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  • box2d and constant movement

    - by Arnas
    i'm developing a game with a top down view, the players body is a circle. To move the character you need to tap on the screen and it moves to the spot. To achieve this i'm saving the coordinate of the touch and call a method every frame which applies linear velocity to the body with a vector of the direction the body should go _body->SetLinearVelocity(b2Vec2((a.x - currPos.x)/SPEED_RATIO,(size.height - a.y - currPos.y)/SPEED_RATIO)); //click position - current position, screen height - click position (since the y axis is flipped, (0,0) is in the bottom left ) - current position = vector of the direction we want to go now the problem with this is that the body slows down until it finally stops when getting closer to the point we want it to go, since the closer we are to that point the lenght of the vector gets smaller. Besides that i've read that it's bad practice to set linear velocity in box2d and i should use apply force instead, but that way the forces would add up and overshoot the target where it's supposed to stop. So what i'm asking is how to move a box2d body to a coordinate in constant speed.

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  • Wifi worked after reinstalling the driver, but why did it stopped working in the first place?

    - by Ankit
    I was having an issue with connecting to my wifi router since yesterday; could see the router in the wireless networks available but the router was not authenticating my password. I tried unblocking the hardware switches though non was blocked. Finally on discussing with the ISP i gave a re-installation of the wireless driver a try; and to my surprise that worked.(I was assuming faulty wifi router). So as per the subject of the question; I am very curious to know what actually happened that prevented me to connect to my wifi. Any logs that I could see to confirm the cause of this suspicious activity.

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  • Managed servers getting down regularly by Node Manager. WAD?

    - by csoto
    Recently I have been working on a service request where several instances were running, and several technologies were being used, including SOA, BAM, BPEL and others. At a first glance, this may seem to be a Node Manager problem. But on this situation, the problem was at JMS - Persistent Store level. Node Manager can automatically restart Managed Servers that have the "failed" health state, or have shut down unexpectedly due to a system crash or reboot. As a matter of fact, from the provided log files it was clear that the instance was becoming unhealthy because of a persist6ent Store problem. So finally, the problem here was not with Node Manager as it was working as designed, and the restart was being caused by the Persistent Store. After this Persistent Store problem was fixed, everuthing went fine. This particular issue that I worked was on an Exalogic machine, but note that this may happen on any hardware running Weblogic.

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  • Why C# is not statically typed but F# and Haskell are?

    - by ??????? ???????
    There was a talk given by Brian Hurt about advantages and disadvantages of static typing. Brian said that by static typing he don't mean C#, but F# and Haskell. Is it because of dynamic keyword added to C#-4.0? But this feature is relatively rarely useful. By the way, there are ? and unsafeCoerse in Haskell which obviously are not the same, but something that could blown your head off in runtime similarly like exception thrown as a result of dynamic. Finally, why F# and Haskell could be named a statically typed languages and C# couldn't?

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  • Make the Web Fast: Automagic site optimization with mod_pagespeed 1.0!

    Make the Web Fast: Automagic site optimization with mod_pagespeed 1.0! Ask and vote for questions at: bit.ly mod_pagespeed is an open-source Apache module that automatically optimizes web pages and resources on them: images, CSS, JavaScript, and much more. In this episode, we'll catch up with Joshua Marantz, the tech lead of the project at Google and talk about the history of mod_pagespeed, its fast growing adoption (130K+ sites!), technical architecture and how it works under the hood. Finally, we'll talk about the upcoming 1.0 release milestone for the project. If you're curious about mod_pagespeed, then this is definitely the show you won't want to miss! From: GoogleDevelopers Views: 0 0 ratings Time: 00:00 More in Science & Technology

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  • "// ..." comments at end of code block after } - good or bad?

    - by gablin
    I've often seen such comments be used: function foo() { ... } // foo while (...) { ... } // while if (...) { ... } // if and sometimes even as far as if (condition) { ... } // if (condition) I've never understood this practice and thus never applied it. If your code is so long that you need to know what this ending } is then perhaps you should consider splitting it up into separate functions. Also, most developers tools are able to jump to the matching bracket. And finally the last is, for me, a clear violation to the DRY principle; if you change the condition you would have to remember to change the comment as well (or else it could get messy for the maintainer, or even for you). So why do people use this? Should we use it, or is it bad practice?

