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• what is the Best way to learn object oriented principles

  - by Mike

  I am interesed in OOP principles and i found lots of documentations and books about it, for instance in C++, Java, .NET, PHP and so on, but if i only want to learn OOP principle, differences and not in language, what can i do? i want a good documentation, not just like a whole book about something except OOP :) specific answers, how it works, main features, pictures, or videos, or forum, or even stack... in every time I began studying i read a whole history of programming, computer science, software development and bla bla... i need specific answers, if it is possible i really need to learn, i need examples and exercises thanks in advance

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• Theme sometimes fails to load on some UI elements

  - by Neil

  I have no idea if this error as been seen before or not, I have looked around and found people saying they have errors that sound the same but none of the fixes work, my issue is that sometimes the theme does not load some parts of the UI, (the buttons and icons in this case) but the rest is just fine (window bars e.t.c) so I have no idea what the issue is, it works just fine for the most part but sometimes has this bug, if you restart the system it tends to fix it for some time so its hard to see how it could be a graphic card error, however I am very new to linux systems so I may be missing someting very fundamental here. Thank-you in advance. This image shows my problem

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• Why do almost all Java jobs (postings and from recruiters) say J2EE rather than the newer JEE versions?

  - by Rick

  I'm still fairly new to Java but have definite comfort now working within the framework I am used to which would mainly be focused on Spring, Hibernate and JEE 6. It seems like every time I talk to a recruiter all they do is throw around the keyword "J2EE", they need someone with J2EE experience, etc. I am aware that legacy systems would still be using J2EE but it seems like at least some jobs would be advertising JEE now. Just curious if they are just stuck with some keyword that they can't seem to wrap their heads around it having a newer version or what. Having not done Java all that long, I haven't used J2EE specifically but wouldn't it be fairly easy to adapt having used the newer enterprise edition? Just curious to hear anything about this from someone with more experience.

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• How often do CPUs make calculation errors?

  - by veryfoolish

  In Dijkstra's Notes on Structured Programming he talks a lot about the provability of computer programs as abstract entities. As a corollary, he remarks how testing isn't enough. E.g., he points out the fact that it would be impossible to test a multiplication function f(x,y) = x*y for any large values of x and y across the entire ranges of x and y. My question concerns his misc. remarks on "lousy hardware". I know the essay was written in the 1970s when computer hardware was less reliable, but computers still aren't perfect, so they must make calculation mistakes sometimes. Does anybody know how often this happens or if there are any statistics on this?

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• Consulting Expertise

  - by Oracle OpenWorld Blog Team

  Consult with the Experts Onsite at Oracle OpenWorld by Karen Shamban Learn from Oracle Consulting experts how to maximize the value of your Oracle investments by attending one or more Oracle Consulting sessions. Topics include cloud architecture and implementations, Engineered Systems best practices, Oracle Fusion Applications migrations, and more. Or, stop by the Oracle Consulting Center or the Demo Stations in the Exhibition Halls to ask specific questions and get additional information. Are you an IT executive or enterprise architect?  Register for the information-packed Enterprise Architecture Summit on Wednesday, October 12. To see the full range of Oracle Consulting activities at Oracle OpenWorld, click here.

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• Randomization of biomes

  - by user24527

  You know how in Minecraft, the World is ever-expanding and all the biomes are randomized? My generalized question is: In relation to a space simulation that is also ever-expanding as the player moves about the world, how would one go about programming this randomization in Java? My real question is: Could I get a simplified example broken down into these example classes: astroids (This would include how many astroids there are, their positioning in space, their size, how often the larger astroids occur, how close they are to each other, the limitations of how many of the large asteroids can be in one field, how often astroid fields are generated, etc.) star-types (size, color, type, how often they occur, where hey occur, etc.) inhabitable-planets (size, positioning, how often they're generated, where they are generated, etc.) This would be very helpful currently since I wish to make a simplified version of such a program.

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• How large should I make root, home, and swap partitions?

