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  • How to add a link group to update-alternatives?

    - by Kurtosis
    Is it possible to add a custom link group to update-alternatives that is not already there by default? For example, I want to add Scala and all its supporting binaries as a link group 'scala'. I'm trying using this script, but keep getting the error: update-alternatives: error: unknown argument `' I'm not sure what that means, but after troubleshooting the script a bit with no luck, I'm wondering if update-alternatives has a hard-coded list of link groups, that can't be added to, and that doesn't include scala. PS - any chance someone with higher karma can create an update-alternatives tag? Seems this topic gets a decent number of questions, but no tag for it.

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  • Book (or resource) on Java bytecode

    - by Andrea
    I am looking for some resources on the JVM bytecode. Ideally I would for a short book; something more than a blog post but not a 800 pages tome. If it is relevant, I am a Scala developer, not a Java one, although I know Java just fine. I would like something that allowed me to read JVM bytecode and answer questions such as: Why does the bytecode has to know about high level construct such as classes? Are subtyping relations still visible in bytecode? How does type erasure work exactly? How do Oracle and Dalvik bytecode differ, and what consequences does this have for, say, developing Android apps with Scala? How does the JVM manage the stack, and why exactly this creates issues with tail call elimination? and so on.

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  • Changelog Management

    - by Gnial0id
    I'm currently developing a WinForm application. In order to inform the client about the improvements and corrections made during the last version, I would like to manage and display a changelog. I mostly found existing changelog on website (the term changelog is pretty used) or explanation on how to manage the release numbers, which I don't care. So, these are my questions: How do I manage a changelog (using XML, pure text in the app, etc.) in a desktop application? How do I present it to the user (external website, inside the winform application)?

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  • Using Ubuntu without any knowledge of Linux

    - by Kiran Aaditya Jhonny
    Can I still install and use Ubuntu without any basic knowledge of a Linux operating system - do I need any background knowledge of Linux to use Ubuntu? If so, what will be the limits of my experience? Also, I heard from http://www.whylinuxisbetter.net/ that I don't need any drivers for hardware and peripherals. Can somebody shed some light on this statement? P.S. I don't know if these questions have been asked yet, I searched for these (maybe I didn't search hard enough), but I didn't find any.

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  • Being a good mentee - a protégé.

    - by marked
    The complement of the Being a good mentor question. I work with many very senior people that have vast amounts of knowledge and wisdom in Software, Engineering and our business domain. What are some tips for gaining as much knowledge from them? I don't want to take up too much of their time, but also want to take full advantage of this since it really could help develop my skills. What are some good questions to get the conversation rolling in a sit down mentor/mentee session? Some of the people providing mentorship have little experience in this area, so it would help to be able to lead some of these discussions.

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  • What C++ libraries can be used in game development [closed]

    - by RedShft
    I'm currently in the planning stage for my next game, and since I've been away from C++ for a while I have some questions about helpful libraries. I plan on making a 2D game with SDL, constructing my own simple 2D engine. I plan on making this game for the PC. What libraries would you recommend to make this process easier? What about unittests? What about an enforce operator to throw exceptions? int a = 1; enforce(a == 2); //Throws an exception, Specifically, i'm looking for general purpose libraries, that implement that make my life easier (like boost). Also, a helpful library for physics/collision, AI, XML file parsing (specifically working with the Tiled map editor), and any others that you guys have used that are useful in a 2D game.

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  • Oct 5th DevReach in Sofia, Bulgaria

    - by Sahil Malik
    SharePoint 2010 Training: more information I will be at DevReach, my top favorite conference on Oct 5th. I have been visiting Devreach since it’s very inception. I don’t do a lot of conferences, just 3 or 4 a year. I am super duper picky about what conferences I attend. One of the key reasons I love visiting DevReach is the audience quality. The developers in Bulgaria are shockingly intelligent. I have always enjoyed the extremely intelligent questions and conversations I get to engage in at DevReach. And Sofia is an amazing city to top it all. My sessions this year are as follows, Day 2, 11:30 - 12:30 Architecture SPvNext – A Look At All the Exciting And New Features In SharePoint Day 2, 09:00 - 10:00 Architecture Read full article ....

