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• Interest in Hadoop [on hold]

  - by pradeep

  I am a tech guy with around 7 yrs in IT and i basically work on LAMP technology. From past few months i have gained interest in hadoop. But i am confused on few points Is it worth investing time and money for learning hadoop? Is hadoop gonna stay for long or even big data concept gonna stay for long? Does learning and working hadoop take care of my compensation part? I have no idea about java. Is java a mandate for Hadoop. I have read answers where they say both.

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• General usage question of vbo

  - by CSharpie

  Firstofall, I am sorry if my question is to broad. I am developing a tile based game and switched from those gl.Begin calls to using VBOs. This is kind of working allready, I managed to render a hexagonal polygon with a simple shader applied. What I am not sure is, how to implement the "whole" tile concept. Concrete the questions are: - Is it better to create 1 VBO for a single tile and render it n-Times in every different position, or render one huge VBO that represents the whole "world" - Depending on the answer above, what is the best way to draw a "linegrid". Overlay with the same vbo using the respecting polygon.mode , or is there a way to let the shader to this? - How would frustum-culling or mousepicking work then, do i need to keep the VBO-data in memory?

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• How to achieve 'Activities' in Unity?

  - by Ralf Hersel

  I like the concept of an activities centric desktop and I wonder if this can be achieved in Unity. For me, an activity is a couple of applications that belong to the same subject, like 'photo manipulation', 'software development', 'office work', 'social activities', 'music and video'. I would like to utilize the virtual desktops to arrange applications that belong to the same activity group. Example: Desktop 1 contains all applications that belong to 'office work' Desktop 2 contains all applications that I need for 'software development' Desktop 3 contains all applications that I usually need for 'photo works' Therefore I would like to give names to the virtual desktops that reflect their purpose. And I would like Unity to auto-start the required applications when I start my computer or when I switch to one of the virtual desktops. Is this possible with Unity (or any other desktop)?

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• Really, Mobile Devices will Take Over the World?

  - by p.gielens

  My blog has been quiet for quite a while. My inspiration comes from crunching/exchanging information which I should do more often. Gartner analysis tells us that by 2013 mobile phones will overtake PC’s as the most common Web access device worldwide. A few years back I would have said non sense, but apparently most Web users are comfortable with less processing power. Just take a look at the increasing business in Netbooks. Wouldn’t it be great to have a mobile phone which can connect wirelessly to my home TV, monitor, car display, mouse, keyboard, etc? And to have the processing power of the current Netbook generation? Where can I buy it? Why are we making our PC devices (for instance the slate) smaller while we can make our mobile device’s functionality bigger? What about the single responsibility principle? Does it apply to physical devices as well as good object-oriented software?

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• Structuring an input file

  - by Ricardo

  I am in the process of structuring a small program to perform some hydraulic analysis of pipe flow. As I am envisioning this, the program will read an input file, store the input parameters in a suitable way, operate on them and finally output results. I am struggling with how to structure the input file in a sane way; that is, in a way that a human can write it easily and a machine can parse it easily. A sample input file made available to me for a similar program is just a stream of comma-separated numbers that don't make much sense on their own, so that's the scenario I am trying to avoid. Though I am giving the details of my particular problem, I am more interested in general input-file structuring strategies. Is a stream of comma-separated values my best bet? Would I be better off using some sort of key:value structure? I don't know much about this, so any help will probably put me in a better track than I am now.

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• Would it be practical/secure to import my GPG keys into (Open)SSH?

  - by InkBlend

  I know a bit about computer security, and well as about the concept of public and private keys. I also know that both GPG and (Open)SSH use the public/private key system. My question is, is there any reason that I would not want to use my GPG keys as authentication for SSH? Please note that, while a have a little bit more experience with Linux, GPG, and SSH than the average computer user, I am by no means an expert. Please be patient and point out any mistakes that you might see.

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• How to interpret Google's "Avg. Page Load Time"?

  - by hawbsl

  Is there any industry rule of thumb for what's considered an unacceptable load time v. an OK one v. a blistering fast one? We're just reviewing some Google Analytics data and getting 0.74 Avg. Page Load Time reported. I guess that's OK. However it would be good if some meatier comparison data were available, or a blog post, or somewhere where there's some analysis of what speeds are generally being achieved by various kinds of sites. Any useful links to help someone interpret these speeds? If you Google it you just get a lot of results dealing with how to improve your speed. We're not at that stage yet.

