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• SQL Why is prefixing column names considered bad practice?

  - by P.Brian.Mackey

  According to a popular SO post is it considered a bad practice to prefix table names. At my company every column is prefixed by a table name. This is difficult for me to read. I'm not sure the reason, but this naming is actually the company standard. I can't stand the naming convention, but I have no documentation to back up my reasoning. All I know is that reading AdventureWorks is much simpler. In this our company DB you will see a table, Person and it might have column name: Person_First_Name or maybe even Person_Person_First_Name (don't ask me why you see person 2x) Why is it considered a bad practice to pre-fix column names? Are underscores considered evil in SQL as well? Note: I own Pro SQL Server 2008 - Relation Database design and implementation. References to that book are welcome.

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• Where does Rails get it's datetime for creating records?

  - by gwapEs9

  I have a rails app with a data model called 'jobs' and i'm faced with a critical design choice crossroads. I don't know enough about Rails and it's inner workings to be able to say for sure what I should do despite a complete read of the rails and ruby docs. I want to be able to accurately display the age of a job record in days. So when a customer logs in, they can see that the job they submitted is 'x' days old. Where does a rails app on Heroku get it's time stamps? From Heroku? or the customers system clock? If a customer has a out of date system clock and submits a job, it could really mess up the sorting of their job list, not to mention me the overseer of job records. Any advice out there? EDIT: Just to be clear, i'm not asking how to list jobs by their date, but to which clock does a rails app on Heroku base it's records.

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• Games with user-supplied artifical intelligence (AI) engines?

  - by RoboShop

  I remember Microsoft used to have this AI game for the .NET framework which allowed you to program a species and this species could be introduced to an "ecosystem" full of species that other people had programmed and they could interact with each other, etc. I can't remember what it was called, but I remembered thinking it was a pretty good idea. Are there any other similiar sites like that, which allows you to design some sort of AI engine and pit it against other programmer's creations? It could be an ecosystem type thing, or it could be a card or board game.

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• Change the scale-policy of OpenGL ES in Android?

  - by wanting252

  I currently develop a game for Android in OpenGL ES 1.0, use libgdx library. I target the 720x480 screen size. For example, I design only one arts pack for 720x480. And what will happen in Android phones with screen-size smaller or bigger than it, 480x320 for instance? Could you please tell me how to change the scale-policy of OpenGL ES in Android? Or in libgdx specially? Is there anything like "Resample Image" like photoshop?(Nearest Neighbor, Bilinear, Bicubic etc..) for libgdx? Edit: I found some tutorials about texture filter in OpenGL, test it with Linear and Nearest. Linear is good for scaling but slow down the game, and Nearest is on the contrary. What should I do to get a balance between those?

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• Archiving your contact form data.

  I get TONS of email from customer. Over time, this email helps me to determine what areas in our product collection are opportunities for enhancement or improvement. I store the email that comes from my blog contact form in folders and then search through them looking for trends periodically. It occurred to me that, while I need to get the emails because many of them are actionable, it would be great if I could use reporting and analysis tools against the collection. So I whipped together...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 redirect a international domain to a subfolder on the English site without hurting Google rankings?

  - by ernest1a

  I have two sites: www.example.de www.main.com www.main.com is English version of www.example.de which is in German. I want to keep only www.main.com. For the English version I will keep www.main.com, but for German I want to move it to www.main.com/de. I am wondering what would be best solution for old www.example.de: Redirect everything from www.example.de to www.main.com/de using 301 redirect? Redirect everything from www.example.de towww.main.com/de/page-url-of-old-size.html? So each link actually get own address. Is that necessary or will Google realize where the page belongs on new site even if I redirect everything to home page? Any other solution, maybe just set in Google webmaster tools the new domain or anything like that?

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• VS2010: “The project type is not supported by this installation.”

