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• Using an external hard drive as a server and be able to connect via wifi [on hold]

  - by user289228

  OK, so i have an old external HDD(seagate 1tb) and a windows computer just in case but im trying to set it up as a server for my home at the moment but if everything goes right i want to transfer it to being a database hub for the business i work for that way i can have more then one register at a time on the same basic database. The thing is im new to the whole server part along with im not well versed with ubuntu either so what im getting at is if i can get it setup, can i connect it on ubuntu and run a linux based Point of sales program but have multiple linked to the single server? i may be able to do it via the router, i think its a belkin n600 with usb port but at this moment i dont know what it is since im not home. i just need information if this is possible and if so, a guide would be appreciated.

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• Launch Specific OEPE Workspace from the Start Menu

  - by user647124

  I frequently have multiple Eclipse-based projects running simultaneously, sometimes on different versions of Eclipse. I have made a mess of a few workspaces by accidentally opening them in the wrong version of Eclipse. To thwart my own forgetfulness, I went seeking a way to launch directly to a workspace and found it at http://stackoverflow.com/questions/209789/starting-eclipse-w-specific-workspace. Essentially, add the -data switch to your icon's open command, such as: C:\eclipse\eclipse.exe -data E:\MyData\Clients\Confidential\EclipseGCDPGive it a unique name and stick it on your Start Menu (C:\ProgramData\Microsoft\Windows\Start Menu). Makes my life a bit easier and hopefully yours, too.

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• How to change the state of a singleton in runtime

  - by user34401

  Consider I am going to write a simple file based logger AppLogger to be used in my apps, ideally it should be a singleton so I can call it via public class AppLogger { public static String file = ".."; public void logToFile() { // Write to file } public static log(String s) { AppLogger.getInstance().logToFile(s); } } And to use it AppLogger::log("This is a log statement"); The problem is, what is the best time I should provide the value of file since it is a just a singleton? Or how to refactor the above code (or skip using singleton) so I can customize the log file path? (Assume I don't need to write to multiple at the same time) p.s. I know I can use library e.g. log4j, but consider it is just a design question, how to refactor the code above?

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• Are things slow for you today - Check your DNS

  - by simonsabin

  Domain name resolution is a very common cause of delays when doing anything over the network whether its accessing a web page or connecting to SQL Server. Everything uses DNS. TCP/IP works with IP addresses and not friendly names. When using names you have to have a way of resolving names to IP addresses and thats what DNS does. If your DNS is wrong then you'll get delays and also potentially odd results. For instance if you have multiple DNS servers configured you may find that occasionally...(read more)

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• Is there a limit on the number of threads that can be spawned simultaneously?

  - by georgesl

  Yesterday I came across this question: How can i call robocopy within a python script to bulk copy multiple folders?, and I though it might be a good exercise for multithreading. I though of spawning as many threads as files needed to be copied, each routine having an exception handling system to prevent the whole copying process from crashing (and log -using mutex on the log file - if there was an error). My question: Is there a limit on the number of thread you can spawn almost simultaneously? If yes, what is the limiting factor? My question is focused on PC desktop, but I welcome any answer on different hardware (embedded systems, calculus clusters, etc.).

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• Help with Dial Up

  - by iSeth

  I am trying to set up a computer for my friend that has dial up. The problem is nothing I try can detect the modem. GnomePPP can't find it and I can't figure Kppp out. I've been looking all over the net on my ethernet trying to find an answer but I keep getting routed back here. I have also tried using scanModem and it finds something like Conexant Systems, Inc. HCF 56k Data/Fax/Voice Modem but the rest of it is really confusing. I've also tried this but I'm not very terminal savvy and it didn't work. It seems like I have to compile a driver but I don't know which one or how to do it. I have also tried multiple modems. Any help would be appreciated. Thanks EDIT: scanModem thinks the modem is disabled on startup. EDIT: I reinstalled Ubuntu but the problem persists.

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• Fast lighting with multple lights

  - by codymanix

  How can I implement fast lighting with multiple lights? I don't want to restrain the player, he can place an unlimited number and possibly overlapping (point) lights into the level. The problem is that shaders which contain dynamic loops which would be necessary to calculate the lighting tend to be very slow. I had the idea that if it could be possible at compiletime to compile a shader n times where n is the number of lights. If the number n is known at compiletime, the loops can be unrolled automatically. Is this possible to generate n versions of the same shader with just a different number of lights? At runtime I could then decide which shader to use for which part of the level.

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• Clarify the Single Responsibility Principle.

  - by dsimcha

  The Single Responsibility Principle states that a class should do one and only one thing. Some cases are pretty clear cut. Others, though, are difficult because what looks like "one thing" when viewed at a given level of abstraction may be multiple things when viewed at a lower level. I also fear that if the Single Responsibility Principle is honored at the lower levels, excessively decoupled, verbose ravioli code, where more lines are spent creating tiny classes for everything and plumbing information around than actually solving the problem at hand, can result. How would you describe what "one thing" means? What are some concrete signs that a class really does more than "one thing"?

