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• Windows 7 restarts PC when selected from GRUB Menu

  - by Dan Still

  I installed windows 7 on a RAID 5 (2@160GB SATA +1@160GB SATA for RAID 5) I then proceeded to install Ubuntu 11.10 using the Live CD and opted: "Install along side Windows 7 Option" Upon boot GRUB appears normally and I can select and run Ubuntu with no difficulties. When I select Windows 7 from GRUB the PC restarts and consequently goes back to GRUB. I have attempted to use the Windows 7 DVD to repair the installation but to no avail. The Wizard ran twice as it described it might, after the second attempt came back with an '...inability to repair...' error. I am sure there is an answer to this somewhere but I have yet to be able to find it. (2 weeks and countless attempts and searches before posting this question. Although I am happy to use Ubuntu alone my wife likes to watch Netflix and therein requires the Windows 7 installation. Any answers are appreciated and welcomed. Thanks in advance. Dan Still

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• JavaFX 2.0 vs Qt for cross platform stand-alone application

  - by Tsuroo

  I need a bit of advice from you developers who deal with cross-platform applications (specifically programs with a GUI). I will be creating an application soon that needs to be cross-platform and so I have done some preliminary research on two different frameworks: JavaFX 2.0 and Qt. Honestly, both would more than suit my needs. So then I asked myself why I would choose one over the other (SPOILER ALERT: I don't know the answer :P ). I do know that JavaFX 2.0 is rather new (as of 2012) and is not fully supported across platforms, but it will be eventually. The question I pose is this: which one of these would you use for a cross-platform application, and what criteria did you look at when making that decision? Thank you for taking the time to read this! :)

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• Why do you need float/double?

  - by acidzombie24

  I was watching http://www.joelonsoftware.com/items/2011/06/27.html and laughed at Jon Skeet joke about 0.3 not being 0.3. I personally never had problems with floats/decimals/doubles but then I remember I learned 6502 very early and never needed floats in most of my programs. The only time I used it was for graphics and math where inaccurate numbers were ok and the output was for the screen and not to be stored (in a db, file) or dependent on. My question is, where are places were you typically use floats/decimals/double? So I know to watch out for these gotchas. With money I use longs and store values by the cent, for speed of an object in a game I add ints and divide (or bitshift) the value to know if I need to move a pixel or not. (I made object move in the 6502 days, we had no divide nor floats but had shifts). So I was mostly curious.

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• What are the leading professional journals in software development?

  - by Austin Hyde

  In one of my classes, we were asked to research the top professional journals in our field. According to what I can dig up, the ACM and IEEE journals are the "best", as they come up at the top of my searches and this question. However, there are a dozen or so individually topic-ed journals for each, with no very clear measure of which one is most useful, popular, etc. For example, "IEEE Software" vs. "IEEE Transactions on Software Engineering". So, what do you consider to be the "leading" professional journals (specifically), and why? It doesn't have to be only ACM or IEEE, either. If you know of another, please add it.

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• Expected sprint completion rate and load in scrum?

  - by bjarkef

  Recently at work there have been increased focus on completion rate and load on the developers in our sprints. With completion rate I mean, if we plan 20 user stories for a sprint, what percentage of these user stories are closed at the end of the sprint. And with load I mean, if we have a sprint with 3 developers of 60 hours each, i.e. 180 hours for the sprint, how many hours worth of user stories do we schedule for the sprint. So I am really interested in others experience with this, I guess this is something everybody working with scrum deals with. My question is, what completion rate and load are expected/usual, and how are your team doing with respect to these parameters?

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• Structured work-environment in comparison to an unstructured one [closed]

  - by Phoenix

  I was asked in an interview whether the environment I work in is structured or unstructured. I believe at their end it is unstructured. How will my answer hurt or help my chances at the company ? And what is it intent of this question ? The place where I work it is structured in terms of the technologies we use but all of us work pretty independently on the individual problem. Is this a sufficient explanation. What individual areas I can highlight to support my answer ?

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• How does Google maintain its codes?

