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• Change power button to 'Ask' in Xubuntu 13.10

  - by Gully.Moy

  I have recently installed Xubuntu 13.10 on my Vaio vpcea making me a Linux beginner. The problem is that laptop's power button is right on the edge of the bezel making it far too easy to press accidentally, in my opinion a design fault by Sony. At present, when I press the power button it shuts down strait away and as you can imagine, when I'm accidentally pressing it all the time it gets very annoying! So I planned to change it to ask what I would like to do when I press it or at least ask if I'm sure. So I went through the xfce GUI options "Settings Manager" - "Power Manager" to the field "When power button is pressed", but it was already set to "Ask". So I did some digging and found a thread telling me to navigate to /etc/xdg/xfce4/xfconf/xfce-perchannel-xml/xfce4-power-manager.xml where it said to find power-button-action and check that value="3". It already did. So I looked some more and found this thread which focuses on acpi scripts. I tried solution 1 & 2 using sudoedit to change the files accordingly (I have made executable bash shell scripts already so I think I followed them correctly), but still no difference. I also found this thread which instructed me to edit /etc/systemd/logind.conf so that HandlePowerKey=ignore. Still no luck. I even tried my own approach to completely disable /etc/acpi/powerbtn.sh by renaming it powerbtn.sh.bak hoping for at least no response from the power button... and I have done many reboots in between... but still it shuts down! I have also read that some people have the file /etc/acpi/events/power_button, but I do not. So does anyone have any other ideas? What else could be executing the shutdown sequence Is there something I'm missing? I haven't undone any of these actions so every one of the above files is currently edited on my computer, with the exception that "Solution 2" automatically undone "Solution 1" above. Thanks guys.

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• The How-To Geek Video Guide to Using Windows 7 Speech Recognition

  - by YatriTrivedi

  Ever get the desire to control your computer, Star Trek-style? With Windows 7’s Speech Recognition, it’s easier than you might think. Microsoft has been working on its voice command steadily over the years. XP introduced it, Vista smoothed it, and 7 has it polished. It’s strangely not advertised as a feature, even though other voice command and speech recognition programs are hundreds of dollars. It may not be as perfect as some of them, but there’s definitely something amazing about vocally telling your computer to do things and it actually working Latest Features How-To Geek ETC How To Create Your Own Custom ASCII Art from Any Image How To Process Camera Raw Without Paying for Adobe Photoshop How Do You Block Annoying Text Message (SMS) Spam? How to Use and Master the Notoriously Difficult Pen Tool in Photoshop HTG Explains: What Are the Differences Between All Those Audio Formats? How To Use Layer Masks and Vector Masks to Remove Complex Backgrounds in Photoshop Bring Summer Back to Your Desktop with the LandscapeTheme for Chrome and Iron The Prospector – Home Dash Extension Creates a Whole New Browsing Experience in Firefox KinEmote Links Kinect to Windows Why Nobody Reads Web Site Privacy Policies [Infographic] Asian Temple in the Snow Wallpaper 10 Weird Gaming Records from the Guinness Book

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• How old is "too old"?

  - by Dori

  I've been told that to be taken seriously as a job applicant, I should drop years of relevant experience off my résumé, remove the year I got my degree, or both. Or not even bother applying, because no one wants to hire programmers older than them.1 Or that I should found a company, not because I want to, or because I have a product I care about, but because that way I can get a job if/when my company is acquired. Or that I should focus more on management jobs (which I've successfully done in the past) because… well, they couldn't really explain this one, except the implication was that over a certain age you're a loser if you're still writing code. But I like writing code. Have you seen this? Is this only a local (Northern California) issue? If you've ever hired programmers:2 Of the résumés you've received, how old was the eldest applicant? What was the age of the oldest person you've interviewed? How old (when hired) was the oldest person you hired? How old is "too old" to employed as a programmer? 1 I'm assuming all applicants have equivalent applicable experience. This isn't about someone with three decades of COBOL applying for a Java guru job. 2 Yes, I know that (at least in the US) you aren't supposed to ask how old an applicant is. In my experience, though, you can get a general idea from a résumé.

