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  • Video capture Performance

    - by volting
    I have noticed high CPU utilization in a number of applications (except mplayer) which read from the embedded webcam on my laptop. Bizarrely CPU utilization varies proportionately to the level of illumination present. I know that that high CPU usage has nothing to do with rendering the video, as I have written a simple app using the OpenCV library to simply grab frames from the webcam, and cpu usage is still high. I think that mplayer might be using my GPU (and the other apps aren't), but since its not an issue with rendering, I dont think this explains anything. Cheese Low light --- ~12% CPU Bright Light ---- ~63% CPU Camorama Low light --- ~7% CPU Bright Light ---- ~30% CPU Opencv C++ library, (display in a single highgui window) Low light --- ~13% CPU Bright Light ---- ~40% CPU (same test on windows 7, 4-9%) Mplayer No problem, 1-2% regardless of light levels Note: If all I want't to do is capture a feed from my webcam I would use mplayer and forget about it, but I'm developing an application which uses the OpenCV to capture a video feed among other things, performance is important.

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  • Attachment handling for web application with Jackrabbit

    - by Andrea Girardi
    I need to manage attachments on my Spring web application and I thought to use an open source repository. My app it's a job approval system using J2EE / SPRING 3 Framework and Postgress DB to allow user to tracks the job,right through every step of the approval process. It is a fully managed, collaborative system that operates from a central server and is accessed by a standard internet browser. An user should be able to add an attach to a request or an approval step, so, I though to use Jackrabbit with Postgres database persistence manager. I took a look to this post: http://onjava.com/pub/a/onjava/2006/10/04/what-is-java-content-repository.html?page=1 It's really interesting but, I've some question about this kind of solution :- I seen that Jackrabbit standalone as a Derby database embedded solution for persistence, is it enough for a professional use of the repository with more than 50 request / days (with attachment) ? Is there a reason for which I should use another database manager for persistence instead of the default one ?

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  • La galerie Android d'Amazon génère trois fois plus de revenus que Google Play, selon Flurry

    La galerie Android d'Amazon génère trois fois plus de revenus que Google Play selon Flurry Google tirerait moins de profit de la vente d'applications pour son écosystème Android que ces concurrents. D'après une récente étude réalisée par le cabinet d'analyse d'applications mobiles Flurry, sur la capacité pour les développeurs de générer des revenus à travers les galeries d'applications majeures, il en ressort qu'Amazon génère plus de revenus avec sa galerie Android que Google. En fixant à 100 % les revenus générés par l'App Store d'Apple qui est utilisé comme référence, puis en les comparants avec ceux générés par l'Appstore Amazon et Google Play, Flurry a constaté que pou...

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  • Render full-screen gradient or texture

    - by Filip Skakun
    What's the simplest way to fill the background of the screen with a gradient or a texture in Direct3D 10/11? I'm building a Windows 8 metro app in which the camera never moves and I render some content in D3D, but I need to fill the background with something else than a solid color. Do I need to figure out the size and position of a rectangle and position it in 3D space or can I have some simpler solution? I don't care about depth at all, I don't use any depth buffer since all my content is sorted back to front, so I could just start by drawing to the background.

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  • How does apt-btrfs-snapshot work?

    - by Oli
    I read on the planet that apt-btrfs-snapshot would be available for Natty. The brief description of what it does sounds very nice: it will automatically create filesystem snapshot (of everything but /home) when apt installs/removes/upgrades. With the apt-btrfs-snapshot cli app its easy to list/remove/rollback the snapshots But before I convert my entire life to btrfs for the sole purpose of gaining a built-in backup system, can anybody tell me how btrfs's snapshots work. To my layman's brain, it sounds like this would eat a devastating amount of disk space if you're taking snapshots every time you install or upgrade something (I do this more than once a day). I assume the system is smarter than I'm allowing it but I really don't know. How do the snapshots work?

