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  • What kind of performance issues does multiple instances of the exact same object have on a game?

    - by lggmonclar
    I'm fairly new to programming, and I've pretty much learned all the things I know on the go, while working on projects. The problem is that there some things that I just don't know where to begin searching. My question is about performance, and how can multiple instances of the same object affect it -- Specifically, I'm talking about XNA's "GraphicsDevice" class. I have it instanced on four different parts of my game, and in three of those, the object has the exact same values for all the attributes. So, in that case, should I be using the same instance of GraphicsDevice, passing it as a parameter, even if I use it in different classes? I apologize if the question seems redundant, but like I said, I've taught myself most of what I know, so there are quite a few "holes" in my learning process.

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  • How can I make my generic comparer (IComparer) handle nulls? [closed]

    - by Nick G
    Hi, I'm trying to write a generic object comparer for sorting, but I have noticed it does not handle the instance where one of the values it's comparing is null. When an object is null, I want it to treat it the same as the empty string. I've tried setting the null values to String.Empty but then I get an error of "Object must be of type String" when calling CompareTo() on it. public int Compare(T x, T y) { PropertyInfo propertyInfo = typeof(T).GetProperty(sortExpression); IComparable obj1 = (IComparable)propertyInfo.GetValue(x, null); IComparable obj2 = (IComparable)propertyInfo.GetValue(y, null); if (obj1 == null) obj1 = String.Empty; // This doesn't work! if (obj2 == null) obj2 = String.Empty; // This doesn't work! if (SortDirection == SortDirection.Ascending) return obj1.CompareTo(obj2); else return obj2.CompareTo(obj1); } I'm pretty stuck with this now! Any help would be appreciated.

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  • Is a blob more efficient than a varchar for data that can be ANY size?

    - by BillyNair
    When setting up a database I want to use the most efficient data type for potentially fairly long data. Currently my project is to store song titles and thoughts pertaining to that song. Some titles might be 5 characters or longer than 100 characters and the thoughts could run pretty long. Is it more efficient to use a varchar set to 8000 or to use a blob? Is using a blob the same as a varchar, in that there is a set size it is allocated regardless of what it holds? or is it just a pointer and it doesn't really use much space on the table? Is there a certain set size of a blob in KB or is it expandable?

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  • Dual monitor not working after an update

    - by Nimonika
    I did a package manager update yesterday and it turns out that my dual monitor setup has stopped working. I have poor vision so I really need to connect to a much bigger screen, but since yesterday, when I connect the screen to my laptop, the screen does not automatically reset itself to the laptop display. Even after lots of trial and error with the display settings, I am getting different dispalys on the laptop and external screen and right now only the big screen is active while the laptop has blanked out. Please can someone help me setup my dual screens for 11.10 properly. lspci -v | grep -i vga output 00:02.0 VGA compatible controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 07) (prog-if 00 [VGA controller]

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  • Ubuntu 12.04 x64 - Very slow response and sluggishness

    - by Murphy1138
    Recently updated to 12.04 x64 on my AMD HEX core 4GB system, over the last few days I feel that the overall system is sluggish/laggy , for instance hitting the dash button, the dash opens but the recent activity of files/videos etc is incredibly slow to populate, like wise in Nautilus and browsing my media, the file names are showing up but it takes an age to populate the "thumb" of the video, If I go into Gnome-shell the shell response is a little faster but again clicking on applications there is still a noticeable pause. I have the latest Nvidia Drivers loaded and I have very fast SATA drives, if I reboot into windows 7 the system is so much quicker in its response, I only use windows for games and Ubuntu is my main OS. 10.04/10.10/11.04 was Super quick and this was when the system still had a Duel Core Chip and a worse Nvidia card, 11.10 was pretty snappy, but 12.04 just feels bloated on each system I have installed it on. My hardware is more than up to the task so has anyone got any commands i can run to help diagnose the issue? Anyone else got the same problems? Thanks Murph

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  • OpenGL Beginner question

    - by nobby
    I'm new to OpenGL programming, but I can't find a good book to read or a tutorial, I've tried reading through the superbible or whatever its name is but it's kind of complicated to me. The tutorial at http://duriansoftware.com/joe/An-intro-to-modern-OpenGL.-Chapter-2.3:-Rendering.html is pretty ok but it doesn't cover what I need mostly, which is opengl math etc (such as projection matrix, view matrix, and so on). I'm fairly OK at C(++) (3+ years experience, I don't know if you would call that "good") What i basically want to do with OpenGL is, make a simple game (prefer 2D as a start and not 3D). Please suggest a good EBook to read and learn from.