  - by PearlFactory

  Was working @ home and then arrived nice and early on Monday armed with all this good stuff I did on the weekend. Login,Headphones On, Check Mail and make cup of tea. Goto load up Solution I was working on the weekend@ home What the !!!... If you edit the unloaded Project you will find something like this   For some Murphys rule reason even after hitting VS2010 with SP 1 my work box has lost MVC3 so thats why {E53F8FEA-EAE0-44A6-8774-FFD645390401} is unknown  This site has a list of the VS system guids i.e C#/VB.NET,Workflow etc www.mztools.com/articles/2008/mz2008017.aspx Goto MVC 3 site www.asp.net/mvc/mvc3 and get latest ver and you should be back on track   Note to self going a bit crazy on the Visual Studio Gallery http://visualstudiogallery.msdn.microsoft.com/ and installing maybe one to many tools might have something to do with my problems...lol

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• JavaOne India Technical Sessions

  - by Tori Wieldt

  If you’re working with Java technology, it pays to go straight to the source for your information. At JavaOne and Oracle Develop India, you’ll be able to choose from more than 90 sessions, hands-on labs, keynotes, and demos delivered by today’s most knowledgeable Java experts. You'll also hear the most up-to-date information on current releases and future directions of Java standards and technologies, and see the latest Java developer tools and solutions. Register now! Technical sessions include: Project Lambda: To Multicore and Beyond Introduction to JavaFX 2.0 GlassFish REST Administration Back End: An Insider Look at a Real REST Application Java-Powered Home Gateway: Basis of the Next-Generation Smart Home Mobile Java Evolution Cloud-Enabled Java Persistence Visit the JavaOne India web pages for a complete list of conference sessions. See you there!

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• VMWare Unity Mode with Ubunty 12.10

  - by Nick

  This is a very difficult thing to search for, and find an answer to because of the unfortunate choice VMWare and Ubuntu both having something called "Unity". My host operating system is Windows 7 - 64 bit, running VMWare Workstation 9.0.1. I have a virtual machine running Ubuntu 12.10 - 64 bit. When I attempt to put VMWare in "Unity mode", I get the following message: The virtual machine cannot enter Unity mode because: - Unity is not supported on the guest operating system. From the VMWare site, there is nothing listed that says that Ubuntu is not supported for this... and I have installed the latest vmware-tools on the guest operating system. It seems like a lot of people have had this issue, but I haven't seen a good resolution to it yet. Does anyone know how to get Unity mode working with Ubuntu?

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• Will learning wxpython worth it in future? [on hold]

  - by user108437

  As we know that microsoft has been pushing Windows 8.1 which strongly uses XAML to design the app and for windows desktop mode WPF is another framework (which probably some thinks it fails) However, in old times, developer write windows form software using MFC or something alike that they have to do their own main loop, etc, etc, and I recently loves python and learning python certainly worth it, since there are still ironpython out there that uses .NET, but I am not sure whether my move to also learn wxpython for building windows software that does not requires .NET worth it also i notice wxpython is somehow old and still uses python 2.7, while today, python already version 3.3, beside that the books are old book published in 2007, and there seems no much hype on building windows form without .NET anymore because .NET is mostly preinstalled in new windows version. So my humble question is, whether should I learn python + wxpython or only python? Is there any benefit that I might not notice for capable in writing windows application that does not use .NET?

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• How much time do you spend actually developing vs. infrastructure activites?

  - by Can't Tell

  When I'm working I feel like most of the time I'm not doing actual work. For example after making a change to the code in order to test it, I have to first build the project, and start the server(say JBoss). Upon testing, I find that there is another small issue. So I bring down the server, make the changes, build again and start up the server again.The building and bringing the server up/down is not very useful work. Also, the IDE (lets say Eclipse) does things such as updating Maven indexes and building the workspace which take some more time to get things done. Have you come across this kind of situation? Do you have tips on how to overcome/bypass this? Any features on the IDE/build tools that can be helpful? Any architecture/application design/technology that attempts to overcome this?

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• Criteria for a language to be considered "object oriented"

  - by nist

  I had a discussion about OO programming today and by browsing the internet I found a lot of different specifications for object oriented languages. What are the requirements for a language to be object oriented? For myself an object oriented language must have classes, inheritance and encapsulation. Is C an object oriented language just because you can use structs and program with an object oriented design? Why/ why not? Are there any good sites/articles about this? And please, no Wikipedia links because I've already been there.

