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  • What are the downsides of implementing a singleton with Java's enum?

    - by irreputable
    Traditionally, a singleton is usually implemented as public class Foo1 { private static final Foo1 INSTANCE = new Foo1(); public static Foo1 getInstance(){ return INSTANCE; } private Foo1(){} public void doo(){ ... } } With Java's enum, we can implement a singleton as public enum Foo2 { INSTANCE; public void doo(){ ... } } As awesome as the 2nd version is, are there any downsides to it? (I gave it some thoughts and I'll answer my own question; hopefully you have better answers)

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  • I'm getting unrelated system messages in terminal?

    - by Zed
    For some reason from time to time I keep getting this weird system messages in my working terminal emulator, unrelated to anything I do.For example: [000:000] Browser XEmbed support present: 1 [000:000] Browser toolkit is Gtk2. [000:001] Using Gtk2 toolkit [000:033] Starting client channel. [000:048] Read port file, port=33359 [000:050] Initiated connection to GoogleTalkPlugin [000:154] Socket connection established [000:154] ScheduleOnlineCheck: Online check in 5000ms [000:203] Got cookie response, socket is authorized [000:203] AUTHORIZED; socket handshake complete [005:216] HandleOnlineCheck: Starting check [005:216] HandleOnlineCheck: OK; current state: 3 Failed to open VDPAU backend libvdpau_nvidia.so: cannot open shared object file: No such file or directory After some investigation I concluded that those messages ARE from firefox.However, I didn't start Firefox from terminal. or nsBuiltinDecoderStateMachine::RunStateMachine queuing nsBuiltinDecoder::PlaybackEnded nsBuiltinDecoder::PlaybackEnded mPlayState=3 nsBuiltinDecoderStateMachine::RunStateMachine queuing nsBuiltinDecoder::PlaybackEnded nsBuiltinDecoder::PlaybackEnded mPlayState=3 I have no clue how this ends up in working terminal, any thoughts ?

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  • Installing old Loki games on 12.04 64-bit results in no audio

    - by FlabbergastedPickle
    All, Here's an interesting problem. I followed instructions provided online for installing Loki Games' Heroes of Might and Magic 3 (see http://www.swanson.ukfsn.org/loki/ and http://wtanaka.com/node/7641) and got it installed and patched to the latest version. However, every time I start it regardless whether the pulseaudio is running, I get the following error: LD_LIBRARY_PATH=/usr/local/lib/Loki_Compat/ /usr/local/lib/Loki_Compat/ld-linux.so.2 /usr/local/games/Heroes3/heroes3.dynamic ALSA lib conf.c:3314:(snd_config_hooks_call) Cannot open shared library libasound_module_conf_pulse.so ALSA lib pcm.c:2217:(snd_pcm_open_noupdate) Unknown PCM default Couldn't open audio: My first soundcard is HDMI output and my second one is the actual soundcard (HP DM1 running 12.04 64-bit with latest updates). I did set up /etc/asound.conf as follows: asound.conf pcm.!default { type hw card 1 } ctl.!default { type hw card 1 } So, the default soundcard should work ok. Between Shadowgrounds that also stopped working and this it appears a there may be some unfinished business/regressions in 32-bit support on 64-bit systems in 12.04. Any thoughts?

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  • Android - Rendering HUD View to SurfaceView

    - by Jon
    I have developed a relatively simple game in android, to get my head around it all, and on the back of it developed a crude game engine (in the loosest sense!). I use a SurfaceView and canvas (no OpenGL) - I'll cross that bridge another time! I have implemented a game HUD, title screens etc. by overlaying standard Android view widgets over my SurfaceView. This all works reasonably well maintaining an acceptable frame-rate, but it is a simple game with not a lot happening on or off screen. What I am wondering now is whether one could (and whether one would get any advantage by) drawing all my views to the one SurfaceView, all controlled by the main game thread. At the moment I have handlers flinging messages around and runOnUiThreads here, there and everywhere. Quite cumbersome. Any thoughts on this would be much appreciated (before I perhaps waste time trying to do it!)

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  • You made it through the Interview, Now What?