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• Are there any actual examples of profitable programmer's "worker's cooperatives"?

  - by Wannabe Tycoon

  http://en.wikipedia.org/wiki/Worker_cooperative I'm curious whether there are, anywhere in the world, worker's cooperatives that center on a technology business that involves either programming, IT, or some sort of IT or programming related consulting or services. The wikipedia link above is an overview of the concept. The short form explanation is that a co-op is a worker-owned business. Also there is the notion that every worker owns shares in the business. I am interested in knowing whether an example of a "programmer's/IT co-op" even exists. Note: I am not talking about nor asking about a government-funded incubator nor any other socialized, state supported group. I also don't mean "co-working", which is renting an office with other self employed people doing their own thing. I mean a going, profitable IT business operating in a competitive environment that is worker-owned and run.

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• Comment l'analyse statique moderne peut-elle faciliter la vie des développeurs ? Découvrez la solution de Coverity, utilisée par le CERN

  Webinar : comment l'analyse statique de dernière génération peut-elle faciliter la vie des développeurs ? Découvrez la solution de Coverity, utilisée par le CERN Dans un monde où un bug mineur peut avoir des effets dévastateurs, les outils d'analyse statique d'ancienne génération s'avèrent souvent incapables de détecter les vrais défauts de code, difficiles à identifier. Mais des outils modernes d'analyse statique de code existent, permettent de détecter ces défauts critiques et potentiellement dommageables tôt dans le cycle de développement, permettant ainsi de réduire les coûts, les délais et les risques liés aux erreurs logicielles. Coverity Static Analysis est l'une de...

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• How to make a jar file run on startup & and when you log out?

  - by RanZilber

  I have no idea where to start looking. I've been reading about daemons and didn't understand the concept. More details : I've been writing a crawler which never stops and crawlers over RSS in the internet. The crawler has been written in java - therefore its a jar right now. I'm an administrator on a machine that has Ubuntu 11.04 . There is some chances for the machine to crash , so I'd like the crawler to run every time you startup the machine. Furthermore, I'd like it to keep running even when i logged out. I'm not sure this is possible, but most of the time I'm logged out, and I still want to it crawl. Any ideas? Can someone point me in the right direction? Just looking for the simplest solution.

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• Content Weighting and Sociology

  - by Chris Massey

  I’ve had loads of fantastic feedback on the concept and early curation wireframes I posted on the labs, and it’s led to some further thoughts on the topic of voting. More specifically, thoughts about the kinds of behaviour and values a platform encourages in it’s users via the set of available actions. StackOverflow is a very good example of this kind of sociology in action, not only via the set of available actions, but through the reputation system it uses to both reward and control it’s users. In our case (specifically, in the case of the curation model I’ve been talking about thus far), the main considerations are how the quality of content is judged, and how to make sure each piece of curated content gets a fair hearing. Based on the feedback and conversations I’ve had with many of you over the last few days, a few considerations came to light about how we might need to weight and display our curations, and I’ve written about that more extensively over on the labs themselves – have a read and let me know what you think.

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• Is it a bad practice to have an interface to define constants?

  - by FabianB

  I am writing a set of junit test classes in java. There are several constants, for example strings that I will need in different test classes. I am thinking about an interface that defines them and every test class would implement it. The benefits I see there are: easy access to constants: "MY_CONSTANT" instead of "ThatClass.MY_CONSTANT" each constant defined only once Is this approach rather a good or bad practice? I feel like abusing the concept of interfaces a little bit. You can answer generally about interfaces/constants, but also about unit tests if there is something special about it.

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• New to Maven-- Creating Java EE Projects

  - by M.C.

  Greetings-- I've been developing Java EE web apps with Eclipse for about a year. My employer doesn't use Maven, but the more I read about it, the more convinced I am that Maven + Hudson will be greatly beneficial for us. First, though, I have to become comfortable with those technologies in my spare time, so that I can create a proof-of-concept. Right now, I'm still a Maven newbie. Is there a set of best practices for creating Java EE web apps with Maven? For example, I could create a project with a basic archetype and then add all of the necessary JARs by putting dependencies in the POM for the servlet container, EJB, EclipseLink, etc... That might work, but it might not be the best way to do it. I'd greatly appreciate any guidance that you could provide on this topic. Thank you very much!