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  • Frustrated by the VS2012 'Light' and 'Dark' themes?

    - by ihaynes
    Like me you may be have been frustrated by the lack of colour in VS2012. The flat look, reminicent of the early 'Gem' OS is bad enough, but when the only choices are a washed out white look or the deadly all-black look, it's not an easy product to work with.Fortunately MS themselves seem to have quietly taken notice of this, or at least one of their developers has, and a 'Color Theme Editor' extension has been released. This comes with some much better colour schemes (I'm using the blue one, which is fairly close to VS2010) and also allows you to create and edit themes youself.This extension doesn't come up when you search 'Extensions and Updates' but can be found at http://tinyurl.com/6rhkdejWith this, using VS2012 finally becomes a pleasurable experience.

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  • ERROR_PROCEDURE Does Not Return a Schema Name

    "A recent blog entry I read reminded me again that I wanted to rant about an issue in SQL Server for quite some time now. SQL Server 2005 introduced the separation between user and schema. Though schemata already existed before SQL Server 2005, they really became usable with this version, imho. At the same time TRY...CATCH was a new way for structured error handling introduced. And so it finally became possible…" NEW! SQL Monitor 2.0Monitor SQL Server Central's servers withRed Gate's new SQL Monitor.No installation required. Find out more.

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  • Somebody please help me, desperate... please

    - by Beast
    I followed a friend's advice and am using Ubuntu, and was enjoying it. I began to get system errors, tried to fix to no avail. It won't let me download anything to Ubuntu, saying unauthorized or untrusted software, or something. NOW MY CD DRIVE doesn't work! So I can't boot dban or anything via cd. Finally I bought a usb stick but it won't boot dban or anything. I'm about to just smash this with a hammer. Help me start over.

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  • xUnit global setup / teardown [migrated]

    - by Codism
    I need to run some code before any test is executed and also some code after all tests are done. I thought there must be some attributes or marker interface to indicate the global initialization and termination code but couldn't find them. Alternatively, if I can invoke xUnit programmatically, I can also achieve what I want to do by the following code: ... Main(string[] args) { try { MyGlobalSetup(); RunAllTests(); // What goes into this method? } finally { MyGlobalTeardown(); } } Can anyone provide me some hint about how to declaratively or programmally run some global setup/teardown code? Thanks

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  • Ubuntu touch on Nexus 4

    - by Dr. aNdRO
    I have finally managed to install the ubuntu touch on my nexus 4. Now the problem is its very Laggy. I have installed the "trusty" latest channel and its quite messy. Change background is not working. Dialer is really slow and everything is messed up. But I have seen many videos of nexus 4 and everything is working smoothly. So do I have to change to or pick any specific channel for installation? Please tell me is their any stable and properly working channel which I should choose for installation or what should I do?

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  • Make the Web Fast: Automagic site optimization with mod_pagespeed 1.0!

    Make the Web Fast: Automagic site optimization with mod_pagespeed 1.0! mod_pagespeed is an open-source Apache module that automatically optimizes web pages and resources on them: images, CSS, JavaScript, and much more. In this episode, we'll catch up with Joshua Marantz, the tech lead of the project at Google and talk about the history of mod_pagespeed, its fast growing adoption (130K+ sites!), technical architecture and how it works under the hood. Finally, we'll talk about the upcoming 1.0 release milestone for the project. If you're curious about mod_pagespeed, then this is definitely the show you won't want to miss! From: GoogleDevelopers Views: 2 0 ratings Time: 01:05:06 More in Science & Technology

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  • laptop suspend broken after latest kernel update

    - by Iestyn ap Mwg
    I ran a software update (Ubuntu 14.04) on my laptop over the weekend, which included an update from kernel 3.13.0-24 to 3.13.0-27, among other things. Today i had to take my laptop to work, so closed the lid and put it in my bag. However, it never went into suspend mode! I tried several times, even rebooting. Finally I tried the previous kernel from the grub menu (reverting back to the -24 one) and suspend works the same as it always had before. Did something suspend related change between the -24 and -27 kernels used in Ubuntu 14.04? I think by only reverting to a previous kernel to temporarily fix it, i've ruled out any other software changes made during the weekend's upgrade.