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• How to access an encrypted INI file from C on an embedded system with little RAM

  - by Mawg

  I want to encrypt an INI file using a Delphi program on a Windows PC. Then I need to decrypt & access it in C on an embedded system with little RAM. I will do that once & fetch all info; I will not be consutinuously accessing the INI file whenever my program needs data from the file. Any advice as to which encryption to use? Nothing too heavyweight, just good enough for "Security through obscurity" and FOSS for both Delphi & C. And how can I decrypt, get all the info from the INI file - using as little RAM as possible, and then free any allocated RAM? I hope that someone can help. [Update] I am currently using an Atmel UC3, although I am not sure if that will be the final case. It has 512kB falsh & 128kB RAM. For an INI file, I am talking of max 8 sections, with a total of max 256 entries, each max 8 chars. I chose INI (but am not married to it), because i have had major problems in the past when the format of a data fiel changes, no matter whether binary, or text. For tex, I prefer the free format of INI (on PC), but suppose I could switch to line_1=data_1, line_2=data_2 and accept that if I add new fields in future software erleases they must come at the end, even if it is not pretty when read directly by humans. I suppose if I choose a fixed format text file then I never need get more than one line into RAM at a time ...

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• libgdx game not disposing

  - by Yesh

  My game does not exit entirely even after calling dispose() method. It loads a black screen when I launch it for the second time and works well if I kill the game manually and restart it. I get an error that says buffer not allocated with newUnsafeByteBuffer or already disposed when I try to dispose off the SpriteBatch object. This is were I suspect the problem to be. But not able to fix it entirely. Please help! Here is how I have built it (I have put the sample code here just to show you guys that there are no visible loop backs in dispose function, please correct me if I'm wrong)- In game screen, public void dispose() { AssetLoader.dispose(); render.dispose(); Gdx.app.exit(); } Under class AssetLoader- public void dispose(){ Texture.dispose(); sound.dispose(); } Under game render class - public void dispose(){ spritebatch.dispose(); //throws an error when I GameScreen.dispose is called font.dispose(); shaperender.dispose(); } I believe that my spritebatch isn't disposing which is causing the black screen but I cannot find a way to dispose it off successfully. Any help would be greatly appreciated.

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• Which of these design patterns is superior?

  - by durron597

  I find I tend to design class structures where several subclasses have nearly identical functionality, but one piece of it is different. So I write nearly all the code in the abstract class, and then create several subclasses to do the one different thing. Does this pattern have a name? Is this the best way for this sort of scenario? Option 1: public interface TaxCalc { String calcTaxes(); } public abstract class AbstractTaxCalc implements TaxCalc { // most constructors and fields are here public double calcTaxes(UserFinancials data) { // code double diffNumber = getNumber(data); // more code } abstract protected double getNumber(UserFinancials data); protected double initialTaxes(double grossIncome) { // code return initialNumber; } } public class SimpleTaxCalc extends AbstractCalc { protected double getNumber(UserFinancials data) { double temp = intialCalc(data.getGrossIncome()); // do other stuff return temp; } } public class FancyTaxCalc extends AbstractTaxCalc { protected double getNumber(UserFinancials data) { int temp = initialCalc(data.getGrossIncome()); // Do fancier math return temp; } } Option 2: This version is more like the Strategy pattern, and should be able to do essentially the same sorts of tasks. public class TaxCalcImpl implements TaxCalc { private final TaxMath worker; public DummyImpl(TaxMath worker) { this.worker = worker; } public double calcTaxes(UserFinancials data) { // code double analyzedDouble = initialNumber; int diffNumber = worker.getNumber(data, initialNumber); // more code } protected int initialTaxes(double grossIncome) { // code return initialNumber; } } public interface TaxMath { double getNumber(UserFinancials data, double initial); } Then I could do: TaxCalc dum = new TaxCalcImpl(new TaxMath() { @Override public double getNumber(UserFinancials data, double initial) { double temp = data.getGrossIncome(); // do math return temp; }); And I could make specific implementations of TaxMath for things I use a lot, or I could make a stateless singleton for certain kinds of workers I use a lot. So the question I'm asking is: Which of these patterns is superior, when, and why? Or, alternately, is there an even better third option?

