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  • Is there a way to recover a file that I have deleted but is still open somewhere?

    - by George Edison
    This question is related to How to recover deleted files? but it is slightly different in nature. Suppose I have a file named ~/something open in a text editor. Further suppose that I open a terminal and run the following command while the file is still open in the text editor: rm ~/something This will delete the file. Now suppose that I changed my mind and wanted to get the file back. The file is still open in the text editor, so it hasn't been removed from the disk or filesystem yet. Is there any way to recover it?

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  • How can I get textures on edge of walls like in Super Metroid and Aquaria?

    - by meds
    Games like Super Metroid and Aquaria present the terrain with the other facing parts having rocks and stuff while deeper behind them (i.e. underground) there's different detail or just black. I would like to do something similar using polygons. Terrain is created in my current level as a set of overlapping square boxes. I'm not sure if this rendering method will work such a system for creating terrain but if anyone has ideas I'd love to hear them. Otherwise I'd like to know how I should re-write the terrain rendering system so it actually works to draw terrain in this manner...

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  • Implement Fast Inverse Square Root in Javascript?

    - by BBz
    The Fast Inverse Square Root from Quake III seems to use a floating-point trick. As I understand, floating-point representation can have some different implementations. So is it possible to implement the Fast Inverse Square Root in Javascript? Would it return the same result? float Q_rsqrt(float number) { long i; float x2, y; const float threehalfs = 1.5F; x2 = number * 0.5F; y = number; i = * ( long * ) &y; i = 0x5f3759df - ( i >> 1 ); y = * ( float * ) &i; y = y * ( threehalfs - ( x2 * y * y ) ); return y; }

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  • How do these hotshot developers keep changing their technology base ?

    - by pankajdoharey
    Yesterday I was watching a lynda.com iphone development video and this developer started telling about how he has worked on 17 different languages from the days of mainframes in assembly/Cobol to now on iPhone Objective-C. My question is how do these developers keep shifting to new technology, without fearing the loss of experience they already have about a particular technology. I am trying to shift to Java from PHP and market considers this as non-relevant experience. How do these guys do it without losing the pay and not being considered a fresher in a particular technology.

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  • Unity: Render 2D textures on a 3D object's face

    - by www.Sillitoy.com
    I am not familiar with 3D graphics and I'd like to know what is the right way to render some 2D figures on different points of a wider face of a 3D object. My 3D object is just a cube representing a poker table. I have 2D png for players placeholders and I'd like to render these figures on the 3D object where needed. An alternative solution would be to render the whole face with a big picture containing all the placeholders figures. However it would be a waste of memory and thus less efficient. What do you suggest me?

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  • What are the Crappy Code Games - What are the challenges?

    - by simonsabin
    This is part of a series on the Crappy Code Games The background Who can enter? What are the challenges? What are the prizes? Why should I attend? Tips on how to win What are the challenges? There are 4 games that you can enter. Each one is to test a different aspect of SQL Server. The High Jump: Generate the highest I/O per second The 100 m dash: Cumulative highest number of I/O’s in 60 seconds The SSIS-athon: Load one billion row fact table in the shortest time The Marathon: Generate the highest...(read more)

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  • Good practices in screen states management?

    - by DevilWithin
    I wonder what are the best ways to organize different screens in a game? I am thinking of it like this: Inheriting a base State class, and overriding update and render methods, to handle the current screen. Then, under certain events a StateManager is able to activate another Screen State, and the game screen changes as only the current State is rendered. On the activation of a new screen, effects like fading could be added, and also the same goes for its deactivation. This way a flow of screen could be made. By saying when A ends, B starts, allowing for complex animations etc. Toughts?

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  • atheros wireless ar9285 driver

    - by nikola
    I have been having problems with wireless on Ubuntu 10 and above, Mint 11 and above. The problem is in the driver for the wireless... I can see that there is no driver installed and yet it works but reduced a lot, for example: on windows 7 ultimate 100% on distance of 1 meter (currently running) Mint Cinnamon 15 on same distance 70% when it goes under the 40 % it simply disconnects and than takes a lot of time to connect again I am new to Linux and I don't know anything about programming, yet I love the interface and look of the OS but don't want to reject it for couple of problems. There is, however, a problem with brightness control on laptop, it shows the notification and slider but with no effect The question is: Can somebody explain to me where to download and how to install the ar9285 driver for atheros wireless card laptop acer emachines eme529? or can someone explain this to me only for the LINUX MINT 15 http://www.jrhenkelmann.net/index.php?option=com_content&task=view&id=34 because the synaptic's interface is different than of mint 15 I KNOW this is Ubuntu community but the problems persist in all Linux versions