  - by starcorn

  Hello, I have a laptop with win7 installed. I have now made a 60gb partition which I want to install ubuntu into. The question I have, before I do the installation, is how large each of the root, swap, and home partition should be? I have read some place that root could be as small as 8GB, but isn't that too small? Since I guess beside ubuntu all the softwares installed will reside there as well? And I think I'm going to set my swap to be 2GB large. My main concern is how large should the root partition should be. I'm mainly going to use ubuntu for programming and browse the web.

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• Are VM-based languages becoming viable for Graphics since the move to GPU computing?

  - by skiwi

  Perhaps the title is not the most clear, so let me elaborate it more: I am talking about VM-based languages, by that I mean languages that run on the JVM (java) and for example C#. Also I am talking about 3D graphics, just to be clear. Lately the trend has been that most computing is being done on the GPU and not on the CPU, and since times the issue with programming games on a VM-based language is that garbage collecting may happen randomly. So let's take a look which is responsible for what: Showing the graphics: GPU Uploading graphics to the GPU: CPU? Needs to be done every frame? Calculating physics constraints: GPU Doing the real game logic (Determining when to move objects (independent of physics calculations), processing AI): CPU Is my list actually correct? And if it is, is for example Java becoming more viable? Or is uploading the graphics (vertices) still the most expensive operation? Would like to get more insight into this.

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• Most Useful New Technology?

  - by Craig Ferguson

  I'm looking to take a sort of sabbatical, and I'd love to use it to learn a new technology. My question is this: What's the most useful "new" technology for a software engineer to use? Node.js, iOS programming, Android, something else? I'd prefer to stay away from anything too new or experimental, since those are, in my experience, rarely actually used in professional production environments (for better or worse). Does anyone happen to have stats on how many jobs there are for each new technology or have anecdotes about how fun each one is? I've been using python/Django, so that's out, and it's similar to Ruby so i don't think learning Ruby would be that useful to expanding my skills. Anyone have any other ideas?

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• Can I rightfully claim this as my own project if I recieved help online?

  - by Brad Guy

  Basically I'm new to network programming in Python, so I went on a tutorial online to find out about it. Using what was taught in the tutorial (creating a socket, connecting to ports, etc), I modified the code so that I made a program where two computers can send messages to one another. If I were to apply for a job and show this to my interviewers, would the code for it technically be mine? It is fair to say that I didn't modify the code by that much; However, what if for example I modified it into something like a tic-tac-toe game, where two users play each other from different PCs, would the code then be mine? I just don't want to look like a plagiarizer hence why I ask.

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• Most important research article for software development [closed]

  - by Fabian Fagerholm

  Researchers all over the world collectively publish thousands of articles on software development topics every year, hoping to benefit practical software development in the long run. (Of course, some of them only publish to increase their publication count, but hopefully most still aim to advance the field.) But what is really useful for practical software development? Of all the research articles you have read, what do you consider being the most important one for the software development field? What is it about that article that makes it stand out as especially important in your view? Note: I deliberately chose the term "software development", but you can freely interpret it as "programming" or "software engineering", or anything else that fits into the "software development" category.

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• Mouse stopped responding after installing Ubuntu Server

  - by Danijar

  It was 2 operating systems on my machine, Windows 7 and Ubuntu Desktop 12.04, both 64bit version. All works well, firstly I installed Win, then the Desktop version of Ubuntu, lasts's GRUB rewrites windows's boot and of course added it as a variant to load. Yesterday I wish to play with Ubuntu Server 12.04, and install it as a third operating system. During the installation Server's GRUB seems to rewrite that which installed earlier (background color became black, was purple). Firstly, newly installed GRUB generates me overmuch load options for Ubuntu Desktop, by two for each kernel version (normal and recovery modes). OK, it's bearable, but most thing, that the mouse on this machine is totally stops responding, regardless which operating system I choose to load. Hope somebody help me. Thanks in advance!

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• Popularité des langages : Go de Google chute, Objective-C dans le Top 10, d'après l'index de juin de

  Mise à jour du 07/06/10 Popularité des langages : Go chute, Objective-C dans le Top 10 D'après le classement du TIOBE Programming Community Index de juin Au delà de la rivalité entre Java et C, les deux langages qui continuent de se disputer la première place du classement des langages de programmation les plus populaires, l'index mensuel de TIOBE recèle en juin deux enseignements intéressants. Le premier concerne Go, le langage de Google qui avait récemment fait une progression fracassante. Go connait aujourd'hui un recul très significatif puisqu'il recule brutalement et disparaît du Top 20 de l'indice (21ème). En sens...