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  • Inside the Raspberry Pi Factory

    - by Jason Fitzpatrick
    Curious where your pint-sized Raspberry Pi came from? You might be surprised to learn it was built, tested, and packaged all in an equally pint-sized factory in South Wales. Nick Heath of Tech Republic takes us on a photo tour of the Raspberry Pi factory with a stop at each stage of production and testing. The photo above shows one of the manual construction steps, the insertion of the large components such as the USB and Ethernet ports. Hit up the link below for the full tour. Raspberry Pi: Inside the Pi Factory [Tech Republic] Our Geek Trivia App for Windows 8 is Now Available Everywhere How To Boot Your Android Phone or Tablet Into Safe Mode HTG Explains: Does Your Android Phone Need an Antivirus?

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  • Microsoft Forcing Dev/Partners Hands on Win 8 Through Certification

    - by D'Arcy Lussier
    I remember 2.5 years ago when Microsoft dropped a bomb on the Microsoft Partner community: all Gold competencies would require .NET 4 based premiere certifications (MCPD). Problem was, this gave a window of about 6 months for partners to update their employees’ certifications. At the place I was working, I put together an aggressive plan and we were able to attain the certs needed. Microsoft is always open that the certification requirements will change as the industry changes. .NET 1.0 certifications are useless here in 2012, and rightfully so they’ve been retired for a long time now. But now we’re seeing a new tactic by Microsoft – shifting gears away from certifications that speak to what industry needs and more to the Windows 8 agenda. Consider that currently the premiere development certification is the Microsoft Certified Professional Developer, which comes in three flavours – Web, Windows, and Azure. All require WCF and Data Access exams, as well as one that deals with the associated base technologies (ASP.NET, WinForms/WPF, Azure), and one that ties all three together in a solution-based exam. For Microsoft-based organizations, these skills aren’t just valid but necessary in building Microsoft applications. But the MCPD is being replaced with our old friend Microsoft Certified Solutions Developer (MCSD). So far, Microsoft has only released two types of MCSD – Web and Windows Store Apps. Windows Store Apps?! In a push to move developers to create WinRT-based applications, desktop development is now considered a second-class citizen in the eyes of Redmond. Also interesting are the language options for the exams: HTML5 and C#. Sorry VB folks, its time to embrace curly braces whether they be JavaScript or C#. Consider too the skills being assessed for the Windows Store Apps: Get your MCSD: Windows Store Apps Using HTML5 Get your MCSD: Windows Store Apps Using C# *Image Source: http://www.microsoft.com/learning/en/us/certification/mcsd-windows-store-apps.aspx Nov 21/2012 If you look at the skills being tested in each exam, you’ll find that skills like WCF and Data Access are downplayed compared to things like integrating Charms, facilitating Search, programming for the microphone and camera – all very Windows 8 focussed items. Where this becomes maddening is that Microsoft is still pushing Windows 7 with enterprise clients. According to a ZDNet article, Microsoft wants to see Windows 7 on 70% of enterprise desktops by mid 2013. Assuming they somehow meet that (its a pretty lofty goal), there’s years of traditional desktop-based development that will still be required at some level. For those thinking they’ll just write and stick with the MCPD certification, note that most exams that go towards that certification will be retired at the end of July 2013! (Read the small print). And while details haven’t been finalized, its a safe bet that MCPD certifications eventually won’t count towards Gold-level competencies in the Microsoft Partner program. What this means for Microsoft Partners and Developers is that certification for desktop development is going to be limited to Windows Store Apps unless Microsoft re-introduces a traditional desktop (WPF) based MCSD cert. Web Application Development – It’s Not All Bad There’s big changes on the web side of certification, but I actually see these changes as being for the good! Check out the new exam requirements for MCSD – Web Applications: Get your MCSD: Web Applications certification *Image Source: http://www.microsoft.com/learning/en/us/certification/cert-mcsd-web-applications.aspx Nov 21, 2012 We now *start* with HTML5, JavaScript, and CSS3! Now I’m sure that these will be slanted towards web development in IE, and I can hear designers everywhere bemoaning the CSS/IE combination. Still, I applaud Microsoft for adopting HTML5 as the go-to web technology and requiring certified developers to prove they have skills in the basics of web dev. The fact that the second exam clearly states “MVC Web Applications” shows that Web Forms is truly legacy and deprecated. That’s not to say there aren’t those out there that are still supporting or (for whatever reason) doing new dev with Web Forms, but this move by Microsoft is telling the community they better get on the MVC bandwagon if they want to stay current. Fantastic! And of course Azure needs to be here as well, and this is where the Microsoft agenda fits in. It’s no secret that there’s been a huge push in getting developers on to Azure. I don’t see this as being a bad thing either, as cloud computing (whether Azure, private, or 3rd party) is a necessary skill for developers to have here in 2012. The cynic in me realizes that the HTML5/JavaScript/CSS push wouldn’t be as prominent though if not for the Windows 8 Store App play, where HTML5 is a first class citizen (and an available language for the MCSD Windows Store App cert). In this case, the desktop developers loss is the web developers gain. Get Ready for Changes In addition to the changes in certifications, the Microsoft Partner competencies are going through changes as well. Web and Software Development are being merged into a single competency, meaning that licenses you would have received from having both as Gold are reduced. Other competencies are either being removed or changed, as are the exam requirements. In the same way that we’re seeing faster release cycles from Microsoft, so too will we see the Microsoft Partner Program and MS Certifications evolve faster than ever before. Many of us got caught in the last wave of changes, but this time we can see the wave coming – and it looks pretty big!