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  • How to estimate tasks in scrum?

    - by Arian
    Let's say we have a backlog of User Stories, each with an estimated number of Story Points, and now we're doing the Sprint Planning. Now, the Stories should be broken down into tasks and many Scrum resources suggest that each task should be estimated in person-hours. Since all questions have been discussed by the team at this point, estimating a task should not take longer than a minute. However, since a task should not be longer than a day, assuming a three week sprint with 8 developers means 120 tasks, and taking two hours only for estimations seems to be a bit much to me. I know that experienced teams can skip or short-cut task estimations, but let's say we're not at that stage yet. In your experience, how many tasks are there in a sprint* and how long should it take to estimate all of them? (Estimating only half of them doesn't make much sense, does it?) (*) I know that depends on sprint length and team size, so let's assume 8 developers and three weeks.

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  • Zookeeper naming service [closed]

    - by kolchanov
    I need a recommendation for naming service implementation. We are ISV and we have a lot of applications (services) with very different protocols such as http (Rest), low level tcp, amqp, diameter, telco protocols Rx, Ry, Ud and many others. We want to simplify configuration, deployment and service discovery procees and it seems that It's time to create central configuration registry. So I have few questions: - is zookeeper suitable for this purpose? - does exists more suitable and more special solution? - best practice for service naming for discoverin. Any standards? - recommendation for service configuration data structure Also we are keeping in mind future tasks For dynamic application distribution in a private cloud. Could you share your real life experience?

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  • Total Cloud Control for Systems - Webcast on April 12, 2012 (18:00 CET/5pm UK)

    - by Javier Puerta
    Total Cloud Control Keeps Getting BetterJoin Oracle Vice President of Systems Management Steve Wilson and a panel of Oracle executives to find out how your enterprise cloud can achieve 10x improved performance and 12x operational agility. Only Oracle Enterprise Manager Ops Center 12c allows you to: Accelerate mission-critical cloud deployment Unleash the power of Solaris 11, the first cloud OS Simplify Oracle engineered systems management You’ll also get a chance to have your questions answered by Oracle product experts and dive deeper into the technology by viewing our demos that trace the steps companies like yours take as they transition to a private cloud environment. Register today for this interactive keynote and panel discussion. Agenda 18:00 a.m. CET (5pm UK) Keynote: Total Cloud Control for Systems 18:45 a.m. CET (5:45 pm UK) Panel Discussion with Oracle Hardware, Software, and Support Executives 19:15 a.m. CET (6:15 UK) Demo Series: A Step-by-Step Journey to Enterprise Clouds

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  • .NET Compiler Platform (Roslyn) , its relevance to developer community and its performance? [on hold]

    - by jerriclynsjohn
    I'm just starting out with a Code-Quality-plugin development for my organization based on the recently released .NET Compiler Platform APIs (Roslyn APIs). I would like to know what are the most relevant possible ways that it could be used by the developer community apart from the usual IDE experience as answered in other questions. I was wondering the implications of opening up a compiler to general public and never came across anything "breakthrough", that could possibly add up to the value of IDE experiences. Is there any performance bottleneck for its implementation since the compiler itself is managed code?

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  • How do I keep track of modifications to a new server?

    - by eveo
    I purchased a server for the sole purpose of familiarizing myself with the CLI so I don't get royally screwed when I enter a real development environment. However, I have some questions. I've managed to SSH into my server, all is fine and dandy, installed LAMP too which went flawlessly. Now I'm wondering, the more changes I do, the more cluttered my server will become. Can I revert changes? I don't want to keep customizing things and installing things and just having a cluttered server overall. Where can I track changes to my system?