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• Help us with our git workflow

  - by Brandon Cordell

  We have a web application that gets deployed to multiple regions around our state. An instance of the application for each region. We maintain a staging and production (master) branch in our repository, but we were wondering what is the best way of maintaining each instances codebase. It's similar at the core, but we have to give each region the ability to make specific requests that may not make it into the core of the application. Right now we have branches for each region, like region_one_staging, and region_one_production. At the rate we're growing we'll have hundreds of branches here in the next few years. Is there a better way to do this?

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• How can I create a VBO of a type determined at runtime?

  - by lapin

  I've written a Vbo template class to work with OpenGL. I'd like to set the type from a config file at runtime. For example: <vbo type="bump_vt" ... /> Vbo* pVbo = new Vbo(bump_vt, ...); Is there some way I can do this without a large if-else block such as: if( sType.compareTo("bump_vt") == 0 ) Vbo* pVbo = new Vbo(bump_vt, ...); else if ... I'm writing for multiple platforms in C++.

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• Laptop overheats while using Internet

  - by therealnube

  YES I have figured out that my laptop overheats while using the internet via an Ethernet port through a broadband connection.Strange isn't it ? Well I need to know WHY ? . I have installed ATI Graphics : Vesa Madison as they appear to be working very fine. Temperature of my i7-hp pavilion dv6 rises from 67degrees to a superhot 85+ and also to 106degrees where my laptop shuts down. When running torrents or Chromium I hardly open 4 Tabs so there is no chance for CPU over-loading due to multiple processes.NEED HELP.And Thank You for your time.

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• GPG Workflow in 11.04

  - by Ross Bearman

  At work we handle the transfer of small bits of sensitive data with GPG, usually posted on a secure internal website. Until Firefox 4 was released, we used FireGPG for inline decryption; however the IPC libraries that it relied upon were no longer present in FF4, making it unusable and it will no longer install in FF5. Currently I'm manually pasting the GPG blocks into a text file, then using the Nautilus context-menu plugin or the command line to decrypt the contents of the file. When we're handling large amount of these small files throughout the day this starts to become a real chore. I've looked around but can't seem to find much information on useful GPG clients in Ubuntu. A client that allowed me to paste in a GPG block and instantly decrypt it, and also paste in plaintext and easily encrypt it for multiple recipients would be ideal. So my question is does this exist? I can't seem to find anything about this with obvious searches on Google, so hopefully someone here can help, or offer an alternative workflow.

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• New Solaris Cluster!

  - by Jeff Victor

  We released Oracle Solaris Cluster 4.1 recently. OSC offers both High Availability (HA) and also Scalable Services capabilities. HA delivers automatic restart of software on the same cluster node and/or automatic failover from a failed node to a working cluster node. Software and support is available for both x86 and SPARC systems. The Scalable Services features manage multiple cluster nodes all providing a load-balanced service such as web servers or app serves. OSC 4.1 includes the ability to recover services from software failures, failure of hardware components such as DIMMs, CPUs, and I/O cards, a global file system, rolling upgrades, and much more. Oracle Availability Engineering posted a brief description and links to details. Or, you can just download it now!

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• Creating Objects

  - by user1424667

  I have a general coding standard question. Is it bad practice to initialize and create an object in multiple methods depending on the outcome of a users choice. So for example if the user quits a poker game, create the poker hand with the cards the user has received, even if < 5, and if the user played till the end create object to show completed hand to show outcome of the game. The key is that the object will only be created once in actuality, there are just different paths and parameters is will receive depending on if the user folded, or played on to the showdown.

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• Adding a 'network' USB printer

  - by AndrewK

  I have a HP Deskjet 1050a printer, hence the 'network' in the title. Its a bog standard USB home printer. I have it attached to my router (has a USB port in it). I have got it connected and working to with Win8 PC and also a MacBook Air. Can't seem to get it to add as a printer to my Xubuntu laptop(s). It doesn't get detected automatically (not an actual network printer) and i've tried multiple options to get it working. It seems to add it but when printing a test page its saying the printer isn't connected. Ping works fine so it can see it, just can't add it as a printer. With Win8 I had to create a port with the IP of the printer (192.168.1.253 in this case), is there an Ubuntu alternative to do this?

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• Google I/O 2012 - Navigation in Android

  Google I/O 2012 - Navigation in Android Adam Powell, Richard Fulcher An app is useless if people can't find their way around it. Android introduced big navigation-support changes in 3.0 and 4.0. The Action Bar offers a convenient control for Up navigation, the Back key's behavior became more consistent within tasks, and the Recent Tasks UI got an overhaul. In this talk, we discuss how and why we got where we are today, how to think about navigation when designing your app's user experience, and how to write apps that offer effortless navigation in multiple Android versions. For all I/O 2012 sessions, go to developers.google.com From: GoogleDevelopers Views: 31 0 ratings Time: 01:01:53 More in Science & Technology

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• Jazoon, JAX California, and Brazilian week - it's conference season again

  - by alexismp

  Sparky is on the road again with GlassFish presence around the world in multiple conferences. This past week Jazoon in Zurich had Java EE, GlassFish, JAX-RS, Servlet, JSF all covered while JAX in California also had a good number of Java EE-related talks (see this Java EE 7 article). FISL, the largest Open Source conference in Brazil (7500 participants last year) is coming up this week with OpenJDK, GlassFish, JavaFX, NetBeans, Java EE 7, and of course JDK 7 all covered by subject matter experts. Expect most of these talks and possibly demos to show up here on TheAquarium, on slideshare or on our YouTube channel.