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  • Mac OS X Mountain Lion disponible en version Golden Master pour les développeurs

    Mac OS X Mountain Lion disponible en version Golden Master pour les développeurs Mise à jour du 11/07/2012 Apple a publié une version pour les développeurs de la prochaine mise à jour majeure de son système d'exploitation Mac OS X Mountain Lion. La version Golden Master (correspondant à la version RTM chez Microsoft) marque une étape importante dans le processus de développement de l'OS dont la version publique sera disponible à la fin de ce mois. La mise à jour Mac OS X Mountain Lion sera téléchargeable sur le Mac App Store pour un prix prévu de 19,99 dollars ou 15,99 dollars, et sera disponible...

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  • Wrapping up an Exciting Mobile World Congress

    - by Jacob Lehrbaum
    Its been a busy week here in Barcelona, with noticeably more energy at the show than in 2010. This year, we decided to move the Java booth to the App Planet and really engage with the increasing number of developers that are attending the event. Our booth featured 10 demos and a series of nearly 25 workshops featuring a variety of topics ranging from information about Java Verified, to the use of web technologies with Java ME, to sessions hosted by Operators such as Orange and Telefonica (see image to the left).One of the more popular topics in our booth was the use of Java in the Smart Grid. In our booth we were showing off some of the work of the Hydra Consortium whose goal it is to leverage the emerging smart grid infrastructure to securely enable the delivery of personal health data (weight, blood pressure, etc) from the home to your doctor. If you'd like to learn more about this innovative project, you can watch a video that was filmed at the event featuring Charles Palmer of Onzo. If you'd like to learn more about Java in the Smart Grid, check out our on-demand webinar

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  • Problem installing Oracle 10g Express edition

    - by abhi
    I have installed Oracle 10g Express edition in Ubuntu 10.10 and it doesn't show or ask to give my password during installation. When I click on "start database" it gave the warning "Operation failed, abhi is not a member of 'dba' group." and when clink on "Run SQL command line" it shows /usr/lib/oracle/xe/app/oracle/product/10.2.0/server/bin/nls_lang.sh: 114: [[: not found When I click on "GOTO Database home page", it opens Mozilla's "Ubuntu Google search page". Can anyone help me get my Oracle to work or tell me how to remove that because it is also not getting removed. I tried all the commands that are given as suggestions by Ubuntu. Please help me because I don't want to format my Ubuntu.