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• Changing hosts but keep old emails [closed]

  - by LDaniel

  Possible Duplicate: Change host / keep emails OK here's the situation...I'm trying to transfer my domain and email address to a new hosting service and I would like to start using Google's domain apps for my email, etc. My email address is currently on a WebMail type platform and when I move my domain and start using Google domain apps I would also like to keep the old emails and have them imported the the email address on Google. Note: The email address will be the same on both hosts. For example [email protected]. So its keeping the same address between two different systems. I've been Googling how to do this for awhile and all the migrate options that come up don't appear in the the Google inbox setting or domain apps config settings. Any help is greatly appreciated.

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• Correct process for creating builds reliant on 3rd party packages

  - by Patrick

  I work on a Symfony 2 codebase. We use a number of third-party packages (most are in the Symfony Standard Edition). We use composer for dependencies. We current have all of our third-party code committed in our repository (after changing .gitignore files) to ensure stability. According to Proper Programming Practices™, we are not supposed to have any third-party packages in our repo. We are supposed to pull them down and include them at build time. How are we to do proper QA and debugging when at any given time our dependencies could push an update that breaks functionality?

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• iOS NSError with global handler

  - by Sebastian Dressler

  I am in the beginning of programming an iOS app. Having read the Apple guides on how to deal with errors, I got the following most important points: Exceptions are for programmers Use NSError for the user Now, NSError is usually passed as out-argument which can then be used inside and has to be checked by the caller. However, I'm asking myself whether it is a good idea to use a global error handler, say a singleton which wraps around NSError and could be used to trigger errors and error handling from within the called function. Is there anything against that method or would it be a bad practice?

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• Exalytics at Partners in EMEA

  - by Mike.Hallett(at)Oracle-BI&EPM

  Many partners have got Oracle Exalytics systems on their premises where they can help customers with proof-of-solution demonstrations to show how fast this engineered in-memory analytics solution can be, and how this translates into tangible business benefits.  Any customer with Oracle Analytics (OBIEE, Essbase, Hyperion Planning, Oracle BI-Applications) who is seeking to upgrade their hardware infrastructure, looking for a quick, low risk and cost effective implementation, should contact one of these to test what an Exalytics can do for them. Below is a list of some of our specialist Oracle Partners who have an Exalytics: http://www.arrowecs.fr/produits/index.php?id=82 France http://www.ise-informatik.de/ Germany http://www.hotitem.nl/ Netherlands http://bi.fors.ru/ Russia http://www.synchrotech-group.com/ Switzerland http://www.linkplus.com.tr/ Turkey http://www.rittmanmead.com/ UK

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• How can I programmatically block user input for a given time?

  - by black_puppydog

  As a person working in computer science working offline to avoid facebook and thelike is not always (meaning hardly ever) possible for me since I mostly have to be online to work. I have tried leechblock and similar things but the problem becomes that at some point I start making systems for myself to hack, which is kind of pointless if oyu have root. I would very much like to try out the method described here. (Short version: reboot your PC every time finish a task or get bored with it) Unlike for the author of this blog my work is mainly done not in screen sessions but in IDEs ans other not-so-fast-to-start-up stuff, meaning a full reboot including loading all my programs will take its time. So, the question is: How can I block all user input and preferrably blank the screen for a given amount of time? The idea would then be to have a keyboard shortcut to activate the script/program (which would probably also have to have root i guess?)

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• Using packages (gems, eggs, etc.) to create decoupled architectures

  - by Juan Carlos Coto

  The main issue Seeing the good support most modern programming platforms have for package management (think gem, npm, pip, etc), does it make sense to design an application or system be composed of internally developed packages, so as to promote and create a loosely coupled architecture? Example An example of this would be to create packages for database access, as well as for authentication and other components of the system. These, of course, use external packages as well. Then, your system imports and uses these packages - instead of including their code within its own code base. Considerations To me, it seems that this would promote code decoupling and help maintainability, almost in a Web-based-vs.-desktop-application kind of way (updates are applied almost automatically, single code base for single functionality, etc.). Does this seem like a rational and sane design concept? Is this actually used as a standard way of structuring applications today? Thanks very much!