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• USB Device first mounted as root, then by user

  - by Petr Marek

  When I connect my Kindle, it shows up as an usb0 media, which I can read but not write (owner = root). However, if I do sudo umount /media/usb0, usb0 gets unmounted and a Kindle media gets mounted properly (is writable etc.). What can cause such strange behavior? It's not only with Kindle, but with Flash drives etc. as well. My /etc/fstab: # /etc/fstab: static file system information. # # Use 'blkid' to print the universally unique identifier for a # device; this may be used with UUID= as a more robust way to name devices # that works even if disks are added and removed. See fstab(5). # # <file system> <mount point> <type> <options> <dump> <pass> proc /proc proc nodev,noexec,nosuid 0 0 # / was on /dev/sda2 during installation UUID=595815c2-d882-4ec8-a2cd-cce70471167c / ext4 errors=remount-ro 0 1 # /boot was on /dev/sda6 during installation #UUID=1340a336-66ca-4743-a6e4-41a307af2dda /boot ext4 defaults 0 3 # swap was on /dev/sda5 during installation UUID=afa49f1d-d505-4166-82a2-2f44548a48c6 none swap sw 0 0 UUID=deb86039-528a-45f3-b5f9-ce528740c94e /data_hdd ext4 defaults 0 2 My groups: petr@sova:~$ groups petr petr : petr adm cdrom sudo dip plugdev fuse lpadmin sambashare bumblebee

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• Can't boot into windows7/ubuntu 12.04 after running boot-repair

  - by Rini

  I have installed Ubuntu 12.04 on my preinstalled windows 7 Sony vaio E series laptop following instructions here: http://www.linuxbsdos.com/2012/05/17/how-to-dual-boot-ubuntu-12-04-and-windows-7/ Everything went well and I am able to boot in to windows after complete installation of Ubuntu. Now following instructions on web I tried to add Ubuntu to my BIOS using Easy BCD (but forget to add windows 7 entry). As a result, I loose windows 7 OS and can't boot in to either OS then I successfully repaired windows 7 using recovery CD. Now my problem is that I can't reinstall Ubuntu 12.04 using Live CD it halts every time before disk partition step giving error. "ubi-partman crashed". "ubi-partman failed with exit code 141. further information may be found in /var/log/syslog. Do you want to try running this step again before continuing? If you do not, your installation may fail entirely or may be broken." and, any choice to continue will result in the same error. After that following some post solutions I ran boot-repair commands in terminal ( in Try Ubuntu mode) and got the following URL: http://paste.ubuntu.com/1206434/ Now, after restart I can't boot into either Windows or Ubuntu. Even any attempt to run Windows repair is failed and I got the message : 'No operating System found' I don't know what went wrong after running boot-repair command. Please help in solving this issue. Thanks and Regards, R Shukla

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• Free ADF Training Event in the UK

  - by Grant Ronald

  At the UKOUG conference back in December, at the Tools Roundtable session someone told me that they hadn't chosen Oracle ADF as their development environement for their future projects.  When I asked why, the response I got was "no one told us about it".  I was pretty astounded (even gobsmacked!) that the technology that is the foundation of Oracle's future applications strategy wasn't on someone's radar. There and then I promised the audience that if the UKOUG was to fill a room, I would deliver a full day of free training on Oracle ADF and JDeveloper. And here it is!  On the 11th May 2011 at the UK Oracle office in Reading I will deliver a day packed from start to finish with all the best bits of Oracle ADF and JDeveloper.  I'll build an application from start to finish, business services, validation, web services, UI, page flow, maps, graphs and show you tips and techniques.  The event in primarily focused on those who are new to JDeveloper and Oracle ADF and is aimed at getting you up to speed as quickly as possible (so others don't make the mistake of not choosing ADF ;o) ). Places are limited and are open on a first come first served basis to UKOUG members, so get registered NOW!