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  • What things need to be considered when redeveloping the whole UI for a web app?

    - by Robin
    I am the lead developer on a thick client web app (Java swing) which we're looking at recreating as a web app. We're part way through some initial work, have chosen a framework on the server and integrated with our previous backend code. We're just starting to get into the client side of things, looking at javascript frameworks etc. The previous system was pretty sensibly architected so the logic is already serverside. The challenge ahead of us is really about redeveloping the user interface rather than anything else. What would be the list of things to consider in redeveloping the entire user interface for any application? I'm trying to get an idea of how large a task might still be ahead of me and the team.

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  • Is there a way to specify a CSS3 transition to occur only on :hover and when returning from hover, not on every event? [closed]

    - by Steve
    You could define the transition on the :hover event, which causes the browser to render only the effect into the hover and not out of it. a:hover { transition... } Using scale as an example, an image being scaled up would scale up on hover, but go straight back down without any transition when the cursor leaves the image. Or, you can set the transition on the element directly: a { transition... } Which by definition means any change that effects the scale of the element such as any developer set styles will work, but also the user zooming in and out the page, will cause there to be a transition. All the tutorials being spewed onto the internet at the moment point to using the latter, but wouldn't one consider this a usability flaw for anyone wanting to resize the page or taking any other action that may cause similar scenarios? Pages with large amounts of transitional hover scaling can go pretty mental if you zoom in and out of them.

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  • How to compete in a Saturated Niche? [closed]

    - by jasondavis
    Possible Duplicate: Does the position of the content in the source make a difference to SEO? When entering a hugely over saturated niche such as web-design, is it even possible to compete with the big sites that have been ranked on google's #1 page for years? Also, I have read about how important titles, link anchors, and headings are for SEO and how content is the most important. So let's say we are building a standard header, body, sidebar, footer page. In the the actual markup, would it be better to make sure the main content comes before the sidebar on the page or does this probably not make a difference?

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  • Are session aware Models a bad thing?

    - by kevtufc
    I'm thinking specifically in Rails here, but I suspect this is a wider question. In a Rails web application I'm using data from the session in models in order that the models know who is logged in. I use this in a method which filters out some data from the database depending on a very simple permissions system. The thing is: using sessions in models in Rails requires a bit of a workaround. It works, but I've a feeling that it's something that I shouldn't be doing and I'm worried there's a big gotcha I'm missing. I suppose the Right Thing To Do would be to return all the data and filter out the not-wanted bits in the controller before passing that to the view, but doing it in the model seems to avoid quite a bit of code duplication and so feels "cleaner." Can anyone tell me why or shouldn't do this? Or that it's not a problem?

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  • Super slow and laggy?

    - by Mystogan
    I'm a native Windows user, running 7 Home Premium atm. In the past I installed Ubuntu 10 on my netbook I believe, but was a bit 'scared' by it. Anyways, I made a partition on my desktop pc, 100gb and installed Ubuntu 12.10 on it. It was pretty slow first thought it had to install updates or something, so I rebooted it. Now after the login it looks like everything freezes, I can move my mouse only ,but that's it! I can see my desktop and launcher, but the task bar doesn't display time and misc system info, only a black bar, I downloaded the android SDK pack and installed vlc media player before I rebooted. My computer info: - 1tb HDD - 8gb ddr3 ram - ATI Radeon 4890 videocard (1gb) - AMD Phenom 2 x4 black 3,2ghz CPU(64 bits) Thanks in advantage!

