GA underestimates hits. As this is important for advertising purposes, is there a better free service?

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• Redirect a url to another url in IIS 7.5

  - by Jason White

  I have no idea why this isn't working. I've tried creating map rules and then rewritng and redirecting the url. I've tried just redirecting it with a simple rewrite rule and no matter what, the only time I can get it to work is if I set the match url to match this regex .*. I'm trying to redirect webmail.example.com to mail.example.com. Seemed like it would have taken but a couple seconds; boy was I wrong. I'm thinking I must be doing something wrong with the regex, but I'm not sure what as when I test it it seems to work fine. <rule name="webmail" patternSyntax="ECMAScript" stopProcessing="true"> <match url=".*webmail.*" /> <conditions logicalGrouping="MatchAll" trackAllCaptures="false"> </conditions> <action type="Redirect" url="https://mail.example.com:8000" appendQueryString="false" logRewrittenUrl="true" /> </rule> Thanks

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• Does using a country domain (TLD) negatively effect a site's search ranking if the site content isn't country specific?

  - by Alexizamerican

  I have a website in which the content is not country specific. The TLD is currently .it but the company is hosted and based in the United States. I'm wondering if a .it domain will negatively effect the site's search rankings. Is it better to use a .com TLD? For example (I don't actually own these domains), would the domain love.it have a worse ranking than loveit.com? (Assuming the content of the sites is the same) I've been searching everywhere for an answer with not much luck. Any advice would be very helpful.

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• Could crosslinking using very general anchor texts be a reason for a drop in rankings?

  - by webmasters

  I have crosslinked 20 sites and I thought I have been penalized for this, asked this question and some experienced members told me maybe that crosslinking may not necessarily be the reason. The sites are on same host, different C class IP and every site in linked to each other. Each site targets long tail kewords. Site 1 - BMW Used Cars - and my area Site 2 - WW Used Cars - and my area And so on... When I crosslinked them (in the sidebar), I did it for the users; instead of repeating the terms used cars and my location over and over (since my users are targeted) I just crosslinked them using the brand: BMW, WW. Targeting locally, my niches are not overly competitive, so I did not need to many external links to rank on various positions on the 1st page. I'm thinking that when I chose to link using only the brand, google might have thought I wanted to actually rank for BBW and WW, hence the drop in my targeted local traffic. Could this be? I now have no-followed the links and I am noticing a slight recovery, but if it's not a interlinking penalty it would be a shame not to benefit from my links.

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• Statistics for facebook like button

  - by bessarabov

  I have a small site with facebook like button. I want to find out the information about what pages are liked. I've found url http://graph.facebook.com/?id=http://imdb.com but it shows only overal count for the site. I think that I can ask http://graph.facebook.com/?ids=url1,url2 with all my pages as the parameters to get detailed information, but this seems to be an ugly solution. A have lots of pages, so I have to ask facebook many times. Maybe there is some simple way of finding the information I need?

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• Facebook Like button warning, but prevents sharing

  - by Steve

  I added a FB Like button to my Wordpress template, and when I click Like, I receive an error, which pops up and says: There was an error liking the page. If you are the page owner, please try running your page through the linter on the Facebook devsite (https://developers.facebook.com/tools/lint/) and fixing any errors. The Lint Checker (now) gives no Error or Warnings, after I removed a duplicate og:description tag. Why is it not working?

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• Design leaderboard ratings for quiz games

  - by PeterK

  Back in March 2011 i started the following post: How to design a leaderboard? Now my quiz game have been out for approximately a year and sold pretty decently. I am working on to update the game design and is again looking into the leaderboard design to make it better as i am not happy with it. Currently i rate players on number of correct answers, which is not good as it does not consider things like number of games, difficulty levels etc. I also have "extended" stats behind the UITableView (Leaderboard). A player can play based on three levels of difficulty: hard, medium or easy Difficulty levels can be mixed between players in a game Each game can be one to six players, so there can be single games or duels Between 2 and 30 questions per game As i am considering integrating Game Center Leaderboard i need to design a better rating system so i would like to ask for some ideas how to do the rating based on the above. I am thinking about how much a point would be worth and what it includes.

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• Sprite sheet generator

  - by Andrea Tucci

  I need to generate a sprite sheet with squared sprite for a 2D game. How can I generate a sprite sheet where each frame has x = y? The only think I have to do is to "insert" some blank space between sprites (in case y were x in the original sprite). Is there any program that I can use to trasform "irregular" sprite sheets to "squared" sprite sheets? An example of non-squared sprite sheet: http://spriters-resource.com/gameboy_advance/khcom/sheet/1138

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• Is it possible to update the livetile in XNA WP7 game?