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• Interface hierarchy design for separate domains

  - by jerzi

  There are businesses and people. People could be liked and businesses could be commented on: class Like class Comment class Person implements iLikeTarget class Business implements iCommentTarget Likes and comments are performed by a user(person) so they are authored: class Like implements iAuthored class Comment implements iAuthored People's like could also be used in their history: class history class Like implements iAuthored, iHistoryTarget Now, a smart developer comes and says each history is attached to a user so history should be authored: interface iHistoryTarget extends iAuthored so it could be removed from class Like: class Person implements iLikeTarget class Business implements iCommentTarget class Like implements iHistoryTarget class Comment implements iAuthored class history interface iHistoryTarget extends iAuthored Here, another smart guy comes with a question: How could I capture the Authored fact in Like and Comment classes? He may knows nothing about history concept in the project. By scalling these kind of functionallities, interfaces may goes to their encapsulated types which cause more type strength, on the other hand explicitness suffered and also code end users will face much pain to process. So here is the question: Should I encapsulate those dependant types to their parent types (interface hierarchies) or not or explicitly repeat each type for every single level of my type system or ...?

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• Green IT : Les entreprises de plus en plus interessées par le "smart bluiding", pour des bureaux plus économes en énergie

  Green IT : Les entreprises sont de plus en plus interessées par le "smart bluiding", des firmes comme Microsoft, Google, IBM ou Cisco pourraient s'affronter sur ce terrain Un nouveau concept fait son apparition et commence a attirer les convoitises dans le domaine de l'écologie numérique : les "smart building". En effet, dans le futur proche, la prochaine grande tendance en Green IT sera d'améliorer la consommation d'énergie des bâtiments où sont installés des bureaux. Une belle concurrence en perspective, entre les fabriquants de systèmes de contrôles des immeubles (mais aussi les vendeurs d'éclairages, etc.) et les entreprises informatiques. Ces prédictions émanent d'un rapport re...

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• Cursor-Killing: Accessing Data in the Next Row

  Cursors are considered by many to be the bane of good T-SQL. What are the best ways to avoid iterative T-SQL and to write queries that look and perform beautifully? This first part in an ongoing series of cursor-killing handles inter-row analysis. 24% of devs don’t use database source control – make sure you aren’t one of themVersion control is standard for application code, but databases haven’t caught up. So what steps can you take to put your SQL databases under version control? Why should you start doing it? Read more to find out…

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• How can I improve these online java programming puzzles I wrote for my (middle/high school) students?

  - by Arcymag

  I'm teaching some middle and high school students programming right now, and I found that some of them really liked online programming puzzles. So I created http://www.kapparate.com/coder/ , and right now there's 4 categories of puzzles. All the puzzles are set up right now so that variables are pre-initialized, and the user plugs in some code in the middle. For example, the problem might say these are pre-initialized: int x = ????; int y = ????; int z; and then the program might ask the student to write the final line of code: z = x + y;. Now I know I could go a long way in improving the usability of this site (like having an area that lists the pre-defined variables), but I was wondering if this concept seems sound. I know some sites have kids fill in functions, but not all of my students know what functions are yet, and I'm trying to introduce online programming puzzles before that.

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• Is a Hackathon a good place to present serious projects?

  - by Sabrina Gelbart

  I'm participating in my first hackathon soon. I have a great idea that has been rolling around in my head for a while, and if it takes off I'd obviously like to have my name on it/make some money on it. Is a hackathon a good place to present a project I'm serious about? How will the ownership work? I think I could get the project functional over the weekend of the event, but I'd definitely want to develop it further after. I'd like to be cited with the concept, but people who work with me on it would obviously be partial owners (or whatever would be considered fair). My main goal is for this project to get off the ground, but I also don't want to be left out if it ends up making money.