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  • how to remap Ctrl to Escape if pressed and released on its own

    - by psvm
    I want to remap Control, so that: A. If it is pressed and released with no other key, it acts as Escape. B. If it is pressed & held together with another key, it acts as Control (no change in behavior in this case). I'm aware of How do I remap certain keys?, so I suspect it may be done with xmodmap. But that answer does not explain how to map the modifier keys. I looked into the examples and grammar sections of the xmodmap manpage, but they do not explain that. The answer in Remapping Caps Lock to Control and Escape (not the usual way) mention that it is not possible to do that to CapsLock, since it is a Lock key, but I hope this may be possible to do it with Control which is a mod key. A solution with something different than xmodmap will also be accepted. (I'm running Xmonad in Ubuntu 12.04, so perhaps there is a way to set this up in xmonad.hs?)

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  • Mouse cursor lag after lock screen, 64 bit 12.04

    - by Bill Jones
    Recently I have noticed that when I return to my computer after it has been "locked" for a while, the mouse pointer has significant lag. The cursor position appears to only update a few times a second. Moving the mouse results in the pointer "following" the movement in a jerky kind of way, and then continuing for some fraction of a second after I have stopped using the mouse. Replacing the mouse has no effect. (I have two differently branded and constructed usb optical mice). Plugging either mouse into a different usb port has no effect. Once the problem was resolved by "suspending" the system, and then re-starting it with the power switch, but this does not work every time. So far, the only fool-proof fix is to shut the system down and re-start it (re-boot). I have tried this suggested fix. It had no effect.

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  • ROOT_MISMATCH error after following FAQ directions

    - by Adko
    While using Ubuntu One in 11.04 I am unable to change my account info. When I made the switch to 11.04 I forgot that I already had an Ubuntu One account so, I made a new one. However, upon going through one of my email accounts I found my old Ubuntu One login information. I then attempted to switch the account associated with my desktop to my first email. Now, despite following the directions found at https://wiki.ubuntu.com/UbuntuOne/FAQ/WhatToDoWhenSyncdaemonSaysRootMismatch I continue to get the error "File sync error. (local and server roots are different (ROOT_MISMATCH))". Any help would be appreciated.

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  • ASP.NET RedirectPermanent Method using C# and VB.NET

    301 redirection is essential for the best user experience. If something on your website has been changed or moved to a new permanent location, users will need to be permanently redirected. In addition, search engines can follow this type of redirection, and this redirected-to page will now be the one to rank in Google or other search engines, replacing the old page. There are different ways to implement the RedirectPermanent method. This tutorial will illustrate these common techniques with sample VB.NET or C# code. Creating the Sample ASP.NET 4.0 Website RedirectPermanent is new in ASP.NET 4....

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  • Left and right keys acting crazy on Ubuntu 10.10 Netbook Remix?

    - by Stephanie
    Hi guys, I just installed Ubuntu 10.10 Netbook Remix on my HP Mini 1000. Everything worked fine right up until I tried typing - apparently the left and right arrow keys on my keyboard are uncontrollable. Everything I type ends up looking messed up because the left and right keys keep automatically inserting themselves into everything I type. This also happens when I click on, say, "File" on Firefox. It starts rotating between all the different menu options even though I'm not pressing anything on the keyboard. Does anyone have any idea what's going on? Is this a problem with the keyboard itself?

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  • No wifi using Ubuntu on laptops

    - by Pete G
    I have loaded Ubuntu onto two different laptops and both had the same result...no WiFi. I could access the internet if I plugged into Ethernet port but try as I might, I just could not access WiFi. I even tried Wine to install a Windows based external usb WiFi device but again...nothing. It functioned normally in Windows but with Ubuntu installed....nothing and this was the same whether it installed just Ubuntu or dual booted with Windows. Any suggestions? Thx!

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  • What Are Some Tips For Writing A Large Number of Unit Tests?

    - by joshin4colours
    I've recently been tasked with testing some COM objects of the desktop app I work on. What this means in practice is writing a large number (100) unit tests to test different but related methods and objects. While the unit tests themselves are fairly straight forward (usually one or two Assert()-type checks per test), I'm struggling to figure out the best way to write these tests in a coherent, organized manner. What I have found is that copy and Paste coding should be avoided. It creates more problems than it's worth, and it's even worse than copy-and-paste code in production code because test code has to be more frequently updated and modified. I'm leaning toward trying an OO-approach using but again, the sheer number makes even this approach daunting from an organizational standpoint due to concern with maintenance. It also doesn't help that the tests are currently written in C++, which adds some complexity with memory management issues. Any thoughts or suggestions?