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  • Apps UX Launches Blueprints for Mobile User Experiences

    - by mvaughan
    By Misha Vaughan, Oracle Applications User ExperienceAt Oracle OpenWorld 2012 this year, the Oracle Applications User Experience (Apps UX) team announced the release of Mobile User Experience Functional Design Patterns. These patterns are designed to work directly with Oracle’s Fusion Middleware, specifically, ADF Mobile.  The Oracle Application Development Framework for mobile users enables developers to build one application that can be deployed to multiple mobile device platforms. These same mobile design patterns provide the guidance for Oracle teams to develop Fusion Mobile expenses. Application developers can use Oracle’s mobile design patterns to design iPhone, Android, or browser-based smartphone applications. We are sharing our mobile design patterns and their baked-in, scientifically proven usability to enable Oracle customers and partners to build mobile applications quickly.A different way of thinking and designing. Lynn Rampoldi-Hnilo, Senior Manager of Mobile User Experiences for Apps UX, says mobile design has to be compelling. “It needs to be optimized for the device, and be visually rich and simple,” she said. “What is really key is that you are designing for a user’s most personal device, the device that they will have with them at all times of the day.”Katy Massucco, director of the overall design patterns site, said: “You need to start with a simplified task flow. Everything should be a natural interaction. The action should be relevant and leveraging the device. It should be seamless.”She suggests that developers identify the essential tasks that a user would want to do while mobile. “They need to understand the user and the context,” she added. ?A sample inline action design patternWhat people are sayingReactions to the release of the design patterns have been positive. Debra Lilley, Oracle ACE Director and Fusion User Experience Advocate (FXA), has already demo’ed Fusion Mobile Expenses widely.  Fellow Oracle Ace Director Ronald van Luttikhuizen, called it a “cool demo by @debralilley of the new mobile expenses app.” FXA member Floyd Teter says he is already cooking up some plans for using mobile design patterns.  We hope to see those ideas at Collaborate or ODTUG in 2013. For another perspective on why user experience is such an important focus for mobile applications, check out this video by John King, Director, and Monty Latiolais, President, both from ODTUG, or the Oracle Development Tools User Group.In a separate interview by e-mail, Latiolais wrote: “I enjoy the fact we can take something that, in the past, has been largely subjective, and now apply to it a scientifically proven look and feel. Trusting Oracle’s UX Design Patterns, the presentation really can become one less thing to worry about. As someone with limited ADF experience, that is extremely beneficial.”?King, who was also interviewed by e-mail, wrote: “User Experience is about making the task at hand as easy and error-free as possible. Oracle's UX labs worked hard to make the User Experience in the new Fusion Applications as good as possible; ADF makes adding tested, consistent, user experiences a declarative exercise by leveraging that work. As we move applications onto mobile platforms, user experience is the driving factor. Customers are "spoiled" by a bevy of fantastic applications, and ours cannot disappoint them. Creating applications that enable users to quickly and effectively accomplish whatever task is at hand takes thought and practice. Developers must become ’power users’ and then create applications that they and their users will love.”

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  • SAP acquires Sybase

    - by ashutossh.pewekar
    The news of the Sybase acquisition broke yesterday. The questions that immediately come to mind is " Why?" and "Isnt this too expensive ?" One out-of-the-box explanation for this marriage is simply " History repeats itself" It is more than a decade now that another German company acquired an American industry laggard. I am speaking of the Daimler-Chysler merger. It took a decade for the results of that partnership to unfold. Do things move faster in the IT industry? We will wait and watch.

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  • Getting into C# and MVC4 coming from Javascript

    - by Stefan V.
    Let me know if this is the wrong place to ask this but, I am trying to get into a backend/server language coming from a front-end javascript background (vanilla, angular, jQuery and a bit of node and mongodb, also some experience with PHP and MySQL). Why C#? My company's entire server-side is MVC4. Occasionally, I am going through commits of the backend guys and have asked them all sorts of questions. A lot of what I have heard and seen just seems appealing. Anyway, I'd rather start with C# first and gradually adopt .NET MVC. Does anybody advice, tips, recommended books, etc for somebody trying to learn C# coming from a JS background?

