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  • Resolution independent physics

    - by user46877
    I'm making a game like Doodlejump but don't know how to make the physics scale on multiple resolutions. I also can't find anything related to this on Google. Right now I'm scaling the game using letterboxing and tested scaling the jump height with this code: gravity = graphics.getHeight() * 0.001f; jumpVel = graphics.getHeight() * -0.04f; ... velY += gravity; y += velY; But if I test this on my smartphone or emulator with different resolutions, I always get a slightly different jump height. I know that Farseer is resolution independent. How can I replicate this in my game? Thanks in advance.

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  • Bitdefender Safebox Offers 2GB Free Storage for Android Users

    - by Jason Fitzpatrick
    Android: If you’re always on the lookout for new–and free!–cloud storage solutions, security company BitDefender has a new cloud service for Android uers. Safebox accounts come with a free 2GB storage to get you started. For those of you in the “You can never have enough backups!” camp, Bitdefender’s Safebox is a new offering (currently only available for PC/Android setups) on the remote-storage market. Free personal accounts come with 2GB of storage which is on par with other cloud storage providers. If you’re looking for cloud storage with the maximum number of features and heavy third-party support you’ll want to stick with a well established player like Dropbox. If you’re just looking for some extra storage for overflow media or some redundancy for your current backup solution, Safebox is a viable storage solution. Bitdefender Safebox [via Addicted Tips] Make Your Own Windows 8 Start Button with Zero Memory Usage Reader Request: How To Repair Blurry Photos HTG Explains: What Can You Find in an Email Header?

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  • What's the best practice for async APIs that return futures on Scala?

    - by Maurício Linhares
    I have started a project to write an async PostgreSQL driver on Scala and to be async, I need to accept callbacks and use futures, but then accepting a callback and a future makes the code cumbersome because you always have to send a callback even if it is useless. Here's a test: "insert a row in the database" in { withHandler { (handler, future) => future.get(5, TimeUnit.SECONDS) handler.sendQuery( this.create ){ query => }.get( 5, TimeUnit.SECONDS ) handler.sendQuery( this.insert ){ query => }.get( 5, TimeUnit.SECONDS ).rowsAffected === 1 } } Sending the empty callback is horrible but I couldn't find a way to make it optional or anything like that, so right now I don't have a lot of ideas on how this external API should look like. It could be something like: handler.sendQuery( this.create ).addListener { query => println(query) } But then again, I'm not sure how people are organizing API's in this regard. Providing examples in other projects would also be great.

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  • Solid principles vs YAGNI

    - by KeesDijk
    When do the SOLID principles become YAGNI. As programmers we make trade-off's all the time, between complexity, maintainabillity, time to build and so forth.Amongst others. two of the smartest guidelines for making choices are in my mind the SOLID principles and YAGNI. If you don't need it, dont build it and keep it clean. Now for example when i watch the dimecast series on SOLID I see it start out as a fairly simple programm and ending up prettty complex (end yes complexity is also in the eye of the beholder) but it still makes me wonder, when do SOLID principles turn into something you don't need. All solid principles are ways of working that enable use te make changes at a later stage. But what if the problem to solve is a pretty simple one and it's a through away application, than what ? Or are the SOLID principles something that apply always ?

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  • Nucleus Research Note: Oracle's Focus on Usability in Fusion Applications

    - by mvaughan
    By Misha Vaughan, Applications User Experience I recently noticed that Nucleus Research Inc. released a research note summarizing their findings on Oracle Fusion Applications. It's always nice when an outside firm is savvy enough to acknowledge the value of a user experience strategy. When it is applied to what Oracle has done with Fusion Applications,  it's even more satisfying.  In the note, Nucleus states: "Based on the demos and testimonials from early adopters Nucleus has reviewed, Oracle has clearly focused on usability with in-application analytics and other smart application features.  "In Oracle Fusion Applications, Oracle has built not just transactional corporate applications where users enter and extract data, but smarter applications that driver user productivity." Read it for yourself here. Read more about the story behind Oracle's Fusion Applications User Experience here.