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  • Splitting Logic, Data, Layout and "Hacks"

    - by fjdumont
    Sure, we all heard of programming patterns such as MVVM, MVC and such. But that isn't really what I'm looking into as Layout, Data and Logic is already pretty much split up (XML-Layout markup, Database, insert your language of choice here). The platform I am developing for is hard to maintain over the updated versions and older OSes. The project significantly grew up over the last few months and dealing with different platform versions really is a pain. For example simply disabling an user interface control for all existing versions took me around 40 lines of code in the logic layer, wrangling around with invocation, delegation, singletons that provide UI handling and so on. Is there a clean way to keep track of those "hacks" by maybe excluding it into separate classes or even packages? Should I overwrite existing framework code in order to handle my requirements correctly? If so, does that concept have a name?

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  • Why not sync folders outside home with ubuntu-one?

    - by peer
    It took me a while to find out that with ubuntu-one I can sync only folders in my home-folder. On all other folders the ubuntu-one - option is available in preferences, but the actual actions are greyed out. The ubuntu-faq is quite clear on that: https://wiki.ubuntu.com/UbuntuOne/FAQ/CanISyncAFolderOutsideMyHomeFolder But I actually wonder why and if this is going to change and if there is a trick around it (an other one than setting my home to /) I personally dont have any important data in my home-folder other than the program-configs. All documents, pictures, music are on a folder called /data that is actually on a different partition. That makes it much easier when one wants to reinstall ubuntu.

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  • Join Us at Oracle OpenWorld Latin America (Dec 4-6)

    - by Zeynep Koch
    Hello to all Latin Americans,  Oracle Openworld Latin America is starting tomorrow. Oracle Linux will be showcased in different sessions and in the exhibition area. Here's some of the links and details to our sessions: Session Schedules: http://www.oracle.com/openworld/lad-en/session-schedule/index.html Oracle Linux sessions: New Features in Oracle Linux: A Technical Deep Dive,    Dec 4, 13:30-14:30, Mezzanine Room 7 Oracle Linux Strategy and Roadmap,   Dec 4, 17:15-18:15, Mezzanine Room 5 Oracle OpenWorld Latin America Exhibition Halls Hours Tuesday, December 4 12:00–19:3018:15–19:30 (Dedicated Hours)Wednesday, December 511:00–19:3018:30–19:30 (Dedicated Hours)Thursday, December 6 11:00–19:0017:45–19:00 (Dedicated Hours) We will also hand out the following in our booth, don't forget to visit us: - Oracle Linux and Oracle VM DVD Kit  - Server Virtualization for Dummies  See you there :)

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  • Software center crashing in 12.04

    - by Jordan
    i'm having issues with the Software Center. I'm trying to install Google Chrome, but can't because the software center crashes as soon as it opens. I've looked around at similar topics and found plenty but none of the suggested solutions have worked, so I wonder if this is different. When I type 'software-center' into the terminal, I get the error that other's have had: softwarecenter.backend.reviews - WARNING - Could not get usefulness from server, no username in config file I know this might seem like a duplicate, but none of the solution worked. Sorry, kind of new to Ubuntu. I use Ubuntu 12.04 lts

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  • How to apply a filter to the screen of a running program?

    - by Shahbaz
    The idea is to take old games without modifying them, but have the graphics card apply a series of filters to their output before sending them to the monitor. A very crude example would be to take a game that has a resolution of 640x480 and do: Increase the resolution to 1280x960 Apply a blur (low pass filter) Apply a sharpen (1 + high pass filter) These steps may not necessarily be the best to improve the visuals of an old game, but there are a lot of techniques that are well-known in image processing for this purpose. The question is, do the (NVidia) graphics cards give the ability to load a program that modifies the screen before sending it to the monitor? If so, how are they called and what terminology should I use to search? I would be comfortable with doing the programming myself if this ability is part of a library. Also, would the solution be different between Windows and Linux? If so, either is fine, since most of the games are probably runnable by wine.

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  • I cannot play some WMA files

    - by Lucio
    I did a backup of several music files from my older Windows XP system. Now I can play all the .MP3 files but not all the .WMA. There are some kinds of WMA files that can be reproduced without problems, may refute this in the picture below. The right file can be played, the left isn't. I have long been looking different sites, Q&A from here, installing many packages but not luck. An example is this answer. What can I do? My system: Ubuntu 11.10 32b. Player: Banshee & VLC

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  • Windows Forms Development - Books

    - by Scott
    So I'm reading a book for architecting applications for the enterprise from the Microsoft Press. It's a great book, and I'm learning a lot. However, it's very high level, and can be applied to a lot of different domains (not even just .NET, even though that's how the book is geared). The first project I want to develop after reading the book is a Windows Forms application in .NET 4.0. I want to use a lot of the books concepts to develop the app, but I really want a great Windows Forms dedicated book to read before starting that's really going to tell me all I need to know about developing Windows Forms apps. I found plenty of books for .NET 2.0 and stuff, but nothing for Windows Forms in the new .NET 4.0 Framework. Any suggestions?