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  • Ubuntu not picking up wireless networks [Ubuntu 12.10]

    - by user114772
    i am new to Ubuntu & just installed it on my DELL mini laptop, when i open the network tab it does not show the wireless networks around me, neither does it show mine, i have enabled networking but it still does not pick up any wireless. I am pretty sure my wireless network is not hidden, since i can connect to it on my other laptop, anyone have any idead on what i could be? It worked once when i was running Ubuntu on my USB, but when i installed it to the hard drive as a main OS it did not list any wireless networks.

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  • IBM, numéro 1 des dépôts de brevets pour la 18eme année consécutive avec un record de 5.896 brevets, Microsoft dans le top 3

    IBM, numéro 1 des dépôts de brevets pour la 18eme année consécutive Avec un record de 5 896 brevets, Samsung et Microsoft dans le top 3 IBM est une fois de plus le numéro 1 dans le classement annuel des entreprises ayant déposé le plus de brevets au cours de l'année 2010. Les chercheurs de la firme ont réalisé un record avec un dépôt de 5 896 brevets au cours de l'année 2010, soit une augmentation de 10 % par rapport à l'année précédente. Ce chiffre fait de « Big Blue » la première ayant déposé plus de 5000 brevets au cours d'une année. C'est la 18eme année consécutive qu'IBM occupe cette place de numéro 1. Ces brevets touchent des domaines très variés. La fi...

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  • using ubuntu command line to replace text in huge file

    - by user299331
    hi i have a huge xml file that i must work with. right now the file is only 1 line that contains about 2 million characters which represent 30,000 records. there are no carriage returns or linefeeds whatsoever. what i need to do is make each record on its own line. new records begin with "" and end with "". i've been looking around here and it seems the tools to use are: sed, tr or awk but i'm not sure which is most appropriate. i've tried this to no avail: tr '<ROW' '\012 <ROW' <source.xml |tee destination.xml above seems to output some pretty weird stuff so i must be way off here. maybe its that "<" character that is the problem?

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  • Are there any conceptual drawbacks to building a web app with C++ and MySQL?

    - by jnthnclrk
    I've inherited a pretty interesting project where there is a good opportunity to take an existing piece of software and turn it into a SaaS web app. As the project is inherited, the code base/ framework is already defined as C++ and MySQL. The app itself is compiled and run as an EXE on Windows Server. The UI is web based and the app works as a kind of server. From what I do know of modern web apps, this is perhaps an unusual choice. These days, most people seem to opt for a PHP framework or Ruby on Rails. Certainly that is the impression I get from reading blogs on the subject. So, I'm very interested to know if a C++ EXE backed by MySQL is a solid foundation for a web app, or whether we should be looking to build in another way?

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  • cannot unlock login screen 14.04

    - by LittleNooby
    When my computer boots, entering the correct password won't start my session. I found out the problem is /home/user/.Xauthority ownership. root owns this folder and giving the ownership to the user will solve the problem... for a while. I don't know how or when, but the ownership will go back to root pretty often; It can happen just after one boot or ten. Is there a definitive solution to this problem?

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  • SimpleViewer + lightbox

    - by singles
    Is it possible to integrate any kind of Lightbox with SimpleViewer? But I don't want to display SimpleViewer in Lightbox. I want to Lightbox show when I click on one of the images in SimpleViewer. Does anyone tried that with success? EDIT I have a SimpleViewer page now. I just want to bind handler to clicking an image (as normally in HTML based pages), fetch big image url and show that image (not SimpleViewer!) in Ligthbox/ThickBox/FancyBox etc.

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  • which status to put for temporarily inactive page

    - by aji
    I was wondering if someone could help me how to manage temporarily inactive website in regards of SEO and search engine. the case is i managed a big ecommerce site, and sometime i need to put down page(s). could be days, could be weeks, could be months, and it depends on our vendor. if my visitors land on the page that been temporarily inactive then i can give them a message that the vendor they looking for is not available at this time and he can check back later OR check another vendor with similar products, but how do i send my message to search engine robots? if i use 301 status and forward URL page to another similar products, then the chance that the current URL being deindex is huge while i still want to use that URL for the future if my vendor want to re-join. any advise will highly appriciated

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  • Is the Apple iPad for you now or should you wait until the iPhone 4 is released?

