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• XML: Multiple roots + text content outside the root. Does anyone do it?

  - by Jeffrey Sweeney

  I have another one of those "is it done in XML" questions (my last one about xml comments hasn't been answered if anyone has a good explanation) I was just wondering if anyone, anywhere would: Use multiple root elements in an XML document Put text content outside of a root element W3C discourages these practices, Javascript's DOMParser doesn't even allow these cases, and I can't think of one sane reason to do either of these things. However, I know how bizarre some implementations of XML have been, so I wouldn't be surprised. Does anyone have any real world examples where this would be done? I will also accept an answer that specifies if other mainstream parsers allow doing either of these.

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• Detecting long held keys on keyboard

  - by Robinson Joaquin

  I just want to ask if can I check for "KEY"(keyboard) that is HOLD/PRESSED for a long time, because I am to create a clone of breakout with air hockey for 2 different human players. Here's the list of my concern: Do I need other/ 3rd party library for KEY HOLDS? Is multi-threading needed? I don't know anything about this multi-threading stuff and I don't think about using one(I'm just a NEWBIE). One more thing, what if the two players pressed their respective key at the same time, how can I program to avoid error or worse one player's key is prioritized first before the the key of the other. example: Player 1 = W for UP & S for DOWN Player 2 = O for UP & L for DOWN (example: W & L is pressed at the same time) PS: I use GLUT for the visuals of the game.

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• Disqus-like comment server

  - by wxs

  Hi all, I'm looking at setting up a blog, and I think I want to go the static website compiler route, rather than the perhaps more conventional Wordpress route. I'm looking at using blogofile, but could use jekyll as well. These tools recommend using disqus to embed a javascript comment widget on blog posts. I'd go that route, but I'd rather host the comments myself, rather than use a third party. I could certainly write my own dirt-simple comment server, but I was wondering if anyone knew of one that already exists (of the open source variety). Thanks!

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• Effects to make a speeding spaceship look faster

  - by Badescu Alexandru

  I have a spaceship and I've created a "boost" functionality that speeds up my spaceship, what effects should I implement to create the impression of high speed? I was thinking of making everything except my spaceship blurry but I think there would be something missing. Any ideas? Btw. I am working in XNA C# but if you aren't familiar to XNA describing some effects is still useful. The Game is 3d and i've attached some printscreens of the game This is in normal mode ( none boosted ) and here is the boosted mode ( the craft speeds up forward while the camera speeds in its normal speed , the non boosted speed )

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• Software requirements specification, please help!

  - by Nicholas Chow

  For a school project, I had to create a SRS for a "fictional" application. However they did not show us what it exactly entails, and were very vague with explanations. The SRS asked of us has to have at least 5 functional requirements, 5 non functional requirements and 1 constraint. Now I have tried my best to make one however I think there are still a lot of mistakes in it. Could you all please look at it and provide me with some feedback on which parts I can improve or just tell me which parts are plain out wrong and how to make it better? (The project has a maximum of 12 pages so it is a bit long, I will post it below. FR1 Registration of Organizer FR1 describes the registration of an Organizer on CrowdFundum FR1.1 The system shall display a registration form on the website. FR1.2 The system shall require a Name, Username, Document number passport/ID card, Address, Zip code, City, Email address, Telephone number, Bank account, Captcha code on the registration form when a user registers.

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• Do TODO comments make sense?

  - by Ivan Crojach Karacic

  I am working on a fairly big project and got the task to do some translations for it. There were tons of labels that haven't been translated and while I was digging through the code I found this little piece of code //TODO translations This made me think about the sense of these comments to yourself (and others?) because I got the feeling that most developers after they get a certain piece of code done and it does what it's supposed to do they never look at this until they have to maintain it or add new functionality. So that this TODO will be lost for a long time. Does it make sense to write this comments or should they be written on a whiteboard/paper/something else where they remain in the focus of developers?

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• Emailing Interviewer after interview regarding technical solution

  - by Raghav Shankar

  I had an interview yesterday where I was given a programming problem and I was asked to figure the optimal solution for it. I gave a solution that worked in linear time, but used 2 loops (not inner loops). At the end of the interview, the interviewer saw I was interested in solving the problem, so he said the optimal solution uses only one loop and has linear complexity and at the end of the interview I had asked for his card and he gave one to me. I think I might have figured out a solution and I was wondering if it's alright to email the recruiter thanking him for his time and also mentioning about the solution I had figured out?