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• Silverlight 4 Theme refresh including RIA Services templates

  The feedback from the Silverlight 4 application themes released and the latest in process have been overwhelmingly toward the positive. We appreciate the feedback and hopefully you appreciate the transparency in the process. As a developer I want my fellow brethren to appreciate good design and use it whenever possible even as a default if you dont have designers on board. In the initial release we had some issues getting the RIA Services ones out at the same time but weve got those finished now...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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• Remote Desktop advice

  - by spoon16

  Coming from Windows, so that is what my expectations are based on. I have a Ubuntu desktop edition instance running as a virtual machine on a server. I would like to use it as my primary open source dev environment but the VNC tools I have used don't seem to be as rich as "Remote Desktop Connection" in Windows. The two things that are missing for me: connecting/logging into a non-console user sessions dynamically resizing the graphical resolution based on the size of the remote desktop window device sharing (USB devices plugged into client shared with remote) Is there an appropriate client that I can run on Windows to connect to my ubuntu dev instance that provides these capabilities?

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• Technical Article: Experimenting with Java Timers

  - by Tori Wieldt

  OTN's new tech article is "Experimenting with Java Timers" by T. Lamine Ba. This article studies time—how Java handles timers and the scheduling of tasks. Java timers are utilities that let you execute threads or tasks at a predetermined future time, and these tasks can be repeated according to a set frequency. The article starts with a simple "Hello World" program in a web application that's composed of JavaServer Pages (JSP) and uses the model-control-view (MVC) design pattern. The IDE used in this article is NetBeans IDE 7.1, but you can use any IDE that supports Java. "Experimenting with Java Timers" demonstrates how to get started scheduling jobs with Java. To learn about Swing timers, check out the Java tutorial "How to Use Swing Timers" and additional information in the Java Platform, Standard Edition 7 API Specification for Class Timer. 

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• "Google files": Building a web interface to find/ack/grep

  - by user27915816

  I am working on a project where we would like to have build a web interface that gives the user the ability to "Google" files in a directory in a remote machine. For example, the user would type a string in a box, and then the system would find all files that contain that string and present them in the browser. The system would then give the user the ability click on any of the files to open them/display them in the browser. We want to avoid reinventing the wheel if possible, but don't really know where to start (none of us in the team have much experience building websites). What software packages, libraries or tools exist that can help us get this done?

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• Using git (or any version control) regarding migration from one language to another [on hold]

  - by Max Benin

  I'm polishing an old project that i released some years ago, and the main purpose on that, is to arrange some folder structures and port the entire code from actionscript to haxe. All the game features, assets and design will remain the same. I have some doubts regarding versioning the project in this circumstance. Assuming that the only thing that will be drastically changed is the code migration, is it correct maintaining the new project changes on the same repository ? I was thinking in tagging it something like V1.1 or Branch the entire project. But i'm afraid that i'm gonna deviate from the versioning patterns. How can i use this version control issue in the best practice way ? Thanks.

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• What steps should be taken to ensure that an open source database gets ready for production?

  - by I_like_traffic_lights

  I am considering using GridSQL in a production environment. However, I do have some indications that it is not ready. One is that it got excluded by the offering of EnterpriseDB a while ago, and the forums seem to report a few wrong results and relatively severe bugs. The alternatives to GridSQL, however cost around 100.000$ to buy, so I was thinking to utilize some of this money to ensure that GridSQL gets ready for production. At the same time, I could risk spending 50.000$ and months of work on the development of GridSQL, just to discover that the design was flawed and that a complete rewrite is needed. Then I would have to buy the commercial alternatives to GridSQL and the existence of my startup would be at risk. Question What steps would you take to ensure that there is as little risk as possible that the worst case scenario described above would happen? It is unrealistic that I could do much testing nor code review/coding myself (I am also not the best developer), so please describe where to find the guys that would need to do the work.