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  • WIn API Basic Paint program

    - by Tom Burman
    Just trying to learn a bit of Win API. Im trying to make a basic drawing app, a bit like MS Paint. For the time being im trying to get one function to work which is, when you left click and drag the mouse around the screen a line is drawn behind the mouse. Heres what i have so far, but for some reason: 1) the line starts drawing straight away rather then waiting for the left click 2) the line isn't solid its very dotty. case WM_MOUSEMOVE: { if(MK_LBUTTON){ hdc = GetDC(hwnd); hPen = CreatePen(PS_SOLID,5,RGB(0, 0, 255)); SelectObject(hdc, hPen); int x = LOWORD(lParam); int y = HIWORD(lParam); MoveToEx(hdc,x,y,NULL); LineTo(hdc, LOWORD(lParam), HIWORD(lParam)); ReleaseDC(hwnd,hdc); } else break; } } Thanks for any help!

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  • On what basis would you split donation money among your open source team members without any strife?

    - by Vigneshwaran
    I am a developer of an open source project which is hosted in SourceForge. It started out as a little app then after some releases, it got more and more popular and it started consuming more time and responsibility from me. So I have enabled the donation option in SourceForge. I'm passionate to continue developing it for free but if (ever) any money comes in, how should I split it with my team? Should I split the amount equally among the number of team members? (50-50 as it is two-member team now) Number of classes, commits or any other valuable submissions by team members? Any other idea? What would you do in such situation? Please give your opinions. I hope this question will be useful for others.

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  • An error has occurred when creating debian packaging

    - by Clepto
    i execute quickly share and i get Launchpad connection is ok ........ Command returned some WARNINGS: ---------------------------------- WARNING: the following files are not recognized by DistUtilsExtra.auto: mangar/.bzr/README mangar/.bzr/branch-format mangar/.bzr/branch/branch.conf mangar/.bzr/branch/format mangar/.bzr/branch/last-revision mangar/.bzr/branch/tags mangar/.bzr/checkout/conflicts mangar/.bzr/checkout/dirstate mangar/.bzr/checkout/format mangar/.bzr/checkout/views mangar/.bzr/repository/format mangar/.bzr/repository/pack-names ---------------------------------- An error has occurred when creating debian packaging ERROR: can't create or update ubuntu package ERROR: share command failed Aborting the previous time i run the command everything worked! the previous time i was using ubuntu but now i am using linux mint 13... i get the same error with quickly package! i need to package my app for the contest.. edit: now i get this too ---------------------------------- ERROR: Python module helpers not found ERROR: Python module Window not found ERROR: Python module mangarconfig not found ERROR: Python module Builder not found those files exist in the package_lib folder, why it cannot find them?

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  • Nodemanager Init.d Script