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  • Designing a "Grid" like object that contains game objects

    - by liortal
    I am working on a 2D game, where there's a game "board" on which other game objects are placed. This this is 2D, my starting point was to design a class that will internally use a 2d array for the actual stored game objects. This class could be simply accessed by 2 indices: (i, j) to get game objects on it. My problem is that i have no idea how to make the game "board" "propagate" its data onto its children. Design questions i ran into are: Should the children placed on the board have display properties such as size, screen position? Should the board itself dictate this information? How to update children in case the board changes some of its properties? (position, etc). Should the board be aware of the types of objects stored in it ? I have no idea how similar things such as WPF or other UI frameworks go about organizing a "container like" object that can arrange or apply certain UI properties to its children.

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  • PL2303X driver for ubuntu

    - by kam
    I have 2 questions I hope someone is able to help me. I bought a usb/serial adapter based on PL2303X and not PL2303. 1- Do you know of any patches to make the PL2303X detectable and functional? 2- Assuming I got the patch, and before I apply it, I wanted to upgrade my kernel. I found this website http://www.unixmen.com/upgrade-your-kernel-the-safe-way-in-ubuntu-linuxmint/ to teach me to do so.. Is this a good procedure? and to what version you advise me to upgrade? Thanks.

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  • Dropbox indicator icon dissapears right after login

    - by garvamel
    Even though Dropbox's app indicator dissapearing from the tray area seems like a recurrent enough problem, my issue is a litte different. When I login, I can see the app panel populating, and the dropbox icon does indeed appear (config'd as startup application), but after some other icons show up (bluetooth, battery, etc.) it's gone. It's still running though. I'm guessing it's having issues with staying pinned, and I don't know how to start addressing this problem. I have tried many if not all solutions provided here in the forums for the "icon missing" questions. So far: I've whitelisted everything regarding panel Uninstalled-reinstalled (with and without rebooting in between) Overwritten current installation Purged installation from terminal Installed from Software Center and from .deb file batch deleted every "dropbox" ocurrences from terminal (files and folders) and reinstalled Ran sudo apt-get install libappindicator1, it installed, but didn't solve anything I'm on Ubuntu 12.04 LTS - 64 bits. Any insight would me much appreciated!

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  • No boot loader found - dual booting Windows 8 with Ubuntu 14.04

    - by Sriram
    I have been trying in vain to dual boot my computer with Windows 8 Pro (pre-installed) and Ubuntu 14.04 64-bit. I have been able to successfully install Ubuntu 14.04, but the option to start Ubuntu does not appear on startup. This is after having taken all steps as mentioned in Installing Ubuntu on a Pre-Installed Windows 8 (64-bit) System (UEFI Supported). I even tried the boot repair option and ended up with this error log. My questions are: How do I solve for No boot loaders found in /dev/...? Are there any other recommendations that will help me solve this? Other points that may be important: Booting into Ubuntu from a live USB shows all Ubuntu partitions on the hard drive.

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  • Setting APPMENU_DISPLAY_BOTH for gnome applications does not work on Ubuntu 12.04 LTS

    - by Jack'
    To start the application with the menu enabled in the application and the panel, the following command has to be used: APPMENU_DISPLAY_BOTH=1 appname I recently discovered that this only works for non-gnome applications on Ubuntu 12.04 LTS, i.e. if you replace appname with applications such as gnome-terminal, gedit, evince, empathy, evolution, rhythmbox, nautilus, etc. only global menus will be displayed. However, if you start, for example, gimp or inkscape by using APPMENU_DISPLAY_BOTH, both global and local menus will be shown. The questions is: why is APPMENU_DISPLAY_BOTH not taken into account when starting such gnome applications? P.S. I know how to disable global menus in order to get the local ones (UBUNTU_MENUPROXY trick, removing appmenu-gtk/qt packages, removing the indicator-appmenu, etc.) Thanks for the help!