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• Le Web bientôt doté d'un nouveau langage ? CAS s'inspire du CSS pour proposer une définition des attributs des balises HTML dans une feuille

  Le Web bientôt doté d'un nouveau langage ? CAS s'inspire du CSS pour proposer une définition des attributs des balises HTML dans une feuille Tab Atkins Jr, un représentant de Google au sein du W3C (World Wide Web Consortium) vient de proposer à l'organisme un nouveau langage de script pour normalisation. Le langage CAS pour Cascading Attribute Sheets s'inspire grandement du CSS (Cascading Style Sheets), à la différence qu'il est basé sur un concept d'attributs HTML. L'idée de base autour de ce nouveau langage est que tout comme avec le CSS, les développeurs pourront définir dans un fichier des attributs pour les balises HTML, qui seront directement appliqués à l'ensemble ...

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• Is there a title for someone who is both a Software Developer and a Business Analyst?

  - by gyin

  I usually see two job titles in the IT industry. My understanding of their most commonly accepted usage (simplified): Business Analyst: Main role is eliciting the users' needs Software Developer Main role is to design, build and test a software solution answering the needs I'm wondering: "How we should call somebody whose role is to do both of the roles above?" Is this a common job title? And is trying to find people with these broadness of skills realistic, difficult? EDIT: I'm specifically interested to name Lead Software Developers who have eventually learned and can apply techniques of Business Analysis.

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• How can I effectively use a netbook and a desktop computer together for programming?

  - by Mana

  Currently, in my workspace, I have a netbook sitting off to the side gathering dust while I write code on my desktop. As a result, the only use my netbook gets coding-wise is when I'm writing up a quick Python script to model a given problem or concept in class; I never use it at home for coding, or for anything at all, as it is all possible and faster on my (much more powerful) desktop. I feel like this is wrong and that I should be making better use of my netbook. What effective uses have you found for a netbook and a desktop together when programming (or for software development in general)? What are the merits of this practice?

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• Does any CMS natively support something like aquaBrowser/Vufind

  - by nus

  What I'm looking for is to set up a CMS website with a tag cloud/search system where when you click a tag it shows as a search filter, and you get a new tag cloud which only shows tags from the articles that have the primary tag. This should let the user easily include or exclude tags from the search. Also i would like to let the user filter on publication date by using a slider... Check this for an example of how aquabrowser does this (just search for something and play with the tag cloud): http://kidscatalog.columbuslibrary.org It's not perfectly what I want and I don't want to use flash, but I like the concept alot. If something like this does not exist and i might have to code it myself, which cms is most recommended (eg easy to extend, already has tag clouds and search filters,...)

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• Fallait-il publier une preuve de faisabilité sur la faille de Windows XP comme l'a fait un ingénieur

  Fallait-il publier une preuve de faisabilité sur la faille de Windows XP Comme l'a fait un ingénieur de Google ? Microsoft ne décolère pas Rien ne va plus entre Microsoft et Google. Tavis Ormandy est expert en sécurité chez Google. Le 5 juin dernier, il avait mis à jour une faille dans le Centre d'Aide et de Support de Windows XP. La faille concernait également Windows Sever 2003. Jusqu'ici tout va (presque) bien. Le problème vient du fait que Tavis Ormandy a ensuite décidé de mettre au point un « proof of concept », une preuve de faisabilité qui montre comment exploiter cette faille. Il n'y a a priori rien de choquant dans cette démarche assez classiq...

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• Where does a scrum master draw the line with blocking issues?

  - by Pete2k

  I understand the concept that a Scrum Master should remove impediments. However I'd like to know where exactly the line should be drawn. For example a team member might have an impediment whereby they need to get support to log onto a live server and get some details. They can't progress a bit of work until this is done. Its a blocking issue essentially. But should it be the Scrum master that goes to the Ops department and does this for the developer or if the developer can do it themselves should they just do it themselves. At what point does an issue become a blocking issue?

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• how to get from 1 byte to 2 bytes

  - by dhblah

  I just got something I can't understand, so we have 1 byte, which is 8 bits, which is 2^8. Now 2 bytes should be 2 * 1 byte, which is 2 * 2^8 = 2^9, but actually 2 bytes is 2^16. What I'm missing here? I mean, it seems like 2 bytes isn't 2 * 1 byte, it's more like 1 byte * 1 byte, but this should give you byte^2, which doesn't make sense. Can Please someone explain me some concept I am getting wrong here? Thanks in advance.

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