    - by john.graves(at)oracle.com
    I’ve seen many of these floating around.  This is my favourite on an Ubuntu based machine. Just throw it into the /etc/init.d directory and update the following lines: export MW_HOME=/opt/app/wls10.3.4 user='weblogic' Then run: update-rc.d nodemanager default Everything else should be ok for 10.3.4. #!/bin/sh # ### BEGIN INIT INFO # Provides: nodemanager # Required-Start: # Required-Stop: # Default-Start: 2 3 4 5 # Default-Stop: 0 1 6 # Short-Description: WebLogic Nodemanager ### END INIT INFO # nodemgr Oracle Weblogic NodeManager service # # chkconfig: 345 85 15 # description: Oracle Weblogic NodeManager service # ### BEGIN INIT INFO # Provides: nodemgr # Required-Start: $network $local_fs # Required-Stop: # Should-Start: # Should-Stop: # Default-Start: 3 4 5 # Default-Stop: 0 1 2 6 # Short-Description: Oracle Weblogic NodeManager service. # Description: Starts and stops Oracle Weblogic NodeManager. ### END INIT INFO # Source function library. . /lib/lsb/init-functions # set Weblogic environment defining CLASSPATH and LD_LIBRARY_PATH # to start/stop various components. export MW_HOME=/opt/app/wls10.3.4 # # Note: # The setWLSEnv.sh not only does a good job of setting the environment, # but also advertises the fact explicitly in the console! Silence it. # . $MW_HOME/wlserver_10.3/server/bin/setWLSEnv.sh > /dev/null # set NodeManager environment export NodeManagerHome=$WL_HOME/common/nodemanager NodeManagerLockFile=$NodeManagerHome/nodemanager.log.lck # check JAVA_HOME if [ -z ${JAVA_HOME:-} ]; then export JAVA_HOME=/opt/sun/products/java/jdk1.6.0_18 fi exec=$MW_HOME/wlserver_10.3/server/bin/startNodeManager.sh prog='nodemanager' user='weblogic' is_nodemgr_running() { local nodemgr_cnt=`ps -ef | \ grep -i 'java ' | \ grep -i ' weblogic.NodeManager ' | \ grep -v grep | \ wc -l` echo $nodemgr_cnt } get_nodemgr_pid() { nodemgr_pid=0 if [ `is_nodemgr_running` -eq 1 ]; then nodemgr_pid=`ps -ef | \ grep -i 'java ' | \ grep -i ' weblogic.NodeManager ' | \ grep -v grep | \ tr -s ' ' | \ cut -d' ' -f2` fi echo $nodemgr_pid } check_nodemgr_status () { local retval=0 local nodemgr_cnt=`is_nodemgr_running` if [ $nodemgr_cnt -eq 0 ]; then if [ -f $NodeManagerLockFile ]; then retval=2 else retval=3 fi elif [ $nodemgr_cnt -gt 1 ]; then retval=4 else retval=0 fi echo $retval } start() { ulimit -n 65535 [ -x $exec ] || exit 5 echo -n $"Starting $prog: " su $user -c "$exec &" retval=$? echo return $retval } stop() { echo -n $"Stopping $prog: " kill -s 9 `get_nodemgr_pid` &> /dev/null retval=$? echo [ $retval -eq 0 ] && rm -f $NodeManagerLockFile return $retval } restart() { stop start } reload() { restart } force_reload() { restart } rh_status() { local retval=`check_nodemgr_status` if [ $retval -eq 0 ]; then echo "$prog (pid:`get_nodemgr_pid`) is running..." elif [ $retval -eq 4 ]; then echo "Multiple instances of $prog are running..." else echo "$prog is stopped" fi return $retval } rh_status_q() { rh_status >/dev/null 2>&1 } case "$1" in start) rh_status_q && exit 0 $1 ;; stop) rh_status_q || exit 0 $1 ;; restart) $1 ;; reload) rh_status_q || exit 7 $1 ;; force-reload) force_reload ;; status) rh_status ;; condrestart|try-restart) rh_status_q || exit 0 restart ;; *) echo -n "Usage: $0 {" echo -n "start|" echo -n "stop|" echo -n "status|" echo -n "restart|" echo -n "condrestart|" echo -n "try-restart|" echo -n "reload|" echo -n "force-reload" echo "}" exit 2 esac exit $? .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; }

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  • Choosing a crossplatform for mobile development

    - by Mech0z
    I am creating a enterprise project and will develop the app for WP, Android and IPhone (Maybe also tablets) I have then done some research of what solutions are out there and have narrowed my choice down to 3 platforms (Due to my requirement to work with Bluetooth) The biggest requirement other than Bluetooth is the need to create good interfaces and module programming so its easy to maintain the whole solution, other than that I would like to use C# but its not a real requirement, but if the difference between 2 platforms is very small then it might tip the scale. Mono (MonoTouch, Mono for android) PhoneGap RhoMobile From my understanding then PhoneGap is not suited for business apps and I am not entirely sure why, but it seems like a platform made for speed rather than long term developement, not sure how true this is. RhoMobile is made for enterprice and might suit my needs, but not sure if its a good platform Anyone with insight that care to share their opinion Mono is C#, seems to be very mature and I found MvvmCross which should help organize the project

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  • Should a poll framework be closed sourced