  - by Jaakko Lipsanen

  ( I'm not sure if this question belongs here, but since it is related to game development and I have no idea where else I should post this, I will post this here ) As the title says, what I am basically asking is if it is possible to update the livetile of an pure XNA game ( not SL + XNA hybrid )? I've been thinking something like that whenever user launches the game, I would create an texture dynamically and then update the livetile to show that texture. Even better would be if I could schedule this code to run for example once a day, without requiring user to even launch the game. Is this possible in WP7 or in WP8 ( is the WP8 SDK even publicly released yet? ) in pure XNA game? What about in XNA + SL hybrid?

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• Learning XNA/Xbox Development [closed]

  - by CJ Sculti

  Possible Duplicate: How should I go about learning XNA? so I would like to get into Xbox game development (indie games.) The problem is I cant find ANY documentation or place to get started online. I was hoping someone here could point me in the right direction (tutorials or documentation.) I was also hoping someone could direct me to some kind of online course? (Paid or free.) I appreciate your time, thanks.

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• First-Time GLSL Shadow Mapping Problems

  - by Locke

  I'm working on building out a 2.5D engine and having massive problems getting my shadows working. I'm at a point where I'm VERY close. So, let's see a picture to see what I have: As you can see above, the image has lighting -- but the shadow map is displaying incorrectly. The shadow map is shown in the bottom left hand side of the screen as a normal 2D texture, so we can see what it looks like at any given time. If you notice, it appears that the shadows are generating backwards in the wrong direction -- I think. But the problem is a little more deep -- I'm just plotting the shadow onto the screen, which I know is wrong -- I'm ignoring the actual test to see if we NEED to show a shadow. The incoming parameters all appear to be correct -- so there has to be something wrong with my shader code somewhere. Here's what my code looks like: VERTEX: uniform mat4 LightModelViewProjectionMatrix; varying vec3 Normal; // The eye-space normal of the current vertex. varying vec4 LightCoordinate; // The texture coordinate of the light of the current vertex. varying vec3 LightDirection; // The eye-space direction of the light. void main() { Normal = normalize(gl_NormalMatrix * gl_Normal); LightDirection = normalize(gl_NormalMatrix * gl_LightSource[0].position.xyz); LightCoordinate = LightModelViewProjectionMatrix * gl_Vertex; LightCoordinate.xy = ( LightCoordinate.xy * 0.5 ) + 0.5; gl_Position = ftransform(); gl_TexCoord[0] = gl_MultiTexCoord0; } FRAGMENT: uniform sampler2D DiffuseMap; uniform sampler2D ShadowMap; varying vec3 Normal; // The eye-space normal of the current vertex. varying vec4 LightCoordinate; // The texture coordinate of the light of the current vertex. varying vec3 LightDirection; // The eye-space direction of the light. void main() { vec4 Texel = texture2D(DiffuseMap, vec2(gl_TexCoord[0])); // Directional lighting //Build ambient lighting vec4 AmbientElement = gl_LightSource[0].ambient; //Build diffuse lighting float Lambert = max(dot(Normal, LightDirection), 0.0); //max(abs(dot(Normal, LightDirection)), 0.0); vec4 DiffuseElement = ( gl_LightSource[0].diffuse * Lambert ); vec4 LightingColor = ( DiffuseElement + AmbientElement ); LightingColor.r = min(LightingColor.r, 1.0); LightingColor.g = min(LightingColor.g, 1.0); LightingColor.b = min(LightingColor.b, 1.0); LightingColor.a = min(LightingColor.a, 1.0); LightingColor *= Texel; //Everything up to this point is PERFECT // Shadow mapping // ------------------------------ vec4 ShadowCoordinate = LightCoordinate / LightCoordinate.w; float DistanceFromLight = texture2D( ShadowMap, ShadowCoordinate.st ).z; float DepthBias = 0.001; float ShadowFactor = 1.0; if( LightCoordinate.w > 0.0 ) { ShadowFactor = DistanceFromLight < ( ShadowCoordinate.z + DepthBias ) ? 0.5 : 1.0; } LightingColor.rgb *= ShadowFactor; //gl_FragColor = LightingColor; //Yes, I know this is wrong, but the line above (gl_FragColor = LightingColor;) produces the wrong effect gl_FragColor = LightingColor * texture2D( ShadowMap, ShadowCoordinate.st ); } I wanted to make sure the coordinates were correct for the shadow map -- so that's why you see it applied to the image as it is below. But the depth for each point seems to be wrong -- the shadows SHOULD be opposite (look at how the image is -- the shaded areas from normal lighting are facing the opposite direction of the shadows). Maybe my matrices are bad or something going in? They're isolated and appear to be correct -- nothing else is going in unusual. When I view from the light's view and get the MVP matrices for it, they're correct. EDIT: Added an image so you can see what happens when I do the correct command at the end of the GLSL: That's the image when the last line is just glFragColor = LightingColor; Maybe someone has some idea of what I screwed up?