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  • Google I/O 2010 - Tips and tricks for Google Earth API and KML

    Google I/O 2010 - Tips and tricks for Google Earth API and KML Google I/O 2010 - Mapping in 3D: Tips and tricks for Google Earth API and KML Geo 201 Josh Livni, Mano Marks Google Earth and the Earth API can handle a tremendous amount of data. But you always have more. We will talk about integrating large datasets efficiently, coding for optimal performance, and taking advantage of advanced features in KML and the Earth API. For all I/O 2010 sessions, please go to code.google.com From: GoogleDevelopers Views: 14 0 ratings Time: 01:01:18 More in Science & Technology

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  • Printing multiple pages per sheet doesn't work

    - by Ricky Robinson
    In Ubuntu 12.04, I added a network printer which I had previously used without any problems on a different machine (with the same release of Ubuntu). Now, with the default generic driver installed, printing multiple pages per sheet from evince doesn't work properly. If I select 2 per sheet, be it long or short edge, it always prints 4. Why is this? It used to happen with non-pdf documents in the past, like from a browser. My workaround was to print to pdf file and then print the pdf itself. Now I'm clueless... Edit: the same happens with a different network printer, in which I installed the driver specific to its particular model.

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  • Where can I get a cheap database, no web hosting needed

    - by PhilipK
    I'm building an application which requires a fairly small online MySQL database. I don't need any web hosting. What are some cheap options for an online database? *Edit(a bit more about what I'll be using it for) The database itself is very small it contains market statistics for 5 weeks of time. Once a week the data will be updated, so that it always contains the most recent 5 weeks. Then I will use the data in that to create an XML file which is generated with PHP. The XML file will need to be accessed hundreds-thousands of times per month.*

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  • Fan control on Acer Aspire One D255 netbook

    - by AdamB
    I have Ubuntu netbook edition on my Acer Aspire One D255 netbook and I notice that I always hear the fan working at 100% despite the actual temperature. I run the sensors command its only at 13c, theres no reason why the fan needs to be running this hard at that temp. root@adam-netbook:~# sensors acpitz-virtual-0 Adapter: Virtual device temp1: +13.0°C (crit = +100.0°C) I'm guessing I may need some drivers in order to interact with the fan? Does anyone have any experience with this? It also seems that "sensors" may not be all that accurate, the temperature never seems to fluctuate.

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  • Firefox zombie process problem

    - by user52987
    When I start Firefox a Firefox zombie process starts sometimes (not always) and then goes away after a few seconds (stays sometimes until firefox is closed). This problem occurs with four computers (2 laptops and 2 desktops running ubuntu 10.04, 11.10, precise beta 1 and beta 2) I also have this same problem with other distros like Fedora 16, Linux mint 12, Debian 6 and Arch Linux. Thunderbird is also affected by this zombie process problem. Firefox safe mode does NOT help! Can someone help me to fix this problem? If you are affected by this bug please click "this bug affects me" on launchpad. My bug report (screenshot included)

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  • Anti-aliasing changed after update (or something...)

    - by Mussnoon
    The anti-aliasing of my system (of GTK?) has gone weird after I did one of two things - do a system update, and install gimp 2.7 beta. See images: Before: After: Before: After: Here's the current rendering comparison between Chromium, Firefox and Opera (in that order): Does anyone know how I can get the old anti-aliasing back? As far as I can tell, I never did anything special to achieve that before. It has always been on the default settings since I installed Lucid few months ago. Update: I have tried different settings (even though I knew they were already at the "best" settings) in appearance fonts ( details) but, as expected, any change there only makes things worse.

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  • Single database, multiple system dependency

    - by davenewza
    Consider an environment where we have a single, core database, with many separate systems using this one database. This leads to all of these systems have a common dependency, which ultimately introduces coupling between them. This means that we cannot always evolve systems independently of each other. Structural changes to the database (even if only intended for one, particular system), requires a full sweep test of ALL systems, and may require that other systems be 'patched' and subsequently released. This is especially tricky when you want to have separate teams working on different projects. What is a good 'pattern' to help in avoiding such coupling? I would imagine that a database should be exclusively depended on by one system. If other systems require data for whatever reason, they should request such from an API service of some kind. A drawback of this approach which comes to mind is performance: routing data between high-throughput systems through service calls is much slower than through a database connection.

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  • Resources for improving your comprehension of recursion?

    - by Andrew M
    I know what recursion is (when a patten reoccurs within itself, typically a function that calls itself on one of its lines, after a breakout conditional... right?), and I can understand recursive functions if I study them closely. My problem is, when I see new examples, I'm always initially confused. If I see a loop, or a mapping, zipping, nesting, polymorphic calling, and so on, I know what's going just by looking at it. When I see recursive code, my thought process is usually 'wtf is this?' followed by 'oh it's recursive' followed by 'I guess it must work, if they say it does.' So do you have any tips/plans/resources for building up your skills in this area? Recursion is kind of a wierd concept so I'm thinking the way to tackle it may be equally wierd and inobvious.