    - by Jonathan Kehayias
    This is somewhat of a continuation post to my previous blog post, “Some thoughts on Interviweing…” .  Now that you survived the interview process, what do you do?  This is a common area of discomfort for people interviewing for  any kind of job, not just positions dealing with SQL Server.  In this post I’d like to focus on a topic that I like to refer to as “Post Interview Etiquette” and how it might impact your ability to get hired for a position.  Whether or not to follow-up...(read more)

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  • Best Game Engine/Framework and Language for 2D actor/sprite intensive game

    - by Grungetastic
    I'm new to the game dev world. I have a rather large project in mind (I learn by setting myself challenges :P ) and I'm wondering what the best engine/framework/language is for a 2D game with thousands of sprites/actors on screen at a time. Bare metal type stuff. I need to still be able to zoom in and out with that many actors at once. This game will have no 3D elements. Any thoughts? Suggestions?

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  • Prefer algorithms to hand-written loops?

    - by FredOverflow
    Which of the following to you find more readable? The hand-written loop: for (std::vector<Foo>::const_iterator it = vec.begin(); it != vec.end(); ++it) { bar.process(*it); } Or the algorithm invocation: #include <algorithm> #include <functional> std::for_each(vec.begin(), vec.end(), std::bind1st(std::mem_fun_ref(&Bar::process), bar)); I wonder if std::for_each is really worth it, given such a simple example already requires so much code. What are your thoughts on this matter?

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  • OpenOffice Calc doesn't show up in the alt-tab window switcher

    - by Abe
    I just upgraded to ubuntu 12.04, and it's mostly working. My biggest problem so far: OpenOffice/LibreOffice Calc doesn't show up under the task switcher. When I pres alt-tab to change windows, I can see all my windows except for any OpenOffice documents I have open. If I minimize other windows, then I can get to my Calc documents, but Alt-Tab just doesn't work. It only seems to be a problem with Calc. Writer and Impress both work fine. I do a lot of work in spreadsheets, so this is really messing up my flow. Any thoughts on how to fix it?

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  • Using table-styled divs instead of tables

    - by mister martin
    I was referred here from stackoverflow as my question was apparently too broad. I'm working on a template, and I know using CSS is preferred over HTML tables for positioning... But, is it acceptable to get the best of both worlds and use table-like styles on my divs? For example: display: table; This not only helps solve the sticky footer problem, but it also avoids the pains associated with using floats. Somehow it feels dirty, but I can't logically explain why because it works without any "tricks" or ugly hacks, which is how it should be, right? Is this technically incorrect, or does it ultimately boil down to just a matter of opinion? ...Thoughts?

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  • why would Remmina stop working?

    - by Chris Curvey
    Until sometime last night, I had remmina working fine. I could run RDP through an SSH tunnel and all was well. Then it stopped working. I can get as far as the password dialog for my work machine, but then it just says "Cannot connect to RDP server localhost". I can't even find any logs that look interesting. I've re-installed remmina, cleared my .remmina directory, restarted my machine, and even restarted my gateway. Just to make it really weird, my laptop (which has the same setup -- latest Ubuntu and Remmina) can make the connection just fine. It is even going through the same router, albeit wirelessly. Any thoughts?

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  • Hiring Developers - Any tips on being more efficient?

    - by DotnetDude
    I represent a software company that is in process of building a large software development team. We are picky in who we hire and have really good retention rate (most of the devs have been here for an average of 5-6 years). We've been spending a lot of developers' and HR time and have a low applications to hire ratio. Here's the process we use: HR Interview on phone - Involves asking basic behaviorial and tech questions Online test - Involves a 30 minute technical test Technical Phone interview - A 60 minute interview by a developer Onsite Interview - A 60-90 minute interview by several senior developers Although this process has been working, we've been spending way too much time on interviews. Any thoughts on how this can be done differently? Our goal is to automate any tasks if possible still retaining the quality of talent.

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  • Using automated bdd-gui-tests to keep user-documentation-screenshots up do date?

    - by k3b
    Are there developpers out there, who (ab)use the CaptureScreenshot() function of their automated gui-tests to also create uptodate-screenshots for the userdocumentation? Background: Whithin the lifetime of an application, its gui-elements are constantly changing. It makes a lot of work to keep the userdocumentation uptodate, especially if the example data in the pictures should match the textual description. If you already have automated bdd-gui-tests why not let them take screenshots at certain points? I am currently playing with webapps in dotnet+specflow+selenium, but this topic also applies to other bdd-engines (JRuby-Cucumber, mspec, rspec, ...) and gui-test-Frameworks (WaitN, WaitR, MsWhite, ....) Any experience, thoughts or url-links to this topic would be helpfull. How is the cost/benefit relation? Is it worth the efford? What are the Drawbacks? See also: Is it practical to retroactively write specifications documenting a system via automated acceptance tests?