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• Java - learning / migrating fast

  - by Yippie-Kai-Yay

  Hello! This is not one of those questions like "How do I learn Java extremely fast, I know nothing about programming, but I heard Java is cool, yo". I have an interview for a Java Software Developer in a couple of weeks and the thing is that I think that I know C++ really good and I am somewhat good at C# (like, here I can probably answer on a lot of questions related to these languages), but I have almost zero experience with Java. I have a lot of projects written in both languages, I participiated in several open-source projects (mostly C++, though). Now, what should I do (in your opinion) to prepare myself for this Java interview. I guess migrating from C# to Java should be kind of fast, especially when you know a lot about programming in global, patterns, modern techniques and have a lot of practical experience behind you. But still two weeks is obviously not enough to get Java in-depth - so what should I focus on to have the best chances to pass the interview? Thank you.

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• Visio Stencils for ADF Faces Available on SampleCode

  - by juan.ruiz

  We are pleased to announce the launch of a new tool aiming to help visual designers and UI developers to build mockups for ADF applications outside of JDeveloper in a fast and quickly way. Available through samplecode.oracle.com, the ADF Visio stencils provide you with a large set of shapes, icons and layouts representing the most commonly used visual components. You can check out this video that shows you how to get you started using the Visio stencils. Let us know what do you think about the stencils on the JDeveloper Forum, your feedback is always important to us.

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• Should I demand unit-testing from programmers?

  - by Morten

  I work at a place, where we buy a lot of IT-projects. We are currently producing a standard for systems-requirements for the requisition of future projects. In that process, We are discussing whether or not we can demand automated unit testing from our suppliers. I firmly believe, that proper automated unit-testing is the only way to document the quality and stability of the code. Everyone else seems to think that unit-testing is an optional method that concerns the supplier alone. Thus, we will make no demands of automated unit-testing, continous testing, coverage-reports, inspections of unit-tests or any of the kind. I find this policy extremely frustrating. Am I totally out of line here? Please provide me with arguments for any of the oppinions.

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• Looking software for making an animated cartoon to present a new application/scenario idea

  - by Skarab

  I have an idea for an application (+usage scenario) and I would like to create an animated cartoon that shows a use case for this application and its novelty. My company is a rather big so I am looking for an interesting way to get people know my idea to get feedback/get a green light to further develop it. Therefore I am looking for an application (free or commercial) that I could use to realize such an animated cartoon. I have posted this quesion before on stackoverflow, but I think this might be a better community to ask such a question.

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• Making organic 2D tilemaps for tile based games...

  - by Codejoy

  So I have always wondered how one makes a nice (not so squarish) 2d tile map, is it possible? all games now days I think use textured polygons...but my game engine (and engine) doesn't support that to my knowledge. But it does support nice TMX files generated by mapeditor.org's Tiled Map Editor. Though in my game I want nice twisting and turning caverns to traverse ... I was wondering some ideas on such a process... is it in the art style? The type of tile engine? both? So what are some common techniques?

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• Adding new events to be handled by script part without recompilation of c++ source code

  - by paul424

  As in title I want to write an Event system with handling methods written in external script language, that is Angelscript. The AS methods would have acess to game's world modifing API ( which has to be regsitered for Angelscript Machine as the game starts) . I have come to this problem : if we use the Angelsript for rapid prototyping of the game's world behavior , we would like to be able to define new Event Types, without recompiling the main binary. Is that ever possible , don't stick to Angelscript, I think about any possible scripting language. The main thought is this : If there's some really new Event possible to be constructed , we must monitor some information coming from the binary, for example some variable value changing and the Events are just triggered on some conditions on those changes , wer might be monitoring the Creatures HP, by having a function call on each change, there we could define new Events such as Creature hurt, creature killed, creature healed , creature killed and tormented to pieces ( like geting HP very much below 0 ) . Are there any other ideas of constructing new Events at the scripting side ?