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• Update GRUB to reflect changed partition location

  - by soandos

  I currently have 3 partitions: Windows, Ubuntu, and swap. I want to move my windows partition by about 20GB. When I try to do this in GParted, it tells me that this will mess up GRUB, and that there is a page that can resolve these issues. However, this page does not actually mention my issue. I am not moving my boot partition (Ubuntu). How can I force GRUB to look for operating systems that are on the drive? I know that this is possible, because when Ubuntu was installed it found Windows without any issues. Additionally, if I create a copy of a partition, how can I add that to GRUB (I assume it will be the same command as above, but if not, what would it be)? Note: OS prober is mentioned here but it doest not list how to use it, or where to find it.

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• What are the benefits of NoSQL?

  - by geekbrit

  I'm struggling to see how NoSQL brings any advantages to a system, so I'm interested in hearing from people who have chosen to use it, both the reasons they chose NoSQL, and positive and negative experiences in implementation and use. My first impressions are that NoSQL is a product of the availability of very large, very cheap storage; it seems that a million record database could easily have a 100MByte overhead in field labels embedded in the records. This goes against one of my software design instincts - remove redundancy in code and data whenever practical. However, NoSQL is being used with success in large high-traffic systems, so I must be missing something, looking forward to your responses.

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• Computer science [closed]

  - by user73589

  I'm a computer science graduate Information systems department. I graduated this year with GPA 3.8 but I'm totally lost, we didn't work on making applications and writing a lot of codes at college. I feel that if I applied in any job I won't be taken because I don't have any knowledge. I'm a very hardworker but I don't know from where to start and what to do. Should I go for web design and that staff or for Android and mobile applications? What can I do and how to start?

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• Did you know you can shrink a transaction log even when log shipping?

  - by simonsabin

  David's posted a great post on shrinking the transaction log and log shipping. Log shipping and shrinking transaction logs Unlike shrinking the data file shrinking the transaction log isn't a bad thing, IF you don't need the log to be that size. I've seen many systems that shrink the log because it has grown only for it to grow the next day to the same size becuase of an overnight operation. To reduce the growth of the transaction log you need to do one or more of the following, 1.Back it up more frequently2.Change to simple recovery model3.Use minimally logged operations4.Keep transactions short and small5.Break large transactions into smaller transactions6.If using replication ensure that your backup of the replication topology is frequent enough

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• Ubuntu will not start any more !!!!!!!! PLEASE HELP?

  - by mike

  I really need help , I left my computer downloading all the night and i did donwload 35 go of movies ( legal ....) , I restart the computed in the morning then i booted in my encrypted windows partition for my work. Surprise in the evening when i try to boot on linux again , then it doesnt start as it's telling me low graphic mode , and doesnt boot( happen when it's really full ) . Tryed in rescue and it's telling me i have 0 mo free. Tryed in shell comand sdo root rm - Some files IMPOSSIBLE . it's telling me that my files are only in read only file systems. I mouted my other hard drive in windows as well but there is a '' Write protection '' i can only read the files. Please let me know , what solution do i have ? Should i try live usb with ubuntu ? Thanks guys

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• APress Deal of the Day 23/Aug/2014 - Pro Windows 8 Development with HTML5 and JavaScript

  - by TATWORTH

  Originally posted on: http://geekswithblogs.net/TATWORTH/archive/2014/08/23/apress-deal-of-the-day-23aug2014---pro-windows-8.aspxToday’s $10 Deal of the Day from APress at http://www.apress.com/9781430244011 is Pro Windows 8 Development with HTML5 and JavaScript. “Apps are at the heart of Windows 8, bringing rich and engaging experiences to both tablet and desktop users. Windows 8 uses the Windows Runtime (WinRT), a complete reimagining of Windows development that supports multiple programming languages and is built on HTML5, CSS and JavaScript. These applications are the future of Windows development and JavaScript is perfect language to take advantage of this exciting and flexible environment.”

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