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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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• 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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• How can I get gcc to write a file larger than 2.0 GB?

  - by fred.bear

  I wanted to recompile 'xxd' (written in C), so I installed CodeBlocks as the IDE. All seemed to go well unil I discovered that I couldn't write past the 2.0 GB barrier... I've read that 'gcc' needs to be recompiled... (That sounds a bit dramatic..) I've read that I can use 'fread64()' instead of 'fread()' ... (didn't work) I've read something about a compiler options (?)... but I get lost at that point? I am surprised that it didn't work out-of-the-box, as I thought the 2.0 GB limit was ancient history as far as defaults go ... wrong again?:( My OS is 32-bit, on 32-bit hardware. The gcc version report in as: gcc (Ubuntu 4.4.3-4ubuntu5) 4.4.3 Is there a simple way around this issue? PS.. I was fascinated by the WARNINGS: section of 'info xxd' (..only on Linux ;)

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• Getting Started with Component Architecture: DI?

  - by ashes999

  I just moved away from MVC towards something more component-architecture-like. I have no concept of messages yet (it's rough prototype code), objects just get internal properties and values of other classes for now. That issue aside, it seems like this is turning into an aspect-oriented-programming challenge. I've noticed that all entities with, for example, a position component will have similar properties (get/set X/Y/Z, rotation, velocity). Is it a common practice, and/or good idea, to push these behind an interface and use dependency injection to inject a generic class (eg. PositionComponent) which already has all the boiler-plate code? (I'm sure the answer will affect the model I use for message/passing)

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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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• VMWare Player pauses often

  - by pascal

  I'm using a 64bit Windows 8 inside vmplayer, with 2 virtual processor cores, virtual hard disk resides on a fast local disc and is not preallocated; host CPU is Intel i7 3770, should be capable of hardware virtualisation but I don't know if VMWare uses it; NAT networking; Sound card connected, USB connected, accelerated 3D graphics (NVidia 313.30 on host) My problem is, that the VM often pauses for a few seconds, and then speeds up for a few seconds to reach real time again. Time in the VM actually moves faster after the pause, for example all animations using timers speed up. When running, the vmware-vmx process shows ~150% CPU usage in top, but 0% when pausing (and D state i.e. waiting for IO). iotop shows normal disk writes from vmware-vmx threads, but during pauses, the flush kernel thread uses 99%. Are there some options to try so that VMWare doesn't wait for IO? I've tried a few things available from the GUI but the issue never went away…

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• RPi and Java Embedded: Hard-Float Support is Here!!!

  - by hinkmond

  You wanted Java Embedded with Hardware Floating Point support to install on a default Raspian environment for your Raspberry Pi? Well, you just got your wish. Merry Christmas! See: Developer JDK 8 for ARM w/Hard-Float Here's a quote: The Java SE 8 Developer Preview Release for ARM including JavaFX (JDK 8) on Linux has been made available at http://jdk8.java.net. The Developer Preview is provided to the community to get feedback on the ongoing progress of the project. Developers can start developing applications using this build of Java SE 8 on an ARM device, such as the a Raspberry Pi. It's a regular JDK (Java SE 8 preview) for your Raspberry Pi, so you should note this means there is a javac (and the other typical JDK tools) available to compile your Java apps right there on the device! Woot! I'll cover step-by-step instructions how to do that in a future blog post. Stay tuned... Hinkmond

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• How to debug Android App Eclipse?

  - by user2534694

  Ok. So while this isnt a programming question. I wanted to know how do people debug apps? How do you view log cat, and where these exceptions are thrown etc? And do I need to run the app on the emulator to see all the stuff, or is there a way to view this after running the app on my phone(while not being connected to the computer) Links to plugins and tips would be really helpful, as im gonna start work on my next game, and while the first one works fine, had a lot of problems while debugging.

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• How to deploy a single website to multiple physical servers.?

  - by user70122

  I want to deploy my PHP and Ajax based Dating website to multiple physical servers. Does anyone know the method. Is there possible any method to save the files and setting (and also the user input), on all of the physical server, so that the servers do the following jobs. Servers used as a network, speeding up the process giving a robust thing to the end user. Data to be stored on all the servers' hard drivers, and Every server have the internet connection from different provider, so for example a. if any of the internet providers gets down, or b. there occur any hardware or power failure, the website still runs, without a break and without any data loss. Does anyone know about some online course, or some comprehensive tutorials about this topic ?

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• Managed servers getting down regularly by Node Manager. WAD?

  - by csoto

  Recently I have been working on a service request where several instances were running, and several technologies were being used, including SOA, BAM, BPEL and others. At a first glance, this may seem to be a Node Manager problem. But on this situation, the problem was at JMS - Persistent Store level. Node Manager can automatically restart Managed Servers that have the "failed" health state, or have shut down unexpectedly due to a system crash or reboot. As a matter of fact, from the provided log files it was clear that the instance was becoming unhealthy because of a persist6ent Store problem. So finally, the problem here was not with Node Manager as it was working as designed, and the restart was being caused by the Persistent Store. After this Persistent Store problem was fixed, everuthing went fine. This particular issue that I worked was on an Exalogic machine, but note that this may happen on any hardware running Weblogic.