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  • AS3 Calculating Delta Time In Seconds

    - by user1133079
    Here is how I've been trying to implement delta time based on different internet resources. var startTime:Number = getTimer(); game.Update(deltaTime); deltaTime = Number(getTimer() - startTime) * 0.001; My issue with this is it doesn't seem to be giving me accurate timing. The main update shows the frame time at 0.001 and when reinitializing the level it goes to 0.002. I'm using dt else where for a timer and later on time based physics so I would like it to work as expected. I must be missing something silly.

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  • SEO and multiple domains to same site

    - by mwb
    I have one website. I have two domain names that I want to point to the same site install. So whether you go to name-one.com or name-two.com you see the exact same site. Now, I can either set up name-two.com to serve 301 redirect header redirecting to name-one.com – or, I can set up name-two.com as a CNAME in the DNS pointing to name-one.com What is the different implications for SEO on this? What is recommended? I would guess it's better for branding to use a 301 redirect, so that visitors will see one consistent url for my site, right? The reason I want the two domains is that I want a version with regional letters ('ö' instead of 'oe' ) in the name.

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  • Building Enterprise Smartphone App &ndash; Part 2: Platforms and Features

    - by Tim Murphy
    This is part 2 in a series of posts based on a talk I gave recently at the Chicago Information Technology Architects Group.  Feel free to leave feedback. In the previous post I discussed what reasons a company might have for creating a smartphone application.  In this installment I will cover some of history and state of the different platforms as well as features that can be leveraged for building enterprise smartphone applications. Platforms Before you start choosing a platform to develop your solutions on it is good to understand how we got here and what features you can leverage. History To my memory we owe all of this to a product called the Apple Newton that came out in 1987. It was the first PDA and back then I was much more of an Apple fan.  I was very impressed with this device even though it never really went anywhere.  The Palm Pilot by US Robotics was the next major advancement in PDA. It had a simple short hand window that allowed for quick stylus entry.. Later, Windows CE came out and started the broadening of the PDA market. After that it was the Palm and CE operating systems that started showing up on cell phones and for some time these were the two dominant operating systems that were distributed with devices from multiple hardware vendors. Current The iPhone was the first smartphone to take away the stylus and give us a multi-touch interface.  It was a revolution in usability and really changed the attractiveness of smartphones for the general public.  This brought us to the beginning of the current state of the market with the concept of an online store that makes it easy for customers to get new features and functionality on demand. With Android, Google made this more than a one horse race.  Not only did they come to compete, their low cost actually made them the leading OS.  Of course what made Android so attractive also is its major fault.  It is so open that it has been a target for malware which leaves consumers exposed.  Fortunately for Google though, most consumers aren’t aware of the threat that they are under. Although Microsoft had put out one of the first smart phone operating systems with CE it had to play catch up and finally came out with the Windows Phone.  They have gone for a market approach between those of iOS and Android.  They support multiple hardware vendors like Google, but they kept a certification process for applications that is similar to Apple.  They also created a user interface that was different enough to give it a clear separation from the other two platforms. The result of all this is hundreds of millions of smartphones being sold monthly across all three platforms giving us a wide range of choices and challenges when it comes to developing solutions. Features So what are the features that make these devices flexible enough be considered for use in the enterprise? The biggest advantage of today's devices is network connectivity.  The ability to access information from multiple sources at a moment’s notice is critical for businesses.  Add to that the ability to communicate over a variety of text, voice and video modes and we have a powerful starting point. Every smartphone has a cameras and they are not just useful for posting to Instagram. We are seeing more applications such as Bing vision that allow us to scan just about any printed code or text to find information.  These capabilities have been made available to developers in the form of standard libraries for reading barcodes of just about an flavor and optical character recognition (OCR) interpretation. Bluetooth give us the ability to communicate with multiple devices. Whether these are headsets, keyboard or printers the wireless communication capabilities are just starting to evolve.  The more these wireless communication protocols grow, the more opportunities we will see to transfer data between users and a variety of devices. Local storage of information that can be called up even when the device cannot reach the network is the other big capability.  This give users the ability to work offline as well and transmit information when connections are restored. These are the tools that we have to work with to build applications that can be leveraged to gain a competitive advantage for companies that implement them. Coming Up In the third installment I will cover key concerns that you face when building enterprise smartphone apps. del.icio.us Tags: smartphones,enterprise smartphone Apps,architecture,iOS,Android,Windows Phone

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