    - by samquo
    I was having a chat with a coworker who is working on a polling app and framework. He was asking technical questions and I suggested he open source the application to get more quality opinions from developers who are interested in this problem and are willing to give it heavy though. He has a different point of view which I think is still valid so I want to open this question for discussion here. He says he believes something like a polling framework should not be open sourced because it will reduce its security and validity as people reveal loopholes through which they can cheat. Can't say I completely disagree. I see a somewhat valid point there, but I always believed that solutions by a group of people are almost always better than a solution thought by a single person asking a small number of coworkers, no matter how smart that person is. Again I'm willing to accept that maybe some types of applications are different. Does anyone have an argument in his favor? I'd really like to present your responses to him.

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  • Safe project development - free repositories

    - by friko
    Some time ago we started a private hobby project. We made a project on javaforge.com, created an svn repository and started developing our app. Right now we are really far with our project, but somehow we never worried if our project is really safe on such free development tool like javaforge ? I mean, what if our project would earn some money and the source code become valuable ? Could it be stolen or could somebody take it over ? We want to be sure that we are not wasting our time and want to be really sure about our project safety. Is it possible to safely develop a project in such free repository ? We would like also to start using redmine, so if you know any safe place for moving our project, please take this under consideration. Thanks a lot.

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  • How to remove java.sql.BatchUpdateException in Grails? [closed]

    - by aman.nepid
    I have a domain like this: class BusinessOrganization { static hasMany = [organizationBusinessTypes:OrganizationBusinessType] String name String icon static constraints = { name(blank:false,unique:true) icon(unique:true) } String toString() { return "${name}" } } When I save some data for first time it works fine. But when by the next time it shows this error : Error 500: Internal Server Error URI /nLocatePortal/businessOrganization/save Class java.sql.BatchUpdateException Message Batch entry 0 insert into business_organization (version, icon, name, id) values ('0', '', 'dddd', '2') was aborted. Call getNextException to see the cause. **Around line 24 of grails-app/controllers/com/nlocate/portal/BusinessOrganizationController.groovy** 21: 22: def save() { 23: def businessOrganizationInstance = new BusinessOrganization(params) 24: if (!businessOrganizationInstance.save(flush: true)) { 25: render(view: "create", model: [businessOrganizationInstance: businessOrganizationInstance]) 26: return 27: } Please someone help me why this is happening. I am new to Grails. I have not modified the controllers but still I get this error.

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  • How to structure a set of RESTful URLs

    - by meetamit
    Kind of a REST lightweight here... Wondering which url scheme is more appropriate for a stock market data app (BTW, all queries will be GETs as the client doesn't modify data): Scheme 1 examples: /stocks/ABC/news /indexes/XYZ/news /stocks/ABC/time_series/daily /stocks/ABC/time_series/weekly /groups/ABC/time_series/daily /groups/ABC/time_series/weekly Scheme 2 examples: /news/stock/ABC /news/index/XYZ /time_series/stock/ABC/daily /time_series/stock/ABC/weekly /time_series/index/XYZ/daily /time_series/index/XYZ/weekly Scheme 3 examples: /news/stock/ABC /news/index/XYZ /time_series/daily/stock/ABC /time_series/weekly/stock/ABC /time_series/daily/index/XYZ /time_series/weekly/index/XYZ Scheme 4: Something else??? The point is that for any data being requested, the url needs to encapsulate whether an item is a Stock or an Index. And, with all the RESTful talk about resources I'm confused about whether my primary resource is the stock & index or the time_series & news. Sorry if this is a silly question :/ Thanks!

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  • How to add a subclass to a viewcontroller in storyboard

    - by Ken Barlo
    Here's what I've created I created a view controller element (in storyboard) I created a new viewcontroller .h and .m file Here's my issue Can't seem to figure out how to get the content that I've added to the .m file to show up on the view controller element in the storyboard once the app is launched and the selection for that view controller element is made in the iPhone simulator. Although I am able to see content that is already added to a .m file on the home screen and activity screen when the selection is made in the iPhone simulator. Hope that makes sense, if not please ask and I'll be more than happy to provide more info.