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  • Maximizing Your Windows 7: Tips and Tricks

    So you have finally decided to cave in to the pressure from all your friends and the positive reviews of the Windows 7 operating system. You re going to get it for yourself. Windows 7 offers many advantages to its users in terms of flexibility ease of use and simplicity. Now that you have it you will want to know how to maximize its use and all the features it provides. In this two-part series we will discuss several tips and tricks to help you get the most out of your newly-installed Windows 7 operating system.... Cloud Servers in Demand - GoGrid Start Small and Grow with Your Business. $0.10/hour

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  • What's the best web entrepeneur's conference to go on

    - by user4845
    Our dream as business partners was always to go to a conference overseas. Now that we can finally afford to, we have no clue of which one to go to. Which conference would you guys suggest from a web entrepeneur's point of view, if there were just one to go to? Perhaps something that included a bit of marketing, new thinking, innovation, inspiration. We were very keen on Google IO previously, but were concerned that it would be very Google product focused. Huge thanks!

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  • Can't connect to wireless without typing sudo modprobe b43 in terminal

    - by user90889
    I just upgraded to 12.04 on an old ACER Travelmate 5320 using Broadcom 4311. I wasn't able to connect to the internet through the wireless for a few days. It didn't even display wireless networks. I was finally able to make it work by following the instructions found here: http://linuxwireless.org/en/users/Drivers/b43#supported However, each time I log on to the computer I have to go to the terminal and type sudo modprobe b43 to make the wireless work. Is there somehow I can avoid this? I have used Ubuntu for many years but always relied on other people to help me with the technical stuff. The terminal is alien to me so I literally follow online forum instructions without knowing what I'm doing. Also, I tried many many things before I managed to make it work. So I'm worried I may have installed something that now conflicts with whatever the sudo modprobe b43 does. Thank you

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  • Is it possible to lose some directories when upgrading from 11.10 to 12.04?

    - by maythux
    Last day I upgraded my Ubuntu 11.10 desktop to Ubuntu 12.04. I was running a KVM virtual about 7 machines and managed by virt-manage software. Anyway when I finished upgrading I found that virt-manager is not working. So I had to reconfigure it again and install some other missing packages that was deleted! Eventually, I managed to solve this issue. Then I started to restore my virtual machines. I restored 2 machines without any problems. The third and fourth ones (Windows) made a check disk that lasted more that 6 hours but finally it worked. Other machines I can't find their attached hard disks. I don't know what happened but I can't find those files. Does upgrading delete files? Is there anyway to restore those files?

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  • Rendering of Oracle Secure Global Desktop's Administration Console on Modern Browser Versions

    - by Mohan Prabhala
    For customers using Oracle Secure Global Desktop version 4.6x, one of the issues reported is the improper rendering of the administration console when using modern browser versions such as Safari 5, Firefox 4+ or Internet Explorer 9. We are pleased to provide a fix for use of these modern browser versions when using Oracle Secure Global Desktop 4.6x. Please refer to Doc ID 1367923.1 on My Oracle Support. The solution involves a new .jar file, oracletheme.jar and following a few simple instructions. Download the new oracletheme.jar to /tmp and backup the existing one located at  /opt/tarantella/webserver/tomcat/<tomcat_ver>/webapps/sgdadmin/WEB-INF/lib/oracletheme.jar Stop the webserver  /opt/tarantella/bin/tarantella stop webserver Copy the new oracletheme.jar to the correct directory cp /tmp/oracletheme.jar /opt/tarantella/webserver/tomcat/<tomcat_ver>/webapps/sgdadmin/WEB- INF/lib/oracletheme.jar Verify permissions for the file -rw-r----- 1 root ttaserv 280449 Sep 9 2010 oracletheme.jar Finally, restart the webserver /opt/tarantella/bin/tarantella start webserver