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• Creating Google sitemap.xml , is it okay for the images to be wrapped in url tags?

  - by AzizAG

  I'm using a tool to generate the sitemap.xml file for me, it started to crawl my website, got the pages and all images, but when exporting it, I review the xml(to make sure nothing is wrong) and I noticed that the images in my website are wrapped in url tags(I think it should be in image tags). See this: <url><loc>http://mywebsite.com/images/12.jpg</loc><lastmod>2012-05-23T13:39:02+00:00</lastmod><changefreq>weekly</changefreq><priority>0.50</priority></url> Shouldn't it be wrapped in image tag?(just like videos wrapped in video tag) Thanks.

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• Tips/Process for web-development using Django in a small team

  - by Mridang Agarwalla

  We're developing a web app uing Django and we're a small team of 3-4 programmers — some doing the UI stuff and some doing the Backend stuff. I'd love some tips and suggestions from the people here. This is out current setup: We're using Git as as our SCM tool and following this branching model. We're following the PEP8 for your style guide. Agile is our software development methodology and we're using Jira for that. We're using the Confluence plugin for Jira for documentation and I'm going to be writing a script that also dumps the PyDocs into Confluence. We're using virtualenv for sandboxing We're using zc.buildout for building This is whatever I can think of off the top of my head. Any other suggestions/tips would be welcome. I feel that we have a pretty good set up but I'm also confident that we could do more. Thanks.

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• CSS naming guildlines with elements with multiple classes

  - by ryanzec

  Its seems like there are 2 ways someone can handle naming classes for elements that are designed to have multiple classes. One way would be: <span class="btn btn-success"></span> This is something that twitter bootstrap uses. Another possibility I would think would be: <span class="btn success"></span> It seems like the zurb foundation uses this method. Now the benefits of the first that I can see is that there less chance of outside css interfering with styling as the class name btn-success would not be as common as the class name success. The benefit of the second as I can see is that there is less typing and potential better style reuse. Are there any other benefits/disadvantages of either option and is one of them more popular than the other?

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• New to Ubuntu - 12.04.1 Kernel Panic on Installation

  - by user88432

  I'm a complete Ubuntu and even Linux newbie. I'm learning here, so I'm grateful for any info to help me learn more about this. I have a Dell Dimension 2400 with a Pentium 4 and 1GB of RAM. It's older but it's only going to be doing some small stuff for me when I get it up and going. I've tried installing several versions of Linux (but I really, really want Ubuntu) and I keep getting a similar kernel panic message. The problem is I don't have a clue what that means or how to begin fixing it. I would appreciate any help to get my machine up and going. I have already tried Installing alternate Ubuntu versions Burning multiple 12.04.1 disks Installing other versions of Linux I have a picture of the screen to share; however, I can't post due to the fact that I don't have enough reputation points on this forum because I'm a newbie. I would be happy to email you a pic, if you think you can help.

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• Nodes can't connect to server after bootstrap

  - by user84471

  I installed maas and I was able to add nodes and they became in ready state. I executed: juju bootstrap And then one of my nodes is waking up and I receive this message on server (after juju status): And this message is shown on node after it wakes up: I am doing this several times and each time I receive the same result. I think something is wrong with my network. It look like this: internet <-> router <-> switch <-> nodes | |<----->server Router is used as a DHCP Server. It's ip is 192.168.0.1 - it's my default gateway. When I was installing maas server I installed dnsmasq and I have used as a range 192.168.0.5-192.158.0.200 and for gateway I used 192.168.0.1 and for domain I used nothing. I was able to add nodes without problems. What maybe the problem not letting nodes to connect to maas server?

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• UML Class Diagram: Abstract or Interface?

  - by J Smith

  I am modeling a class diagram and have spotted an opportunity to simplify it slightly. What I want to know is, would this it be better to implement an abstract class or an interface? The scenario is this, I have the classes: Artist Genre Album Song All of which share the methods getName, setName, and getCount (playcount that is). Would it be best to create an abstract 'Music' class with the aforementioned abstract methods, or should I create an interface, since the classes that implement the interface have to include all of the interface's methods (I think, correct me if I'm wrong). I hope I've given enough detail, please ask questions if I haven't. Thanks!