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• links for 2010-05-11

  - by Bob Rhubart

  Fat Bloke: Oracle VM VirtualBox 3.1.8 released! "Supporting new platforms such as Ubuntu 10.04 (Lucid Lynx) and delivering a host of bugfixes, VirtualBox 3.1.8 is available now from the usual places, " says the Fat Bloke. (tags: oracle otn virtualization linux) Anthony Shorten: What is the Oracle Utilities Application Framework? "The Oracle Utilities Application Framework is a reusable, scalable and flexible java based framework which allows other products to be built, configured and implemented in a standard way," according to Anthony Shorten (tags: oracle otn framework java standards) Audio podcast: Oracle WebLogic Suite Virtualization Option (Application Grid) "Steve Harris, Senior Vice President of application server and Java Platform, Enterprise Edition development, talks about running Oracle WebLogic Server on Oracle JRockit Virtual Edition. Listen here to learn how you can run faster and more efficiently without a guest operating system on Oracle VM." (tags: oracle otn grid wweblogic podcast virtualization) MySQL Community Blog: MySQL track with free event at Kaleidoscope 2010 "The even greater news," writes Giuseppe Maxia, "is that, in addition to the general schedule, there are SUNDOWN SESSIONS!" (tags: java sun oracle mysql) @SOAtoday: Will Cloudsourcing Change the Face of Consulting? "Will we all be working remotely to deliver our client projects going forward? Maybe someday, but not anytime soon." -- Oracle ACE Director Jordan Braunstein (tags: oracle otn oracleace cloudcomputing entarch) @SOAtoday: Are we Paid to Say No? "Software architects take their governance initiatives seriously, and I can say with a high level of confidence that most of these denials are highly justified. But, have we architects lost our entrepreneurial spirit, with governance as our defense? Are we over-scrutinizing new ideas and slowing down pilots of innovation because they don’t align with our governance policies and enterprise frameworks?" -- Oracle ACE Director Jordan Braunstein (tags: architect entarch oracle otn soa)

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• Applying WCAG 2.0 to Non-Web ICT: second draft published from WCAG2ICT Task Force - for public review

  - by Peter Korn

  Last Thursday the W3C published an updated Working Draft of Guidance on Applying WCAG 2.0 to Non-Web Information and Communications Technologies. As I noted last July when the first draft was published, the motivation for this guidance comes from the Section 508 refresh draft, and also the European Mandate 376 draft, both of which seek to apply the WCAG 2.0 level A and AA Success Criteria to non-web ICT documents and software. This second Working Draft represents a major step forward in harmonization with the December 5th, 2012 Mandate 376 draft documents, including specifically Draft EN 301549 "European accessibility requirements for public procurement of ICT products and services". This work greatly increases the likelihood of harmonization between the European and American technical standards for accessibility, for web sites and web applications, non-web documents, and non-web software. As I noted last October at the European Policy Centre event: "The Accessibility Act – Ensuring access to goods and services across the EU", and again last month at the follow-up EPC event: "Accessibility - From European challenge to global opportunity", "There isn't a 'German Macular Degernation', a 'French Cerebral Palsy', an 'American Autism Spectrum Disorder'. Disabilities are part of the human condition. They’re not unique to any one country or geography – just like ICT. Even the built environment – phones, trains and cars – is the same worldwide. The definition of ‘accessible’ should be global – and the solutions should be too. Harmonization should be global, and not just EU-wide. It doesn’t make sense for the EU to have a different definition to the US or Japan." With these latest drafts from the W3C and Mandate 376 team, we've moved a major step forward toward that goal of a global "definition of 'accessible' ICT." I strongly encourage all interested parties to read the Call for Review, and to submit comments during the current review period, which runs through 15 February 2013. Comments should be sent to public-wcag2ict-comments-AT-w3.org. I want to thank my colleagues on the WCAG2ICT Task Force for the incredible time and energy and expertise they brought to this work - including particularly my co-authors Judy Brewer, Loïc Martínez Normand, Mike Pluke, Andi Snow-Weaver, and Gregg Vanderheiden; and the document editors Michael Cooper, and Andi Snow-Weaver.

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• How to practice object oriented programming?

  - by user1620696

  I've always programmed in procedural languages and currently I'm moving towards object orientation. The main problem I've faced is that I can't see a way to practice object orientation in an effective way. I'll explain my point. When I've learned PHP and C it was pretty easy to practice: it was just matter of choosing something and thinking about an algorithm for that thing. In PHP for example, it was matter os sitting down and thinking: "well, just to practice, let me build one application with an administration area where people can add products". This was pretty easy, it was matter of thinking of an algorithm to register some user, to login the user, and to add the products. Combining these with PHP features, it was a good way to practice. Now, in object orientation we have lots of additional things. It's not just a matter of thinking about an algorithm, but analysing requirements deeper, writing use cases, figuring out class diagrams, properties and methods, setting up dependency injection and lots of things. The main point is that in the way I've been learning object orientation it seems that a good design is crucial, while in procedural languages one vague idea was enough. I'm not saying that in procedural languages we can write good software without design, just that for sake of practicing it is feasible, while in object orientation it seems not feasible to go without a good design, even for practicing. This seems to be a problem, because if each time I'm going to practice I need to figure out tons of requirements, use cases and so on, it seems to become not a good way to become better at object orientation, because this requires me to have one whole idea for an app everytime I'm going to practice. Because of that, what's a good way to practice object orientation?