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  • Java web UI framework like ASP.NET MVC?

    - by Ethel Evans
    I'm doing some web apps for personal projects that might be shared out with my friends. I'm trying to use skills that will help me at work, but don't have $$ to spend on Visual Studio right now and don't want to try to cobble something together with Express Editions. Since I've been sort of wanting to bring my Java skills up to date and the main skills I want to work on are design and architecture skills, this isn't a big deal - except that I have no idea how to track down the right UI framework. I know I want something based on MVC, to get more practice with frameworks for that design pattern (we're using ASP .NET MVC2 at work). The UIs that I'll be making will be pretty simple - data entry, buttons, text, images. They will need AJAX. Any thoughts about which frameworks to look at? I'll be watching the comments, if anyone wants additional clarification on what I'm looking for.

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  • should i take Exam 70-515 or should i wait for Exam 70-480 ? [closed]

    - by Filip
    As it states on Microsoft site exam 70-515 is scheduled to retire July 31, 2013. His successor is suppose to be exam 70-480 in my understanding. I know most of the stuff in exam 70-515 but it will take me like one mount to read the book from Microsoft Press Resource Center and get ready for the exam, also i will be paying for the exam not the company i work for. So i think it is better to start reading books and forums that concentrate on how and for what will be exam 70-480 then paying for something that will not be valued for ~ 1 year from now. Whats your thoughts/suggestions ?

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  • Rendering oily/polluted water?

    - by Fraser
    Any shader wizards out there have an idea of how to achieve an oily/polluted water effect, similar to this: Ideally, the water would not be uniformly oily, but instead the oil could be generated from some source (such as a polluting drain from a chemical plant) and then diffuse throughout the water body. My thought for this part would be to keep an "oil map" as a 2D texture that determines the density of oil at each point on the water surface. It would diffuse and move naturally with the water vel;ocity at that point (I have a wave-particle simulation for dynamic waves, and am already doing something similar for foam on the water surface). However, I'm not sure how physically correct that would be, since oil might not move at the same velocity as the water. And I have no idea how to make all those trippy colors :-). Thoughts?

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  • Which Shopping Cart is better to run online grocery shop Prestrashop or nopCommerce

    - by Bigmunk
    I have been researching on open source software for an online grocery shop project. I have now narrowed by search to .NET based nopCommerce and the PHP based PrestaShop shopping carts. My plan is to acquire an open source shopping cart and hire a local developer to customize it to our local needs & as per our requirement. I'm now wondering whether I should have a developer start the whole project from scratch, or use an open source software such us PrestaShop or nopCommerce which can then be customized? Note that my store will have thousands of products and services so I want something that can handle up to 5000 products and over. Thanks for your thoughts and advice in advance.

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  • Examples and Best Practices for Seeding Defects?

    - by MathAttack
    Defect Seeding seems to be one of the few ways a development organization can tell how thorough an independent testing group is. I'm a fan of using metrics to help counter overconfidence biases, and drive discussions around facts. With that said, I haven't seen Seeding Defects used in practice. Are there best practices above and beyond what McConnell explained? Are there public examples where this has been done? In the absence of the above, any thoughts on why it hasn't been done more? Thanks in advance!

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  • Ubuntu Server 12.04 Screen Resolution "Out of Range"

    - by Alastair Mackie
    I'm fairly new to ubuntu and have just installed Ubuntu Server 12.04 on a spare machine to experiment and play with! The installation went without problem, however whenever the OS boots the monitor displays a an error message saying the resolution is "out of range" and i can't see to do anything - i can wait as long as i like, but nothing appears. Ubuntu is the only OS installed so bypasses GRUB on boot, although the GRUB screen is also out of range if forced on startup. I can access a shell from the recover mode and i can get at a terminal through a LiveCD of the Desktop version but have had little luck with either. I've been trying to figure this out for days and i'm at a total loss. Any thoughts?