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  • Partner case - ISE (Germany) - IDS brings light into Investment Controlling with Exadata

    - by Javier Puerta
    (Original post in German: IDS bringt mit Exadata Licht ins Investmentcontrolling) "The amount of data that IDS GmbH (Analysis and Reporting Services) has to cope with daily, is enormous: at the subsidiary of Allianz SE all the services are around Investment Controlling.The company needed an extensible data warehouse solution in which all the data could be merged together, harmonized and enriched. Finally IDS decided for Exadata to be as optimal solution, specifically the Oracle Exadata Database Machine. The implementation was carried out jointly with the Oracle Platinum Partner ISE, who took over the technical and advisory support part and will be IDS´ preffered consultant in any further Exadata development. See how Exadata is used and why this investment has paid off for IDS, by watching watching the following video (in German)"

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  • Certain Keyboard shortcuts not working

    - by user968808
    I have the logitech k800 keyboard but can't seem to get certain shortcuts working. I change in the keyboard shortcut settings volume up and down and it actually takes the key assignment but does not take effect when trying to use. After trying for a while I also tried to create a custom shortcut after with the command amixer -q sset Master 10%- Finally I tried changing the command to touch a file to see if it is actually responding but nothing. How can it take the key as an assignment in the shortcut settings but not to actually respond when pressing it. FYI other keys work like mute, next track etc. There is just 3 keys shortcuts not currently working. Thanks

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  • Application versioning

    - by Mathew
    Haven't find similar issue so sorry if thats a duplicate. I'm about to start a migration of an already existing project from one web container version to the another. Currently, the application version is 2.2.5. Business requirement is to deliver a 3.0 version by the end of the year. Additional constraint is to release a working, stable version by the end of Q3. We are about to work in 2-weeks sprints and I'm wondering how can I approach the problem? I was thinking about releasing 2.3 by the end of Q2, then immediately promoting it as 3.0-a1, work on alphas (3.0-a2, 3.0-a3, ...) till the end of Q3, to start with 3.0-b1 in the early Q4 and finally release 3.0 around December. I don't feel comfortable saying that the application is already in 3.0 state in July, but I can't see other options. If you find some book chapters/blogs or your personal experience interesting please share your opinion.

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  • Who could ask for more with LESS CSS? (Part 1 of 3&ndash;Features)