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• What deployment framework to use?

  - by jeruki

  We are trying to figure out what deployment method/framework to use with a python application, it has a basic wsgi server to make some REST resources available and a set of static web pages with the interface that are served through apache. The situation is as follows: My team works in isolated parts of the program and sometimes together in specific modules, we have different testing servers and one master server, we all work locally, sync the code using git, and then run a bash script that copies the files from the windows machines to the indicated linux server(using ssh) and then restarts the app. After thinking about it this doesn't seem to be the right way to do it, the script overwrites all the files in the server with the local files everytime. We want to be able to work in the same server without the worry of overwriting other people's code and we need to deploy to different servers to avoid restarting the service while others work with it and in the near future we need to deploy to the master or several clones of the master server when the application reaches a more mature state. We found serveral options capistrano, kwate, chef or fortress, even fleet but we wanted to have opinions from people that has used them to be sure it is what we need. So this are the main questions: Are these the kind of programs we should be looking at to achive a safe concurrent deployment process? Which one have you used/recommend and why? do you think it would help in our actual situation? Thank you so much for your feedback and advice on this.

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• Continual Professional Development - proving new skills to non-technical employers

  - by Tom

  Background I work in a non-IT based company, as a professional software developer, building a large scale internal database system. I am fortunate to have a fairly senior position within the company, and have been working here for around 4 years. Often I get asked by management "how do you learn new things?". To be honest, I don't know how to answer this. Over the last 6 months, I've really gotten my teeth into some new techniques and technologies to make my level of coding far better and hopefully improve the quality of the software. Even if it's just refreshing my skills on things I've learnt already. Like last week I dived into some complex XLinq and TPL code (.net). Nothing revolutionary, but I feel like I am a bit better than before. Question The question is, how do I prove this to my employer? It'd be nice to be able to put this on paper. Possibilities I could: Keep a journal of what I've learnt - keeping the technical bits in (nobody would understand or care, but it's better than them being omitted) ???? (I've run out of ideas already) Any ideas? Thanks, Tom

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• Can't use the hardware scissor any more, should I use the stencil buffer or manually clip sprites?

  - by Alex Ames

  I wrote a simple UI system for my game. There is a clip flag on my widgets that you can use to tell a widget to clip any children that try to draw outside their parent's box (for scrollboxes for example). The clip flag uses glScissor, which is fed an axis aligned rectangle. I just added arbitrary rotation and transformations to my widgets, so I can rotate or scale them however I want. Unfortunately, this breaks the scissor that I was using as now my clip rectangle might not be axis aligned. There are two ways I can think of to fix this: either by using the stencil buffer to define the drawable area, or by having a wrapper function around my sprite drawing function that will adjust the vertices and texture coords of the sprites being drawn based on the clipper on the top of a clipper stack. Of course, there may also be other options I can't think of (something fancy with shaders possibly?). I'm not sure which way to go at the moment. Changing the implementation of my scissor functions to use the stencil buffer probably requires the smallest change, but I'm not sure how much overhead that has compared to the coordinate adjusting or if the performance difference is even worth considering.