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  • Direct Code Support?

    - by Josh Kahane
    A few times in the past I've hit a major wall and simply couldn't progress with a certain aspect of an app as Im a beginner and still learning the ropes (Objective-C specifically). I was curious if anyone knows of any services which support programmers in real time, paid or free and will over video, audio or text chat sit and work a problem out till its fixed and look through your code? I understand Stackoverflow does a super job at this! However Im in need of something a little more tailored where someone can spend a little time to sit and look and what Im dealing with and delve into my a code if need be. Thanks.

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  • The Chemistry of Fireworks [Video]

    - by Jason Fitzpatrick
    Fireworks are the dazzling and loud end result of complex chemical process. Watch this video to see the chemistry behind a fireworks display explained by none other than the father of modern pyrotechnics, John Conkling. Courtesy of Bytesize Science: From the sizzle of the fuse to the boom and burst of colors, this video brings you all of the exciting sights and sounds of Fourth of July fireworks, plus a little chemical knowhow. The video features John A. Conkling, Ph.D., who literally wrote the book on fireworks — he is the author of The Chemistry of Pyrotechnics, Basic Principles and Theory. Conkling shows how the familiar rockets and other neat products that light up the night sky all represent chemistry in action. [via Geeks Are Sexy] How to Use an Xbox 360 Controller On Your Windows PC Download the Official How-To Geek Trivia App for Windows 8 How to Banish Duplicate Photos with VisiPic

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  • The 10 Best How-To Geek Guides for Perfect Christmas Photos

    - by Eric Z Goodnight
    Taking a lot of pictures this Christmas? Here’s a roundup of some of our favorite How-Tos to help you get the best possible photo prints this year. You might use Photoshop, Free Software, or even Microsoft Word; How-To Geek has something for every user in this collection of How-Tos to help you get the best prints this holiday season Latest Features How-To Geek ETC The Complete List of iPad Tips, Tricks, and Tutorials The 50 Best Registry Hacks that Make Windows Better The How-To Geek Holiday Gift Guide (Geeky Stuff We Like) LCD? LED? Plasma? The How-To Geek Guide to HDTV Technology The How-To Geek Guide to Learning Photoshop, Part 8: Filters Improve Digital Photography by Calibrating Your Monitor MTCrypt Is an Efficient Front End for Mounting TrueCrypt Volumes 10 Things You Should Do with Your New Android Phone Walking Through the Park on a Snowy Night Wallpaper Track Weather Conditions with the Weather Underground Web App for Chrome These 8-Bit Mario Wood Magnets Put Video Games on Your Fridge Christmas Themes 4 Pack for Chrome and Iron Browser

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  • How to you prevent someone from getting a "new free trial period" by just creating a new login?

    - by Clay Nichols
    I am considering several options for the Trial version of our web app. The one I favor the most is the classic trial period. Of course, it's a LOT easier for someone to hack this system. They can defeat the various methods of fingerprinting the user, thusly: Browser cookie: Clear their cookies completely (or just for our site) or use a different device. Although Evercookie may help with the former. Email address: Create a new login (with a new email address) I'm going to monitor things for a while and just see how it goes. If it's a problem I'll consider requiring a credit card number matched to a name and billing zip code. Each such "ID constellation" would be considered one user. Someone could still have multiple credit card numbers but we could flag the same name+zipcode coming up again. Are there any better ways to do this?

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  • How important is using the same language for client and server?

    - by Makita
    I have been evaluating architecture solutions for a mobile project that will have a web-service/app in addition to native apps and have been looking at various libraries, frameworks, and stacks like Meteor, this being a sort of "open stack package framework", is tightly bound with Node.js. There is a lot of talk about the benefits of using the same language both client and server side, and I'm not getting it. I could understand if you want to mirror the entire state of a web application on both client and server but struggling to find other wins... Workflow efficiency? I'm trying to understand why client/server language parity is considered to be a holy grail. Why does client/server language parity matter in software development?

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