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• Sharing a texture resource from DX11 to DX9 to WPF, need to wait for DeviceContext.Flush() to finish

  - by Rei Miyasaka

  I'm following these instructions on TheCodeProject for rendering from DirectX to WPF using D3DImage. The trouble is that now that I have no swap chain to call Present() on -- which according to the article shouldn't be a problem, but it definitely wasn't copying my back buffer. An additional step that I have to take before I can copy the texture to WPF is to share it with a second D3D9Ex device, since D3DImage only works with DX9 (which is understandable, as WPF is built on DX9). To that end, I've modified some SlimDX code to work with DirectX 11. I tried calling DeviceContext.Flush() (the Immediate one) at the end of each render cycle, which kind of works -- most of the time it'll show my renderings, but maybe for maybe 3 or 4 out of 60 frames each second, it'll draw my clear color instead. This makes sense -- Flush() is non-blocking; it doesn't wait for the GPU to do its thing the way SwapChain.Present does. Any idea what the proper solution is? I have a feeling it has something to do with my texture parameters for the back buffer, but I don't know.

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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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• Switching between multiple reports (.rdlc) in a single report viewer

  - by UserNameHere

  I have 2 reports, "report1.rdlc" and "report2.rdlc" and I want to be able to swap betweent the 2 of them in a single report viewer ("rv_1"). I also have 3 buttons: btn_1 which does: rv_1.LocalReport.ReportEmbeddedResource = "Application1.Report1.rdlc" rv_1.RefreshReport() btn_2 which does: rv_1.LocalReport.ReportEmbeddedResource = "Application1.Report2.rdlc" rv_1.RefreshReport() btn_3 which does: dim rds as new ReportDataSource rds.name = rds.value = rv_1.reset() rv_1.LocalReport.DataSources.add(rds) rv_1.RefreshReport() Now no matter what I put for rds.name and rds.value it leaves me with "A data source instance has not been supplied for the data source 'dataSetName_TableName'. So my question is; what do I need to put there in order to get this to work correctly?

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• Empty Structures compile in VB 10+

  - by Mark Hurd

  This is at least a documentation error, if not a bug. In VB.NET prior to .NET 4.0 (i.e. VB.NET 7 through 9) an empty Structure declaration fails at compile-time with error BC30281: Structure 'MySimpleEmpty' must contain at least one instance member variable or Event declaration. E.g. The following two structures compile successfully in VB10, and not prior: Structure MySimpleEmpty End Structure Public Structure AnotherEmpty Public Const StillEmpty As Boolean = True End Structure I note the documentation for the Error BC30281 stops at VB9, but the documentation for the Structure statement still has the datamemberdeclarations as required even as of VB11 (.NET 4.5 VS2012). These two Structures compile in VB11 (VS2012) as well. (Thanks John Woo.) Is there some blog entry or documentation confirming this is an intended change or a bug in VB10 and later?

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• Which language should I learn to create a sudoku game?

  - by Brandan

  I'd like to learn a new programming language, something besides all the scripting languages I've used for the past many years (Ruby, JavaScript, Perl, PHP, bash). I figured it might be interesting to make a sudoku game since there are plenty of documented algorithms and it only requires fairly simple data structures. It might start out as either a generator or a solver of puzzles, not necessarily both and not necessarily with a GUI. My goal is primarily to learn some new programming concepts beyond MVC and UI design, secondarily for this thing to be pretty fast. Is there a language that particularly shines for these sorts of constraint satisfaction problems? Is it suited to a functional language like Haskell or a highly concurrent language like Erlang (say for solving puzzles much larger than 9 x 9)? Or is this question mostly meaningless?

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