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• Particle system lifetimes in OpenGL ES 2

  - by user16547

  I don't know how to work with my particle's lifetimes. My design is simple: each particle has a position, a speed and a lifetime. At each frame, each particle should update its position like this: position.y = position.y + INCREMENT * speed.y However, I'm having difficulties in choosing my INCREMENT. If I set it to some sort of FRAME_COUNT, it looks fine until FRAME_COUNT has to be set back to 0. The effect will be that all particles start over at the same time, which I don't want to happen. I want my particles sort of live "independent" of each other. That's the reason I need a lifetime, but I don't know how to make use of it. I added a lifetime for each particle in the particle buffer, but I also need an individual increment that's updated on each frame, so that when PARTICLE_INCREMENT = PARTICLE_LIFETIME, each increment goes back to 0. How can I achieve something like that?

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• How to teach your users/customers to send better error descriptions

  - by ckeller

  I often have to deal with customers or users which are reporting errors in applications. Most of the time their content is something useless as ERROR!!! x does not work without much more information. For resolving the issue I have to request every single detail of them, which often is more time consuming than fixing the issue itself. Other send information in formats which are not ideal, like screenshots (of data records, not of errors) although they could send a link (we have access to the systems) and so on. How do you tell your users/customers to describe the problems with more details so that the whole process could be easier for both sides? edit This question is more about the social skills, than how to achieve programmatic collection of logs and error information. I'm aware of the fact that this should be part of good software design.

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• Google sort GWT 2.2 et met à jour son plug-in pour Eclipse : support de l'HTML5 et meilleure intégration avec Google App Engine

  Google sort GWT 2.2 et met à jour son plug-in pour Eclipse Support de l'HTML5 et meilleure intégration avec Google App Engine au menu Google vient de lancer la version 2.2 de Google Web Tools (GWT) et une nouvelle version de son Google Plugin pour Eclipse. GWT 2.2 intègre de nombreuses nouveautés liées notamment au HTML5, comme l'intégration de l'élément Canvas pour le rendu graphique 2D, et des balises audio et vidéo. On remarquera des API qui sont pour Chris Ramsdale de l'équipe de GWT, « encore expérimentales, qui peuvent changer légèrement sur les deux prochaines versions », mais qu'il estime assez stables pour mériter le détour. Autre nouveauté n...

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• Enterprise 2.0 - How to

  - by me

  Today I had a very interesting lecture at the  Fachhochschule Nordostschweiz "Hochschule für Wirtschaft" around How to design & implement an Enterprise 2. 0 solution. We had a great (and sometime pretty skeptical)  discussion around Social Value Models. The presentation can be found below. Enterprise 2.0 - How to View more presentations from Peter Reiser Feedback are always welcome.

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• Java EE/GlassFish@Java2Days

  - by reza_rahman

  Java2Days 2012 was held in Sofia, Bulgaria on October 25-26. This was the third installment of the premier Java conference for the Balkan region, having three separate tracks for Java, the Cloud and Mobile. It attracted over a thousand enthusiastic, bright young developers and a number of world class speakers. There were no less than three full-house sessions on Java EE/GlassFish - one on Java EE 7, one on Domain-Driven Design using Java EE 6 and one on JSR 356/WebSocket. More details on Java EE/GlassFish@Java2Days, including slides and code examples, posted here.

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• quickest way to research a set of pages backlinks

  - by JeremyB

  I have a list of 300+ pages (they were chosen based on which pages rank for a keyword I'm interested in) and I want to compile a list all the (known) inbound links to those pages. What's the fastest way to do this? It seems like the only tools out there-- Yahoo Site Explorer, SEOMoz, Majestic, require you to either a) manually export each set of links by hand, or b) get data at the domain level (e.g. Majestic's clique hunter). Does anyone know of any efficient way to do this? I ask because I'm about to write a bunch of code and I don't want to waste my time if there's another tool that will work. I know SEOMoz and Majestic have API's but I'm wondering if there's a more user-friendly option.

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• Duplicate page content and the Google index

  - by Kit Sunde

  I have a static pages with dynamically expanding content that google is indexing. I also have deep links into virtually duplicate pages which will pre-expand the relevant section of content into the relevant section. It seems like Google is ignoring all my specialized pages and not putting them in the index. Even after going through web-masters tools, crawling and submitting them to the index manually. I also use the google API for integrating search on the site, and the deep linked pages won't show up. Is there a good solution for this?

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