    - by ToStringTheory
    It wasn’t very long ago that I first began to get into CSS precompilers such as SASS (Syntactically Awesome Stylesheets) and LESS (The Dynamic Stylesheet Language) and I had been hooked on the idea since.  When I finally had a new project come up, I leapt at the opportunity to try out one of these languages. Introduction To be honest, I was hesitant at first to add either framework as I didn’t really know much more than what I had read on their homepages, and I didn’t like the idea of adding too much complexity to a project - I couldn’t guarantee I would be the only person to support it in the future. Thankfully, both of these languages just add things into CSS.  You don’t HAVE to know LESS or SASS to do anything, you can still do your old school CSS, and your output will be the same.  However, when you want to start doing more advanced things such as variables, mixins, and color functions, the functionality is all there for you to utilize. From what I had read, SASS has a few more features than LESS, which is why I initially tried to figure out how to incorporate it into a MVC 4 project. However, through my research, I couldn’t find a way to accomplish this without including some bit of the Ruby on Rails framework on the computer running it, and I hated the fact that I had to do that.  Besides SASS, there is little chance of me getting into the RoR framework, at least in the next couple years.  So in the end, I settled with using LESS. Features So, what can LESS (or SASS) do for you?  There are several reasons I have come to love it in the past few weeks. 1 – Constants Using LESS, you can finally declare a constant and use its value across an entire CSS file. The case that most people would be familiar with is colors.  Wanting to declare one or two color variables that comprise the theme of the site, and not have to retype out their specific hex code each time, but rather a variable name.  What’s great about this is that if you end up having to change it, you only have to change it in one place.  An important thing to note is that you aren’t limited to creating constants just for colors, but for strings and measurements as well. 2 – Inheritance This is a cool feature in my mind for simplicity and organization.  Both LESS and SASS allow you to place selectors within other selectors, and when it is compiled, the languages will break the rules out as necessary and keep the inheritance chain you created in the selectors. Example LESS Code: #header {   h1 {     font-size: 26px;     font-weight: bold;   }   p {     font-size: 12px;     a     {       text-decoration: none;       &:hover {         border-width: 1px       }     }   } } Example Compiled CSS: #header h1 {   font-size: 26px;   font-weight: bold; } #header p {   font-size: 12px; } #header p a {   text-decoration: none; } #header p a:hover {   border-width: 1px; } 3 - Mixins Mixins are where languages like this really shine.  The ability to mixin other definitions setup a parametric mixin.  There is really a lot of content in this area, so I would suggest looking at http://lesscss.org for more information.  One of the things I would suggest if you do begin to use LESS is to also grab the mixins.less file from the Twitter Bootstrap project.  This file already has a bunch of predefined mixins for things like border-radius with all of the browser specific prefixes.  This alone is of great use! 4 – Color Functions This is the last thing I wanted to point out as my final post in this series will be utilizing these functions in a more drawn out manner.  Both LESS and SASS provide functions for getting information from a color (R,G,B,H,S,L).  Using these, it is easy to define a primary color, and then darken or lighten it a little for your needs.  Example: Example LESS Code: @base-color: #111; @red:        #842210; #footer {   color: (@base-color + #003300);   border-left:  2px;   border-right: 2px;   border-color: desaturate(@red, 10%); } Example Compiled CSS: #footer {    color: #114411;    border-left:  2px;    border-right: 2px;    border-color: #7d2717; } I have found that these can be very useful and powerful when constructing a site theme. Conclusion I came across LESS and SASS when looking for the best way to implement some type of CSS variables for colors, because I hated having to do a Find and Replace in all of the files using the colors, and in some instances, you couldn’t just find/replace because of the color choices interfering with other colors (color to replace of #000, yet come colors existed like #0002bc).  So in many cases I would end up having to do a Find and manually check each one. In my next post, I am going to cover how I’ve come to set up these items and the structure for the items in the project, as well as the conventions that I have come to start using.  In the final post in the series, I will cover a neat little side project I built in LESS dealing with colors!

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  • UI font has rendering glitches in GNOME Shell

    - by user353889
    I don't really know how to describe this problem in English. A picture can say more words - look at the tabs at the top of the linked image. The current font settings are shown as well. I don't know what basic info I should provide so if something missing, please tell me. Ubuntu 12.04 GNOME Shell 3.4.1 I know, a reboot can make everything normal but I'm looking for a more permanent solution that can fix this problem (or bug). Update Thanks for Fitoschido, I finally know what keyword I could use for googling. I think it's a bug of gnome shell. https://bugs.archlinux.org/task/34847

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  • How is this "interface"-like structure/pattern called?

    - by Sebastian Negraszus
    Let's assume we have an XmlDoc class that contains basic functionality for dealing with an XML data structure and saving/loading data to/from a file. Now we have several subclasses, A, B and C. They all inherit from XmlDoc and add component-specific methods for setting and getting lots of data. They are like "interfaces" but also add an implementation for the signatures. Finally, we have an ABCDoc class that joins all the "interfaces" via virtual multiple inheritence and adds some ABCDoc-specific stuff, such as using XMLDoc-methods to set an appropriate doc type. We may also have an ADoc class for only saving A data. How is this pattern called? "Interface" is not really the right word since interfaces usually do not contain an implementation. Bonus points for C++ code conventions.

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  • USB key will only be mounted by gparted [?]

    - by user2413
    Hi, When I insert by usb key nothing happens (i.e. the drive is not visible). I can mount the USB drive from gparted though (and then it's suddenly recognized). It's not particular to any USB key. This only happens on my laptop (on the desktop the same key will be mounted upon plugging it in without any problems). Finally, the key is formated as fat32 and dosfstools and mtools are installed (through gparted claims otherwise). what's the catch? EDIT Also, gparted offers me the option to mount the key on "/" : shouldn't that be "/media" (or has this changed ?)

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