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• Why is not there a python compiler to native machine's code?

  - by user2986898

  As I understand, the cause of the speed difference between compiled languages and python is, that the first compiles code all way to the native machine's code, whereas python compiles to python bytecode, to be interpreted by the PVM. I see that this way python codes can be used on multiple operation system (at least in most cases), however I do not understand, why is not there an additional (and optional) compiler for python, which compiles the same way as traditional compilers. This would leave to the programmer to chose, which is more important to them; multiplatform executability or performance on native machine. In general; why are not there any languages which could be behave both as compiled and interpreted?

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• Stairway to T-SQL DML Level 4: The Mathematics of SQL: Part 1

  A relational database contains tables that relate to each other by key values. When querying data from these related tables you may choose to select data from a single table or many tables. If you select data from many tables, you normally join those tables together using specified join criteria. The concepts of selecting data from tables and joining tables together is all about managing and manipulating sets of data. In Level 4 of this Stairway we will explore the concepts of set theory and mathematical operators to join, merge, and return data from multiple SQL Server tables. Get Smart with SQL Backup Pro Powerful centralised management, encryption and more.SQL Backup Pro was the smartest kid at school Discover why.

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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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• How can I change my career from windows server admin to software developer?

  - by hyder

  well am an Engineering Graduate in Telecommunication Engineering... I got into Server Support job soon finishing my college ,as at that time it was a recession period ... I have total exp of 2 years in windows server support but due to multiple shifts environment I want to change my profile into software line. Please suggest what would be best for me to take next step.. what exactly course\certification I should do to change my profile as software Developer. Am interested in making my career in software ..please advise as I am in big confusion and not able to work with full satisfaction!! Thank you....

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• Adding a short delay between bullets

  - by Sun

  I'm having some trouble simulating bullets in my 2D shooter. I want similar mechanics to Megaman, where the user can hold down the shoot button and a continues stream of bullets are fired but with a slight delay. Currently, when the user fires a bullet in my game a get an almost laser like effect. Below is a screen shot of some bullets being fired while running and jumping. In my update method I have the following: if(gc.getInput().isKeyDown(Input.KEY_SPACE) ){ bullets.add(new Bullet(player.getPos().getX() + 30,player.getPos().getY() + 17)); } Then I simply iterate through the array list increasing its x value on each update. Moreover, pressing the shoot button (Space bar) creates multiple bullets instead of just creating one even though I am adding only one new bullet to my array list. What would be the best way to solve this problem?

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• Alternatives to voxel-based terrain

  - by Neomex

  Are there any alternatives to voxel based terrains? Such terrain should be fully destructable, allow for arches, overhangs, preserve sharp features where needed and keep consistent topology. Maybe you can explain the problem that makes you ask this question? Voxel based terrain is basically just using a 3D grid of data to store data. There are lots of ways to render that data, but it doesn't get much simpler for storing it. – Byte56 Current isosurface extraction methods aren't most effective/bug-free. Cubical Marching Squares seem to solve most of the issues, however it is a relatively new method and there aren't too many resources about it. (I've found single university paper) Even if we stick to CMS, when we want to add multi-material support, we can either divide surface into multiple meshes, or pass a texture array or texture atlas to shaders, then we are limited to set amount of textures and additionally increase memory-usage alot.

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• How to fix "The system is running in low-graphics mode" error?

  - by jokerdino

  Note: This is an attempt to create a canonical question that covers all instances of "low-graphics mode" error that occurs to a user, including but not limited to installation of wrong drivers, incorrect or invalid lightdm greeters, low disk space, incorrect installation of graphics card like ATI and Nvidia, incorrect configuration of xorg.conf file while setting up multiple monitors among others. If you are experiencing the "low-graphics mode" error when trying to login but none of the following answers work for you, please do ask a new question and then update the answers of this canonical question as and when your new question gets answered. When I try to boot into my computer, I am getting this error: The system is running in low-graphics mode Your screen, graphics cards, and input device settings could not be detected correctly. You will need to configure these yourself. How do I fix the failsafe X mode and login into my computer? Answer index: The greeter is invalid

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• Kernel won't update automatically

  - by Bucic

  My current kernel is 3.2.0-26 (my main computer) while on another of my Ubuntu computers, with which I didn't fiddle with unofficial updates, it's 3.2.0-30. Yet the Update manager on my main computer doesn't show available kernel updates. It shows other updates though. I suspect is due to the fact that in the past I installed multiple mainline kernel versions (not recommended versions), up to 3.5* series. What I'm after: Either: Fix automatic kernel updates. Or: Learn about a way to check for the latest official ubuntu kernel version and get it manually (I know how to install kernels from debs) What I have already tried: Uninstalled unused kernels including "the generic one without a number".

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