  - by John Maxim

  Pagerank algorithm is not revealed to any of their associates programmers, but only accessible by Larry Page or maybe Sergey Brin. I wonder how do they go about managing their coding? There are times when you need to build something up and you may need more hands to help with coding, but you may also want to keep some secrets to yourself, I'm not saying I have secrets, but I wonder how do they manage their coding. I'm sure there are some ways to do it decently and professionally. The reason why friendster failed was because one of the factors they lost control over their coding part. I think this is an interesting question. But not easy to answer, maybe only a marginal knew.

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• Internationalization of non-english application

  - by Jacket

  I know there are lots of posts for internationalization, but this is something I didn't found while searching. I have a PHP Web application, which is pretty big right now. It's developed actively for 4 years and wasn't built with internationalization in mind. Text is everywhere - in plain HTML, in PHP variables, in echo's, in the DB... Now I'm familiar with the concept of gettext and this is what i plan to use for the internationalization project of the application. However the app is not written in English and here is my question: Should I first translate everything to English while wrapping every string in gettext() function, or I can use my native language as a base? P.S. also any quick suggestions (links maybe) on making my life easier with the whole i18n project will be greatly appreciated!

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• How do I set up a virtual network interface with its own IP address?

  - by Stefano Palazzo

  I vaguely remember that it's possible to set up virtual network interfaces with their own IP addresses, using only one physical network connection. I can find a few guides on the internet that recommend setting these up in /etc/network/interfaces, but Ubuntu doesn't use this file. Therefore my question: What's the correct way of setting these up in recent versions of Ubuntu? As this is a laptop, and I need it to connect to all kinds of different networks, I want to keep the network manager and all its configuration. To be more clear: at the end of this, I want to have a new network interface (e.g. "eth42") with its own IP address, but using whatever is connected in network manager to send the actual packets. In NM, it should appear as if I just had a second ethernet adapter installed in my system.

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• Virtualbox: host only networking - proxy internet connection

  - by Russell

  I'll ask my question first, then give details about where I am coming from: Is it possible to use host only, then have ubuntu act as a proxy to provide internet access to windows? If so, how? I am trying to get the right combination of networking for my virtualbox windows client VM (win7). My host is ubuntu 10.10 (maverick). I believe I understand the basic network options (please correct me if I am incorrect): NAT - Host can't communicate with guest but guest has access to all host's adapters Host only - Separate adapter but guest has no net access Bridged - bridge an adapter in the host with the virtual adapter to give the host access to the host adapter I am trying to give my win guest internet access, but also access the host in a separate network. Bridged only works when the host is connected to the internet (this is a laptop) so when it's not connected the network is down. Thanks I appreciate your help.

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• What Is the Purpose of the “Do Not Cover This Hole” Hole on Hard Drives?

  - by Jason Fitzpatrick

  From tiny laptop hard drives to beefier desktop models, traditional disk-based hard drives have a very bold warning on them: DO NOT COVER THIS HOLE. What exactly is the hole and what terrible fate would befall you if you covered it? Today’s Question & Answer session comes to us courtesy of SuperUser—a subdivision of Stack Exchange, a community-drive grouping of Q&A web sites. How Hackers Can Disguise Malicious Programs With Fake File Extensions Can Dust Actually Damage My Computer? What To Do If You Get a Virus on Your Computer

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• Freeing disk space on Ubuntu to use in Windows

  - by Alex

  I have 250Gb drive on a laptop, which has Windows 7 on a 122Gb ntfs partition (which has a "boot" flag on it) and Ubuntu 12.04.1 on a 110Gb extended partition, of which the root ext4 partition is 108Gb and the swap is 1.74Gb. You can see everything in the screenshot below. My question is: I want to diminish the size of the linux root partition and then use that space to increase the windows partition. How do I do that? Also, is it possible to increase the size of the swap partition and not do any damage? If so, how? I'm using GParted, and i'd say i'm pretty confident with it. Screenshot of my partitions

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• Best way of Javascript web development in Netbeans (Hot deployment)

  - by marcelocbf

  I'm beginning Javascript development and as a beginner in JavaScript I make a lot of mistakes. The way I'm developing is very counter-productive because every mistake I fix I have to shutdown Glassfish, re-build the app and re-deploy it. My app is a Java back-end with REST services and the Html, JavaScript, CSS for the frontend. Everything is packed in a .ear file. As of right now, I'm just working with the frontend but I do have to make this whole process to update the files. My question is ... is there a better way of doing this? Can somebody tell how do you guys work in a similar setup to do the everyday development?