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  • FISL 12, Sao Jose Do Rio Preto, Brasilia, DFJUG, Goiania, and The Developers Conference, Sao Paolo

    - by arungupta
    Java EE 6/7 and GlassFish are visiting multiple cities in Brazil: Jun 26 - Jul 2 FISL 12, Porto Alegre Jul 3 Sao Jose Do Rio Preto JUG Jul 4 - 5 DFJUG Taguatinga, Brasilia and other venues Jul 6 - 7 Goiania JUG and other venues Jul 8 - 9 The Developers Conference, Sao Paolo Even though my main focus will be Java EE 6/7 and GlassFish but feel free to ask any question. There are several speakers from Oracle at FISL so stop by at the booth and talk to us. @paulojeronimo, with the help of the local community, organized a 10k run on the morning of Jul 5th. So please feel free to run along, should be fun. @raphaeladrien mentioned about some nice parks near my hotel in Goiania so you'll find me running there as well. There will be interesting discussions around different Web frameworks in Goiania. And then there are always 4 things to not miss in Brazil - Churrascaria, Guarana, Coffee, Caipirinha. Where will I see you ?

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  • FISL 12, Sao Jose Do Rio Preto, Brasilia, DFJUG, Goiania, and The Developers Conference, Sao Paolo

    - by arungupta
    Java EE 6/7 and GlassFish are visiting multiple cities in Brazil: Jun 26 - Jul 2 FISL 12, Porto Alegre Jul 3 Sao Jose Do Rio Preto JUG Jul 4 - 5 DFJUG Taguatinga, Brasilia and other venues Jul 6 - 7 Goiania JUG and other venues Jul 8 - 9 The Developers Conference, Sao Paolo Even though my main focus will be Java EE 6/7 and GlassFish but feel free to ask any question. There are several speakers from Oracle at FISL so stop by at the booth and talk to us. @paulojeronimo, with the help of the local community, organized a 10k run on the morning of Jul 5th. So please feel free to run along, should be fun. @raphaeladrien mentioned about some nice parks near my hotel in Goiania so you'll find me running there as well. There will be interesting discussions around different Web frameworks in Goiania. And then there are always 4 things to not miss in Brazil - Churrascaria, Guarana, Coffee, Caipirinha. Where will I see you ?

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  • Bash does not remember programs with non 0 exit status in history

    - by Amigable Clark Kant
    I enter a command. It fails. I press arrow up, modify something and enter it again ... hold it right there. It used to work like that. Now it's more like: I enter a command. It fails. I press arrow up, get the last command which didn't fail, likely "ls" or something useless and I type the whole thing again back by hand. What happened? It wasn't always like this. But it's quite some time since this behavior changed, I'll give you that. Some years ago, at least. How do I put some sanity back into my bash prompt?

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  • Custom per domain CSS in Internet Explorer

    - by Damiqib
    We have an old web app, which would be much more usable if it could be visually tweaked a bit. Being in a corporate environment - IE (always using the latest version) is all I can use. Also app in question being 3rd-party - there's no way to change it's own CSS files. Is there a way to use per domain injected custom CSS in internet Explorer. Let's say I want to change the background-color of domain http://oldapp.localintranet/ - is there any way to make this happen? Place to put a custom.css-file? With an add-on/extension?

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  • JS and CSS caching issue: possibly .htaccess related

    - by adamturtle
    I've been using the HTML5 Boilerplate for some web projects for a while now and have noticed the following issue cropping up on some sites. My CSS and JS files, when loaded by the browser, are being renamed to things like: ce.52b8fd529e8142bdb6c4f9e7f55aaec0.modernizr-1,o7,omin,l.js …in the case of modernizr-1.7.min.js The pattern always seems to add ce. or cc. in front of the filename. I'm not sure what's causing this, and it's frustrating since when I make updates to those files, the same old cached file is being loaded. I have to explicitly call modernizr-1.7.min.js?v=2 or something similar to get it to re-cache. I'd like to scrap it altogether but it still happens even when .htaccess is empty. Any ideas? Is anyone else experiencing this issue?