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  • Multiple Vertex Buffers per Mesh

    - by Daniel
    I've run into the situation where the size of my mesh with all its vertices and indices, is larger than the (optimal) vertex buffer object upper limit (~8MB). I was wondering if I can sub-divide the mesh across multiple vertex buffers, and somehow retain validity of the indices. Ie a triangle with a indice at the first vertex, and an indice at the last (ie in seperate VBOs). All the while maintaining this within Vertex Array Objects. My thoughts are, save myself the hassle, and for meshes (messes :P) such as this, just use the necessary size ( 8MB); which is what I do at the moment. But ideally my buffer manager (wip) at the moment is using optimal sizes; I may just have to make a special case then... Any ideas? If necessary, a simple C++ code example is appreciated. Note: I have also cross-posted this on stackoverflow, as I was not sure as to which it would be more suitable (its partly a design question).

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  • md5deep error with after compression and extraction

    - by Sai
    I am using md5deep to generate the checksum for the contents of an entire directory. After generation, if I use the checksum file and run a check, there are no errors. However, if I compress the file and extract it, it seems to generate an error about a missing file. The file is just called .md5. There is no file called .md5 inside the directory. It seems to create a file that is not existent. This problem exists when I use md5sum or md5deep. Any thoughts on why this is happening?

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  • Dotted subdomain name or new domain?

    - by Catalin Ilinca
    I have a company website hosted at www.BRAND.com (where BRAND is a generic name). The company want to develop a "micro website" for one of their campaigns, named "Inspired By BRAND". I have two directions: inspired.by.BRAND.com - which I personally don't like too much. I don't know why but I don't recall any web address similar to this one subdomain.subdomain.domain.com. inspired.BRAND.com - which I this is best suited for it. Fewer dots and similar to "more friendly" addresses subdomain.domain.com. Any hints, guidelines, any thoughts is well appreciated. Thanks in advance

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  • The Silverlight Group's First Blog Post

    - by TheSilverlightGroup
    Welcome to The Silverlight Group's first blog post! First of all, we just want to introduce ourselves. The Silverlight Group is a new Microsoft vendor company whose primary officers are David Silverlight himself as Chief Software Architect & Kim Schmidt as "Connection String", a form of CEO. So, for a simple introduction, there you have it We will be updating this blog on a regular basis, so please visit us often & share your thoughts with us, as we will with you. Thanks for visiting us while we get set up!

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  • Multithreading synchronization interview question: Find n words given m threads

    - by rplusg
    I came across this question: You are given a paragraph , which contain n number of words, you are given m threads. What you need to do is , each thread should print one word and give the control to next thread, this way each thread will keep on printing one word , in case last thread come, it should invoke the first thread. Printing will repeat until all the words are printed in paragraph. Finally all threads should exit gracefully. What kind of synchronization will use? I strongly feel we cannot take any advantage of threads here but interviewer is trying to understand my synchronization skills? No need of code, just put some thoughts. I will implement by myself.

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  • Got an idea for an application, but part of it is patented, any suggestions?

    - by tekiegreg
    so I've been working on developing an idea for an application that I think has the potential to be successful, however after some initial research I've discovered that at least part of my ideas are covered by a patent out there, the patent in particular is held by a really large company (I don't want to give away specifics for fear I'd draw their attention for sure). I'm debating a few options: 1) Develop patents around my ideas that don't conflict and maybe approach the company in question for a license exchange 2) Just approach them for a license outright 3) Just develop around it anyways and hope for the best :-p What have other people done in these situations? Are companies generally willing to grant patent licenses? Are they willing to grant them at reasonable prices? Thoughts?

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  • Trying to figure out SDL pixel manipulation?

    - by NoobScratcher
    Hello so I've found code that plots a pixel in an SDL Screen Surface : void putpixels(int x, int y, int color) { unsigned int *ptr = (unsigned int*)Screen->pixels; int lineoffset = y * (Screen->pitch / 4 ); ptr[lineoffset + x ] = color; } But I have no idea what its actually doing here this is my thoughts. You make an unsigned integer to hold the unsigned int version of pixels then you make another integer to hold the line offset and it equals to multiply by pitch which is then divided by 4 ... Now why am I dividing it by 4 and what is the pitch and why do I multiply it?? Why must I change the lineoffset and add it to the x value then equal it to colors? I'm soo confused.. ;/ I found this function here - http://sol.gfxile.net/gp/ch02.html

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