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• Non-English-based programming languages

  - by Jaime Soto

  The University of Antioquia in Colombia teaches its introductory programming courses in Lexico, a Spanish-based, object-oriented .NET language. The intent is to teach programming concepts in the students' native language before introducing English-based mainstream languages. There are many other Non-English-based programming languages and there is even a related question in Stack Overflow. I have several questions regarding these languages: Has anyone on this site learned to program using a non-English-based language? If so, how difficult was the transition to the first English-based language? Is there any research-based evidence that non-English speakers learn programming faster/better using languages with keywords in their native language instead of English-based languages?

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• What discipline does Computer Science belong to?

  - by Macneil

  Is Computer Science science, applied mathematics, engineering, art, philosophy? "Other"? To provide background, here is Steven Wartik's blog posting for Scientific American titled "I'm not a real scientist, and that's okay." The article covers some good topics for this question, but it leaves open more than it answers. If you can think of the discipline, how would computer science fit into its definition? Should the discipline for Computer Science be based on what programmers do, or what academics do? What kind of answers do you get from people who've seemed to think deeply about this? What reasons do they give?

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• Polymorphism and passing

  - by Tucker Morgan

  Ok i am going to try and state my question as clearly as possible, but if you have trouble understanding it please just ask for clarification, i really want to figure out how to do this. I am writing a text based RPG, and i have three class that inherit from a super class, they all have special attacks that they can preform, at the same time i have a class that holds the function which handles battles in my game. Now how do i get the unique special abilities functions for whatever role the player chooses into the battle function. Also i am using the vector.push_back method to handle how my sub classes are referenced Please help me your my only hope

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• Why not Green Threads?

  - by redjamjar

  Whilst I know questions on this have been covered already (e.g. http://stackoverflow.com/questions/5713142/green-threads-vs-non-green-threads), I don't feel like I've got a satisfactory answer. The question is: why don't JVM's support green threads anymore? It says this on the code-style Java FAQ: A green thread refers to a mode of operation for the Java Virtual Machine (JVM) in which all code is executed in a single operating system thread. And this over on java.sun.com: The downside is that using green threads means system threads on Linux are not taken advantage of and so the Java virtual machine is not scalable when additional CPUs are added. It seems to me that the JVM could have a pool of system processes equal to the number of cores, and then run green threads on top of that. This could offer some big advantages when you have a very number large of threads which block often (mostly because current JVM's cap the number of threads). Thoughts?

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• Can and should UDF be used as a hard drive format?

  - by dlamblin

  Several time recently I've seen UDF suggested as the solution to a cross platform format for a drive used on Linux, Mac OS X and Windows XP and above. I've searched here and not found the same suggestion (most are suggesting ntfs-3g which seems to cost money and isn't preinstalled on a Mac). So my question is: how is this done right, and has anyone done this? Have you then filled up the drive and deleted some files to make space finding that everything works like a real r/w format even though it seems to have been primarily a write once format?

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• Code Reuse and Abstraction in FP vs OOP

  - by Electric Coffee

  I've been told that code reuse and abstraction in OOP is far more difficult to do than it is in FP, and that all the claims that have been made about Object Orientedness (for lack of a better term) being great at reusing code have been flat out lies So I was wondering if anyone here could tell me why that is, and perhaps show me some code to back up these claims, I'm not saying I don't believe you Functional programmers, it's just that I've been "indoctrinated" to think Object Orientedly, and thus can't (yet) think Functionally enough to see it myself To quote Jimmy Hoffa (from an answer to one of my previous questions): The cake is a lie, code reuse in OO is far more difficult than in FP. For all that OO has claimed code reuse over the years, I have seen it follow through a minimum of times. (feel free to just say I must be doing it wrong, I'm comfortable with how well I write OO code having had to design and maintain OO systems for years, I know the quality of my own results) That quote is the basis of my question, I want to see if there's anything to the claim or not