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  • Designing Algorithm Flowchart Application

    - by l46kok
    I need to develop an GUI application in C# where users can freely add conditional/statement blocks on the algorithm flowchart like the one shown below. By freely, I mean users can add a block on wherever the arrows are. I'm having some problems brainstorming how to approach this problem, especially what to choose for my datastructure to store the blocks. I was thinking LinkedList since everything follows a linear fashion and every node always has a head and tail, but the If/Else block (ba) has two branches (heads) to store, so this complicates things a little bit. How would a smart one approach problems like this? My apologies if this question isn't suited for Programmers stackexchange, but this is more of a conceptual problem rather than implementation problem so I figured this place was appropriate for the question.

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  • OpenGL-ES: clearing the alpha of the FrameBufferObject

    - by MrDatabase
    This question is a follow-up to Texture artifacts on iPad How does one "clear the alpha of the render texture frameBufferObject"? I've searched around here, StackOverflow and various search engines but no luck. I've tried a few things... for example calling GlClear(GL_COLOR_BUFFER_BIT) at the beginning of my render loop... but it doesn't seem to make a difference. Any help is appreciated since I'm still new to OpenGL. Cheers! p.s. I read on SO and in Apple's documentation that GlClear should always be called at the beginning of the renderLoop. Agree? Disagree? Here's where I read this: http://stackoverflow.com/questions/2538662/how-does-glclear-improve-performance

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  • Block elements vs inline elements in HTML: why the distinction?

    - by EpsilonVector
    The distinction between block and inline elements always seemed strange to me. The whole difference is that a block element takes up the entire width thus forcing a line break before and after the element, and an inline element only takes up as much as the content. Why not just have one type of element- an inline element where you can also apply custom height/width, and use that? You want line breaks? Insert a <br />, or maybe add a special tag in the CSS for that behavior. The way it's now, I don't see it solving any problem, and instead it only forces a property that in my opinion should be decided by a designer. So why the two types?

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  • Why partners should visit the new AutoVue Knowledge Zone

    - by [email protected]
    Learn more about AutoVue and connect with your peers to distinguish your offerings, seize opportunities, and to increase your sales! Explore the latest releases, integration solution offerings, marketing assets, partner enablement tools, events and latest partner initiatives by clicking through the tabs - Why Partner, Develop, Sell, and Connect. Knowledge Zones are designed to accelerate the partner's knowledge about Oracle solutions, as well as provide new opportunities to collaborate with the entire Oracle partner ecosystem. The AutoVue Knowledge Zone, launched in March 2010, is continuously being updated with the latest information to better equip and enable our partners to sell AutoVue solutions. Get all the information you always wanted to convert your sales opportunities into wins. Check out and bookmark the AutoVue Knowledge Zone now!

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  • How and where do you store your private work/sourcecode?

    - by Amir Rezaei
    I have worked as a developer for over 10 years now. During that time I have had my own small projects where I have developed tools, applications and games. I have not found any robust solution to store my work. It’s always fun to get back to your code and see how you did before and how you would do it now. It’s just work that is unfortunate to lose. There are SVN solution such as Google’s Project Hosting. However I’m not interested in sharing my code or making it open source. Currently I’m hosting my own SVN server. So here comes my question: How and where do you store your private work/sourcecode? Requirements: Sourcecode versioning Backup Prefers free Edit: Remote access Edit: I have used Dropbox + TrueCrypt + SVN. Unfortunately you are limited to 5gb.

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  • Enumerating the Future With Reactive Extensions

    Iterating over a collection of items seems like a pretty straightforward mundane concept. I dont know about you, but I dont spend the typical day thinking about the mechanics of iteration, much like I dont spend a lot of time thinking about how a roll of toilet paper is made. At least I didnt until watching Elmo Potty Time with my son. Now I think about it all the time, but I digress. Historically, Ive always thought of iteration as an action over a static set of items. You have this collection...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • How to manage primary key while updating [migrated]

    - by Subin Jacob
    In the following table primaryKeyColumn is primary key. To maintain the data history I always uses the values with WHERE condition(WHERE StatusColumn=1) And will set the StatusColumn to 0 if the data is edited (So that I could keep the previous data). But the problem is, if I update it to 0 , I can't insert the same key to primarykeycolumn since the column validated for primary keys. How can I manage these kind of validations? what the mistake I did in this design? primaryKeyColumn ValueColumn StatusColumn ---------------- ----------- ------------ 2 Name1 1 3 Name2 1 4 Name3 0

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