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• Memory concerns while plotting escape from DLL Hell in Delphi

  - by Peter Turner

  I work on a program with about 50 DLLs that are loaded from one executable, it's an old organically grown program where the only rationale for creating a new DLL is that one previously didn't exist to fill a given need. (and namespaces didn't exist in Delphi so it never crossed our mind to make dll1.main.pas, dll2.main.pas or something even more unique) What we want to do is consolidate all these DLLs into one executable, since none of them are used out of the program, there shouldn't be much of a problem. The concern my boss has is that if we did this, the memory overhead for terminal server clients would go through the roof. So, I've stepped through enough initialization code to know that lots of stuff is done every time a DLL is loaded in to memory, but say I've got a project with about 4000 files, and 50 dlls, 10 of which are probably utilized by any one user in any one session of the program. The 50 dlls are about 2/3rds form files, if not more, but beyond that there's not a lot of other resources being loaded (only a few embedded pictures, icons, cursors, etc..). If I loaded all these files in to memory, how much memory is used per unit? how much is used per class? How do I keep the overhead down? and what is the biggest project one can reasonably expect to build with Delphi? This tidbit won't help answering, but I think it might clarify what my boss is worried about, we currently start our program at about 18megs, normal working conditions are usually less than 40 megs, he thinks it could climb as high as 120 megs.

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• No NFC for the iPhone, and here's why

  - by David Dorf

  I, like many others in the retail industry, was hoping the iPhone 5 would include an NFC chip that enabled a mobile wallet.  In previous postings I've discussed the possible business case and the foreshadowing of Passbook, but it wasn't meant to be.  A few weeks ago I was considering all the rumors, and it suddenly occurred to me that it wasn't in Apple's best interest to support an NFC chip.  Yes they have patents in this area, but perhaps they are more defensive than indicating new development. Steve Jobs wanted to always win, but more importantly he didn't want others to win at his expense.  It drove him nuts that Windows was more successful than MacOS, and clearly he was bothered by Samsung and other handset manufacturers copying the iPhone.  But he was most angry at Google for their stewardship of Android. If the iPhone 5 had an NFC chip, who would benefit most?  Google Wallet is far and away the leader in NFC-based payments via mobile phones in the US.  Even without Steve at the helm, Apple isn't going to do anything to help Google.  Plus Apple doesn't like to do things in an open way -- then they lose control.  For example, you don't see iPhones with expandable memory, replaceable batteries, or USB connectors.  Adding a standards-based NFC chip just isn't in their nature. So I don't think Apple is holding back on the NFC chip for the 5S or 6.  It just isn't going to happen unless they can figure out how to prevent others from benefiting from it. All the other handset manufacturers will use NFC as a differentiator, which may be enough to keep Google and Isis afloat, and of course Square and PayPal aren't betting on NFC anyway.  This isn't the end of alternative payments, its just a major speed bump.

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• I'm tasked with leading the documentation effort for an existing, entirely undocumented, software product - what resources are there to help me?

  - by Ben Rose

  I'm a software developer at a technology company. I have been tasked with leading the documentation effort for the product I work on. The goal is to produce documentation internal to developer, and the project spills over into the business side, where it covers requirements documentation. This project is challenging. Specifically, I'm dealing with a product which: - has been around for a long time, at least 6 years. - has no form of documentation other than some small, outdated pieces here and there. - has comments in the code, but they are technical and do not convey any over-arching behavior (even on technical side). - as a consequence of having little to no documentation, is often unnecessarily complex under the covers In addition, we have not been given a lot of time to work on this project. I do not have any formal documentation or writing background, training, or experience. I have displayed some ability in writing/communication around the office, which may be why I was assigned to this project. Please share your advice or recommendation for resources to help me prepare and deal with this project. I'm looking for references to books/website/forums/whatever, to help me come up with the design of a plan with milestones, learn about best practices, task delegation, templates, buy-in, etc. I'm hoping specifically for resources targeting or giving special mention of introducing good documentation to existing, undocumented, projects. I would be very grateful for your responses. Ben

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• Compiz Fusion And Unity Tool

  - by David Michael Rice

  I tried to install compiz fusion on ubuntu studio 13 and all I got was this Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming. The following information may help to resolve the situation: The following packages have unmet dependencies: compiz-fusion-plugins-extra:i386 : Depends: compiz-core:i386 but it is not going to be installed Depends: compiz-fusion-plugins-main:i386 but it is not going to be installed Recommends: compizconfig-settings-manager:i386 but it is not going to be installed compiz-gnome : Depends: libcompizconfig0 but it is not going to be installed compizconfig-settings-manager : Depends: python-compizconfig (>= 1:0.9.9~daily13.04.18.1~13.04-0ubuntu1) but it is not going to be installed libcompizconfig-backend-gconf:i386 : Depends: libcompizconfig0:i386 but it is not going to be installed E: Unable to correct problems, you have held broken packages. david@Nebuchadnezzar:~$ Also I installed Unity tweak tool through the software center, and now I cannot find it at all, not even in search apps. I feel like every time I try to install something I have to jump through flaming hoops...