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  • Does Ubuntu run well on an USB HDD?

    - by Klaus
    I have here a company notebook, and because the HDD is full encrypted, I cannot install an extra partition for another system that I would like to use in my free time. And I really need another system, because this crap Windows here with that much of anti-virus, anti-spyware, anti-whatever on it is so slow and annoying. What can I do? I could use an external USB HDD with another system. Because I would like to handle big files and so on, I don't want to use a USB stick. A USB 2.5 HDD + Ubuntu is what I think the best option. Here are my questions: Do I have to note something? Does Ubuntu run well on an external HDD? Do I have big performance problems (because of the USB HDD)? Should I buy a very fast HDD for much money or it is not that important? Any suggestions?

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  • Unable to access the server via SSH?

    - by Rishee
    when I am trying to access the server through ssh it says: ssh: connect to host xx.yyy.zzz.x port 22: Connection refused and on the server in auth.log it shows following log entry: Address xx.yyy.zzz.x maps to xx.yyy.zzz.x.static-pune-vsnl.net.in, but this does not map back to the address - POSSIBLE BREAK-IN ATTEMPT! I have created a user account for that user and it is also in enabled status. Requested info It is Ubuntu 11.10 It is configured as SSH Server using openssh-server I am trying to connect to this server using Putty from Windows 7 i.e. My Desktop I have also asked this in superuser as per the request of @zpletan and link to that question is given below. http://superuser.com/questions/408080/unable-to-access-the-server-via-ssh Thanks in advance.

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  • Design documents as part of Agile

    - by syrion
    At my workplace, we face a challenge in that "agile" too often has meant "vague requirements, bad acceptance criteria, good luck!" We're trying to address that, as a general improvement effort. So, as part of that, I am proposing that we generate design documents that, above and beyond the user story level, accurately reflect the outcome of preliminary investigations of the effect of a given feature within the system and including answers to questions that we have asked the business. Is there an effective standard for this? We currently face a situation where a new feature may impact multiple areas in our "big ball of mud" system, and estimates are starting to climb due to this technical debt. Hopefully more thoughtful design processes can help.

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  • Does C# give you "less rope to hang yourself" than C++?

    - by user115232
    Joel Spolsky characterized C++ as "enough rope to hang yourself". Actually, he was summarizing "Effective C++" by Scott Meyers: It's a book that basically says, C++ is enough rope to hang yourself, and then a couple of extra miles of rope, and then a couple of suicide pills that are disguised as M&Ms... I don't have a copy of the book, but there are indications that much of the book relates to pitfalls of managing memory which seem like would be rendered moot in C# because the runtime manages those issues for you. Here are my questions: Does C# avoid pitfalls that are avoided in C++ only by careful programming? If so, to what degree and how are they avoided? Are there new, different pitfalls in C# that a new C# programmer should be aware of? If so, why couldn't they be avoided by the design of C#?

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  • How to work with scenes in a 2D game

    - by Anearion
    I'm a java/android programmer, but I don't have any experience in game programming, I'm already reading proper books, like "Pro Android Games", but my concerns are more about the ideas behind game programming than the techniques themselves. I'm working on a 2D game, something like Cluedo to let you understand the genre. I would like to know how should I act with the "scenes", for example, a room with a desk, TV, windows and a lamp. I need to make some items tappable and others not. Is it common to use one image (invisible to the user) with every different item a different color, then call the getColor() method on the image? Or use one image as background, and separate images for all the items? If the latter, how can I set the positioning? and should I use imageView or imageButton? I'm sorry if those are really low quality questions, but as "outsider" ( I'm 23 and still finishing my university ) it's pretty hard learn alone.

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