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• Is software innovation still primarily North American and European? Why, and for how much longer?

  - by limist

  Since this site is read by a global audience of programmers, I want to know if people generally agree that the vast majority of software innovation - languages, OS, tools, methodologies, books, etc. - still originates from the USA, Canada, and the EU. I can think of a few exceptions, e.g. Nginx webserver from Russia and the Ruby language from Japan, but overwhelmingly, the software I use and encounter daily is from North America and the EU. Why? Is history and historical momentum (computing having started in USA and Europe) still driving the industry? And/or, is some nebulous (or real) cultural difference discouraging software innovation abroad? Or are those of us in the West simply ignorant of real software innovation going on in Asia, South America, Eastern Europe, etc.? When, if ever, might the centers of innovation move out of the West? Your experiences and opinions welcome, thanks!

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• How are realistic 3D faces created and animated in video games?

  - by Anton

  I'm interested in being able to create realistic faces and facial expressions for the 3D characters of a game I'm working on. Think something similar to the dialog scenes in games like Mass Effect. Unfortunately I'm not sure where to begin. I'm sure the faces/animations are created through 3D Modeling software, but otherwise I am lost. Do facial animations use the same "bones" that normal body animation uses? Is there any preferred 3D software for realistic faces and animations? Is there a preferred format to export these faces and animations in?

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• acer 1551 suspend/hibernate bug?

  - by user11050

  I put 64-bit Ubuntu 10.10 on my Acer 1551. It does not want to wake from suspend or hibernate. I have tried several different solutions to the apparent problem, but none have worked for me. Similar problem: Acer Aspire 1551 Will Not Wake After Suspend I tried what it suggested, no go. Also, I think it is taking my acer a while to boot-up what can I look into that may be causing it? I am new to ubuntu, and would like some help! thanks

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• Free eBooks from Microsoft&ndash;We like free!

  - by Jim Duffy

  In a recent blog post I mentioned the availability of the Programming Windows Phone 7 ebook by Charles Petzold. Well I have good news, there are a number of additional FREE ebooks available from Microsoft to help you continue honing your tech skills. Moving to Microsoft Visual Studio 2010 Introducing Microsoft SQL Server 2008 R2 Own Your Future: Update Your Skills with Resources and Career Ideas from Microsoft Understanding Microsoft Virtualization Solutions (Second Edition) First Look Microsoft Office 2010 Windows 7 troubleshooting tips Introducing Windows Server 2008 R2 Deploying Windows 7, Essential Guidance I, for one, appreciate Microsoft making these resources available for free. I think it demonstrates their interest making sure we as developers and I.T. professionals have the resources we need to effectively solve the business problems we encounter. Have a day.

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• AndEngine doesn't fill correctly an image on my device

  - by Guille

  I'm learning about AndEngine a little bit, I'm trying to follow a tutorial but I don't get to fill the background image correctly, so, it's just appear in one side of my screen. My device is a Galaxy Nexus (1270x768 I think...). The image is 800x480. The code is: public EngineOptions onCreateEngineOptions() { camera = new Camera(0, 0, 800, 480); EngineOptions engineOptions = new EngineOptions(true, ScreenOrientation.LANDSCAPE_FIXED, new FillResolutionPolicy(), this.camera); engineOptions.getAudioOptions().setNeedsMusic(true).setNeedsSound(true); engineOptions.getRenderOptions().setMultiSampling(true);//.getConfigChooserOptions().setRequestedMultiSampling(true); engineOptions.setWakeLockOptions(WakeLockOptions.SCREEN_ON); return engineOptions; } I have been trying with several values in the camera, but it doesn't fill in all the screen, why?

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• Which is more valuable in product development: an action-oriented or visionary bent?

  - by Marc

  As a software development professional in a fairly conservative large-firm, I always had a much more action-oriented bent, as my job was fairly stable and all that mattered was doing as I was told and completing tasks that were germane to the career of a benevolent dictator (i.e., my boss' boss). Now that I'm no longer working for "the Man", I find it just as important to use the left side of my brain and wrap my head around this whole "vision thing". Which do you think is more important for software product development in a small, yet feisty start-up: Knowing the path or walking (or running) it?

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