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• Cloud Migration Lifecycle

  - by llaszews

  The first step in migrating to the cloud is the set up phase. This phase includes: 1. Plan Cloud Setup - Create a project plan. 2. Set up infrastructure - The IaaS and PaaS environments need to be installed and configured. This includes databases, network, hardware, disk and application servers. 3. Set up shared components - Are applications, database objects or other components going to be made accessible in the cloud ? These shared components need to be configured and made accessible. 4. Set up self-service portal - Customer self service provisioning, management and monitoring.

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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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• Cant find one particular wireless network. Worked before, but sudenly stopt working.

  - by Haakon

  My first question here. My problem is: I cant find my wireless network at home. Situation: It worked fine 7 days ago. It works with a cable(wierd). I find the network on my ipad/phone. I can connect to wireless hotspot network form my phone and wireless at my university, and it works fine. I can connect to the network in windows What I have tried: Tried this Strange network issue; works on windows, but not on ubuntu, works on campus wireless, but not at home (removing resolve.conf). Hardware and software: I have a Broadcom card Use dual boot ubuntu 12.04 - windows 7 Things I did to make wireless work: blacklist brcmsmac blacklist bcma blacklist b43 blacklist ssb Can anyone help me? I'm about to kill myself(not literary)!! I'm not that good in linux so go gentle on me:)

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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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• Mit Oracle Datenbanken in die Pole-Position!

  - by Alliances & Channels Redaktion

  Stellen Sie sich vor, Sie haben die Wahl zwischen einem hübschen, aber uralten Kleinwagen und einem stylischen Tourenwagen auf technischem Höchststand. Beide haben etwas für sich, keine Frage, doch auf der Rennstrecke, wo es allein um Performance geht, ist Nostalgie fehl am Platz. Nicht anders ist es mit Datenbanken. Wer also Wert auf Leistung, Sicherheit und die optimale Ausnutzung von Hardware und IT-Ressourcen legt, sollte sich für ein Database-Tuning entscheiden. Die wesentlichen Vorteile der Oracle Datenbanken bringt dieses Video kurz und knackig auf den Punkt – und ist damit auch bestens zum Einsatz bei Kunden geeignet. Oracle Database Tuning from Worm Marketing Consulting GmbH on Vimeo.

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• Mit Oracle Datenbanken in die Pole-Position!

  - by Alliances & Channels Redaktion

  Stellen Sie sich vor, Sie haben die Wahl zwischen einem hübschen, aber uralten Kleinwagen und einem stylischen Tourenwagen auf technischem Höchststand. Beide haben etwas für sich, keine Frage, doch auf der Rennstrecke, wo es allein um Performance geht, ist Nostalgie fehl am Platz. Nicht anders ist es mit Datenbanken. Wer also Wert auf Leistung, Sicherheit und die optimale Ausnutzung von Hardware und IT-Ressourcen legt, sollte sich für ein Database-Tuning entscheiden. Die wesentlichen Vorteile der Oracle Datenbanken bringt dieses Video kurz und knackig auf den Punkt – und ist damit auch bestens zum Einsatz bei Kunden geeignet. Oracle Database Tuning from Worm Marketing Consulting GmbH on Vimeo.

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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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• 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 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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• Why Android for new (micro) consoles?

  - by Klaim

  There are a lot of new (micro) consoles with Android inside coming soon or already there (OUYA for example). My question is: why use Android and not another OS as base for these consoles? I assume that there are pragmatic answers to this but I can't see any clear killer feature. For example, one can assume that any stable Linux distribution would work (like Valve seem to think). Android is primarily targetted at mobile platforms which mean it is built around the idea of being interrupted which goes against a lot of what console devs needs in new hardware - but is not killing Android as a platform for gamedev either as it's just a constraint. Why not another OS? What's the Android killer features that make micro-console builder using it instead of Linux or anything else?

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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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• 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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• 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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• Ubuntu 12.04 fails to find Intel HD Graphics 3000

  - by user69785

  On my Windows 7 installation an Intel HD Graphics 3000 card/driver shows. However in Ubuntu 12.04, System ? Administration ? Hardware Drivers shows no proprietary drivers available for the system. I have tried running the following: sudo apt-get install mesa-utils Which results in the graphics driver incorrectly identifying itself as Sandy Bridge Mobile. Running the following results in no change sudo add-apt-repository ppa:xorg-edgers/ppa sudo apt-get update && sudo apt-get upgrade sudo reboot Does anybody have any information on this behavior?

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• Which Linux OS should I use?

  - by dylan0005

  I have use Ubuntu 10.04 & 12.04 but my problem is disk space, I just have 4GB of HDD! awesome considering all hardware that exists nowadays! Notebook Asus eeePC 900 with 2Gb of ram, intel inside CPU. So, which is the best OS should I use? I need one that have no problems with compatibily also that's not be so old. I've tried some of lightly versions like Puppy, slax, LPS us army OS, Precise.... BUT I don't like any of them. What do you think about Debian or Linux Mint?

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