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• General approach to isometrics

  - by MrThys

  I am currently discovering the world of isometrics, now I found out there are two approaches to creating the tilemap; Just create 2:1 ratio tile-images and draw those. Creating squares and transforming them to the 2:1 ratio. What is the general approach on developing an isometric game? Now I was wondering a few things; How do more known games like AOE1/2 do this? What are the pros/cons of both methods? Which method is preferred to be used in this day and age? Edit added more general question

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• Virtual Brown Bag Recap: JB's New Gem, Patterns 101, Killing VS, CodeMav

  - by Brian Schroer

  At this week's Virtual Brown Bag meeting: JB showed off his new SpeakerRate Ruby gem Claudio alerted us to the Refactoring Manifesto We answered the question "How do I get started with Design Patterns?" Ever had to kill a frozen instance of Visual Studio? Yeah, I thought so. Claudio showed us how to do it with PowerShell. (It's faster) JB previewed his new CodeMav web site, which will be a social network for developers (integration with Speaker Rate, slide share, github, StackOverflow, etc.) For detailed notes, links, and the video recording, go to the VBB wiki page: https://sites.google.com/site/vbbwiki/main_page/2011-01-06

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• Login screen restarts while entering password

  - by Shane L

  I am having a problem that only occurred after installing the fglrx proprietary driver through the additional drivers app. The exact same issue is described in this question, however it's closed. Must login twice before entering Unity; first login screen has graphical anomalies When I boot up my computer, once I get to lightdm login screen I will start typing my password, and upon the entering of two of my password characters "n2" the screen will start displaying some corruption in the very top edge of the screen, then after I hit the number 2, lightdm seems to crash and it will restart and everything is fine, I can login from that point. So the issue is, every time I reboot, I have to login once, allow lightdm to crash and restart, then login as normal. The issue did not occur prior to installing fglrx, and has happened through several reinstalls.

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• Git branching and tagging best practices

  - by Code-Guru

  I am currently learning to use Git by reading Pro Git. Right now I'm learning about branching and tags. My question is when should I use a branch and when should I use a tag? For example, say I create a branch for version 1.1 of a project. When I finish and release this version, should I leave the branch to mark the release version? Or should I add a tag? If I add a tag, should I delete the version branch (assuming that it is merged into master or some other branch)?

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• shader coding: calculate screen coordinates of fragment

  - by Jay

  Good morning, I'm new to shader coding and trying to implement some visual effects code in shaders using billboards. (Yes, I couldn't have picked anything harder to start with, but I'm lucky that way) Setup: I have rendered the full screen z depth to an array of floats in a previous pass. In the fragment shader I need the scene depth where the rendered fragment is displayed (to see if it's occluded). I can use tex2d() to get the depth value if I have the screen coordinates of the point being rendered in the fragment shader. Question: In the fragment shader how do you calculate the screen coordinates of the pixel (in the range 0-1.0)? Is the position passed to the fragment shader a pixel offset? If so, I guess it would be: float2( position.x / screen-width, position.y / screen-height ) Thanks for any help/

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• App Store: Profitability for Game Developers

  - by Bunkai.Satori

  Recent days, I've been spending significant time in discovering chances of profitability of AppStore for developers. I have found many articles. Some of them are highly optimistic, while other are extremely skeptical. This article is extremely skeptical. It even claims to have backed its conclusions by objective sales numbers. This is another pesimistic article saying that games developed by single individuals get 20 downloads a day. Can I kindly ask to clarify from business viewpoint whether average developers publishing games and software on AppStore can cover their living expenses, even, whether they can become profitable? Is it achievable to generate revenues of 50.000 USD yearly on AppStore for a single developer? I would like to stay as realistic as possible. Despite the question might look subjective, a good business man will be able to esitmate chances for profitability and prosperity within AppStore.

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