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• Moving my sprite in XNA using classes

  - by Tom

  Hey, im a newbie at this programming lark and its really frustrating me. I'm trying to move a snake in all directions while using classes. Ive created a vector2 for speed and ive attempted creating a method which moves the snake within the snake class. Now I'm confused and not sure what to do next. Appreciate any help. Thanks :D This is what i've done in terms of the method... public Vector2 direction() { Vector2 inputDirection = Vector2.Zero; if (Keyboard.GetState().IsKeyDown(Keys.Left)) inputDirection.X -= -1; if (Keyboard.GetState().IsKeyDown(Keys.Right)) inputDirection.X += 1; if (Keyboard.GetState().IsKeyDown(Keys.Up)) inputDirection.Y -= -1; if (Keyboard.GetState().IsKeyDown(Keys.Down)) inputDirection.Y += 1; return inputDirection * snakeSpeed; } Appreciate any help. Thanks :D EDIT: Well let me make everything clear. Im making a small basic game for an assignment. The game is similar to the old snake game on the old Nokia phones. I've created a snake class (even though I'm not sure whether this is needed because im only going to be having one moving sprite within the game). After I written the code above (in the snake class), the game ran with no errors but I couldn't actually move the image :( EDIT2: Thanks so much for everyones responses!!

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• Styles of games that work at low-resolution

  - by Brendan Long

  I'm taking a class on compilers, and the goal is to write a compiler for Meggy Jr devices (Arduino). The goal is just to make a simple compilers with loops and variables and stuff. Obviously, that's lame, so the "real goal" is to make an impressive game on the device. The problem is that it only has 64 pixels to work with (technically 72, but the top 8 are single-color and not part of the main display, so they're really only useful for displaying things like money). My problem is thinking of something to do on a device that small. It doesn't really matter if it's original, but it can't be something that's already available. My first idea was "snake", but that comes with the SDK. Same with a side-scrolling shooter. Remaining ideas include a tower defense game (hard to write, hard to control), an RPG (same), tetris (lame).. The problem is that all of the games I like require a high-resolution screen because they have a lot of text. Even a really simple game like nethack would be hard because each creature would be a single color. tl;dr What styles of games require a. No text; and b. Few enough objects that representing them each with a single color is acceptable?

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• What are some of the benefits of a "Micro-ORM"?

  - by Wayne M

  I've been looking into the so-called "Micro ORMs" like Dapper and (to a lesser extent as it relies on .NET 4.0) Massive as these might be easier to implement at work than a full-blown ORM since our current system is highly reliant on stored procedures and would require significant refactoring to work with an ORM like NHibernate or EF. What is the benefit of using one of these over a full-featured ORM? It seems like just a thin layer around a database connection that still forces you to write raw SQL - perhaps I'm wrong but I was always told the reason for ORMs in the first place is so you didn't have to write SQL, it could be automatically generated; especially for multi-table joins and mapping relationships between tables which are a pain to do in pure SQL but trivial with an ORM. For instance, looking at an example of Dapper: var connection = new SqlConnection(); // setup here... var person = connection.Query<Person>("select * from people where PersonId = @personId", new { PersonId = 42 }); How is that any different than using a handrolled ADO.NET data layer, except that you don't have to write the command, set the parameters and I suppose map the entity back using a Builder. It looks like you could even use a stored procedure call as the SQL string. Are there other tangible benefits that I'm missing here where a Micro ORM makes sense to use? I'm not really seeing how it's saving anything over the "old" way of using ADO.NET except maybe a few lines of code - you still have to write to figure out what SQL you need to execute (which can get hairy) and you still have to map relationships between tables (the part that IMHO ORMs help the most with).

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• Why do some bad websites rank well?