    The iPad came to the market last Saturday and as always with the Apple marketing came the big lines and small tents that never seen a camp site but the Apple stores. There are the people that want one right away and want to be the first person to own the new shiny device from Apple and there are the people that are willing to wait a month for the device with 3G instead of just WiFi only. The iPad is an interesting concept, a bigger iTouch that can be used as a replacement for your Netbook, Kindle,...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • How will you make a webdeveloper resume in 2012? [closed]

    - by Napolux
    It's been a while since the last time I updated my resume. Now it's time to give it a refresh, but even if I have a strong experience and I worked recently on many big projects my resume "feels" quite old. Maybe is the format (in Europe we have europass that is a standard) that doesn't fit the work of a developer, I don't know. Or maybe it's only me: it's 2012 and I start thinking that showing a list of projects and a bunch of acronyms in a CV like PHP, HTML, JS, CSS, whatever is quite boring for a recruiter. How is your resume? What is in your opinion the best format (a little website, a PDF showcase of the projects I worked on, just a standard CV, etc...) for a webdeveloper?

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  • Get income on a free app, offline?

    - by user717572
    I have an Android app which I added adMob ads to. They only work tough when the user is online. Now the problem is, the app is specially made for offline use, so pretty much nobody will ever get to see one. The app is free to download, but I would still like to make a few cents out of it. It currently has around 300, which I guess will look at it about twice per workday. Any help on how to make some money with this free, offline app?

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  • Why can't my Wifi cannot connect or disconnect?

    - by tmy1018
    Wifi connection might drop spontaneously or simply cannot connect. Users on Ubuntu 10.04 and 11.04 have reported experiencing the problem. Running dmesg would show: [210749.637705] wlan0: deauthenticating from 00:23:89:48:3b:b0 by local choice (reason=3) [210778.632244] wlan0: deauthenticating from 00:23:89:48:3b:b0 by local choice (reason=3) [210784.456359] wlan0: deauthenticating from 00:23:89:82:75:70 by local choice (reason=3) which is pretty cryptic. I have tried: kill -9 wpa_supplicant, but wpa_supplicant keeps getting restarted each time. Also, some have suggested that this was caused by enabling power management. However, this might not be true, as the problem has presented itself in a situation where power management was disabled.

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  • Is it necessary to memorize codes?

    - by AAA
    I am a new developer, who just got hired at a big company. I don't know how but I guess they are desperate. However, I am well-versed with HTML5/CSS3 though things change and new things are released and I keep up with as much as I can. But this job required me to hand-code Javascript, know Jquery and Ajax. I have been exposed to this a bit but I am not sure if I can hand-code Javascript. My question is, is it necessary to memorize all there is about Javascript or are there a few key things that I should know how to hand-code because looking at javascript code it seems there are lots of lines code! Please point me in the right direction.

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  • Want to learn a new language. Not sure which to pick.

    - by Regravity
    I've been coding in Batch, VBS and AutoIt for AGES, and while its been great and I've made some pretty complex desktop applications in AutoIt, I'd like to advance to something that is more flexible / powerful. I've found that I really love programming desktop applications to solve a wide variety of problems which is what I've been doing with AutoIt. I've done a lot of research on different languages, but I'm torn between a few, namely C++, C# and Python. Can anyone suggest which language I should tackle next? And reasons why I should?

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  • Need Advice: What to program?

    - by newbie
    Good day! Our professor asked us to create a Web-based program using JSP and JDBC. The problem is I don't have any idea what to program. We have 5 days to create the program and I am searching websites like hotel reservation system, library catalogue system, Amazon, etc but I think it is too big for 5 days (and I am just a beginner). Can anyone give me an idea what is suitable project for beginners to start with? (Note: Address Books / ATM Transactions are not allowed). Do you have sample website so I have a reference? Thank you.

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