  - by BradB

  Consider the following scenario: you are pitching SEO/Website Optimisation to a prospective client and you explain to them the importance of great copy and content, how acquiring links (ethically) can increase page rank, why the quality of the HTML build matters (H1, H2 tags, w3c validation etc), why keyword research is beneficial, you may drop in a few Google Webmaster Guideline or Matt Cutts references to back up your claims and rubbish the "back hat" approach as being no longer effective for good measure. Your advice is ethical and in the eyes of best practices, spot on. Then, the client points out to you some of their long established competitors on Google and you see these competitor websites ranking in the top spots (1 to 3) for medium to highly competitive search phrases that your client wants to compete for. These websites totally contradict your ethical approach and pretty much violate every best practice previously noted. They even out perform other "white hat" competitors who are in accordance with the above guidelines. I experienced this today. One of these well ranking websites had: About six microsites with more or less the same copy and a slightly varied layout Little or not textual content I would almost say duplicate content across the sites, but there was so little of it it could barely qualify for being duplicate All the content in Flash (with a music track that kicked in on each page load, not so much of an SEO issue - but it helps paint the picture) Keyword stuffing behind the Flash file with a bunch of black text on black background in the style of keyword 1 keyword 2,keyword1,keyword 2,keyword 2 keyword 3 and so on... The exact keyword stuffed combination present on every page of the website A bunch of clearly self made links from poor quality forums and directories with little or no Page Rank Links exchanged across the microsites How do you explain your way out of this when this hard evidence is sat in front of you undermining your great pitch?

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• Is there any evidence that drugs can actually help programmers produce "better" code? [closed]

  - by sytycs

  I just read this quote from Steve Jobs: "Doing LSD was one of the two or three most important things I have done in my life." Also a quote from that article: He was hardly alone among computer scientists in his appreciation of hallucinogenics and their capacity to liberate human thought from the prison of the mind. Now I'm wondering if there's any evidence to support the theory that drugs can help make a "better" programmer. Has there ever been a study where programmers have been given drugs to see if they could produce "better" code? Is there a well-known programming concept or piece of code which originated from people who were on drugs? EDIT So I did a little more research and it turns out Dennis R. Wier actually documented how he took LSD to wrap his head around a coding project: "At one point in the project I could not get an overall viewpoint for the operation of the entire system. It really was too much for my brain to keep all the subtle aspects and processing nuances clear so I could get a processing and design overview. After struggling with this problem for a few weeks, I decided to use a little acid to see if it would enable a breakthrough, because otherwise, I would not be able to complete the project and be certain of a consistent overall design"[1] There is also an interesting article on wired about Kevin Herbet, who used LSD to solve tough technical problems and chemist Kary Mullis even said "...that LSD had helped him develop the polymerase chain reaction that helps amplify specific DNA sequences." [2]

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• Kent .Net/SqlServer User Group – Upcoming events

  - by Dave Ballantyne

  At the Kent user group we have two upcoming events.  Both are to be held at F-Keys Training suite http://f-keys.co.uk/ in Rochester, Kent. If you haven’t attended before please note the location here. 14-June Is your code S.O.L.I.D ? Nathan Gloyn Everybody keeps on about SOLID principles but what are they? and why should you care? This session is an introduction to SOLID and I'll aim to walk through each principle telling you about that principle and then show how a code base can be refactored using the principles to make your life easier, Come the end of the session you should have a basic understanding of the principle, why to use it and how using it can improve your code. Building composite applications with OpenRasta 3 Sebastien Lambla A wave of change is coming to Web development on .NET. Packaging technologies are bringing dependency management to .NET for the first time, streamlining development workflow and creating new possibilities for deployment and administration. The sky's the limit, and in this session we'll explore how open frameworks can help us leverage composition for the web. Register here for this event http://www.eventbrite.com/event/1643797643 05-July Tony Rogerson Achieving a throughput of 1.5Terabytes or over 92,000 8Kbyte of 100% random reads per second on kit costing less that 2.5K, and of course what to do with it! The session will focus on commodity kit and how it can be used within business to provide massive performance benefits at little cost. End to End Report Creation and Management using SQL Server Reporting Services  Chris Testa-O'NeillThis session will walk through the authoring, management and delivery of reports with a focus on the new features of Reporting Services 2008 R2. At the end of this session you will understand how to create a report in the new report designer. Be aware of the Report management options available and the delivery mechanisms that can be used to deliver reports. Register here for this event http://www.eventbrite.com/event/1643805667 Hope to see you at one or other ( or even both if you are that way inclined).

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