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  • How would I detect if two 2D arrays of any shape collided?

    - by user2104648
    Say there's two or more moveable objects of any shape in 2D plane, each object has its own 2D boolean array to act as a bounds box which can range from 10 to 100 pixels, the program then reads each pixel from a image that represents it, and appropriatly changes the array to true(pixel has a alpha more then 1) or false(pixel has a alpha less than one). Each time one of these objects moves, what would be the best accurate way to test if they hit another object in Java using as few APIs/libraries as possible?

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  • Why did the command ":(){ :|: & };:" make my system lag so badly I had to reboot?

    - by blade19899
    Danger! Do not run this command to "test" it unless you are prepared for a crash and/or force-rebooting your system I was in my Virtualbox running 12.04 trying to compile an app, and while waiting I happened to chance upon a forum where a comment said: Try :(){ :|: & };: Fun, too, and doesn't need root. Without thinking I ran it in my gnome-terminal it made my 12.04 virtualbox lag so badly I had to shut it down. My question is what does this command do? :(){ :|: & };:

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  • Binding Data to Web Performance Tests

    Web Performance Tests provide a simple means of ensuring correct and performant responses are being returned from your web application. Testing a wide variety of inputs can be tedious without a way to separate test recording and input selection. Data binding provides a convenient and simple way to try an unlimited number of different inputs as part of your web performance tests using Visual Studio 2010.

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  • I want to start using TDD. Any tips for a beginner?

    - by Mike42
    I never used an automated test mechanism in any of my projects and I feel I'm missing a lot. I want to improve myself, so I have to start tackling some issues I've been neglecting like this and trying Git instead of being stuck on SVN. What's a good way to learn TDD? I'll probably be using Eclipse to program in Java. I've heard of JUnit, but I don't know if there's anything else I should consider.

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  • Estimates, constraint and design [closed]

    - by user65964
    For your next two software projects (assuming that you're getting programming assignments, otherwise consider the program to find the min and max of a set of rational numbers) estimate how much effort they would take before doing them, then keep track of the actual time spent. How accurate were your estimates? State the requirements, constraint, design, estimate (your original estimate and the actual time it took), implementation (conventions used, implement/test path followed.

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  • Oracle Snapshot Not Working [closed]

    - by nayef harb
    i have created a snapshot that takes data from 2 tables and has a refresh rate of 1 day. The snapshot data is not refreshing it is still the same. is there something that i am missing ? Here is the code: CREATE SNAPSHOT test REFRESH COMPLETE START WITH SYSDATE NEXT sysdate + 1 AS select item_code,item_conc_code,tran_bran_code,sum(tran_qty) bal_qty from tranhist a, itemmast b where a.tran_item_code = b.item_code group by item_code,item_conc_code,tran_bran_code

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  • Should debug code be left in place, always, or added only when debugging and removed when the bug has been found?

    - by gablin
    I, for one, only add debug code (such as print statements) when I'm trying to locate a bug. And once I've found it, I remove the debug code (and add a test case which specifically tests for that bug). I feel that it's cluttering the real code and therefore has no place there unless I'm debugging. How do you do it? Do you leave the debug code in place, or remove it when obsolete (which may be difficult to judge when that is)?

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  • Skype/14.04: no sound output in conversations

    - by user272554
    I installed Skype 4.2 via PPA on my fresh 14.04 system. Skype itself makes notification sounds (though distorted), but when I am in a conversation, I receive neither sound, nor video. I tested it with my mom, she could hear and see me, but I couldn't see or hear her, and the sound test is quiet too. I didn't install any additional drivers yet, as I'm much of a newbie I'm not sure which ones to choose. Please let me know if you need any command outputs.

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  • Supporting Large Scale Team Development

    With a large-scale development of a database application, the task of supporting a large number of development and test databases, keeping them up to date with different builds can soon become ridiculously complex and costly. Grant Fritchey demonstrates a novel solution that can reduce the storage requirements enormously, and allow individual developers to work on thir own version, using a full set of data.

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  • 12.04 Booting into Terminal

    - by user170796
    To preface this, I would like to say that I am completely new to Ubuntu and have essentially zero programming experience/experience working with command line and terminal. I installed Ubuntu because I would like to get into programming. If you could provide me with the simplest instructions possible, I would be grateful. I have a Lenovo Ideapad Y500 (Intel i7, NVidia GT 750m, 1TB HDD, 16GB SSD cache, 8GB RAM) with Windows 8 on it. Using a Live CD, I installed Ubuntu 12.04 onto a 75 GB partition. During the installation, I kept all default settings except for one thing; I decided to encrypt my home folder, and so checked the corresponding box. The installation completed, and I restarted. Once I restarted, I saw the options "Ubuntu, with Linux 3.2.0-23-generic" "Ubuntu, with Linux 3.2.0-23-generic (recovery mode)" "Memory test (memtest86+)" "Memory test (memtest86+, serial console 115200)" "Windows Recovery Environment (loader) (on /dev/sdb3)" "Windows 8 (loader) (on /dev/sdb5)" "System Setup" I chose the first option, and was directed to a screen with the Ubuntu logo and the row of five dots below that change from orange to white. Then, I was brought to a full screen terminal that prompted me to login, which I did. I saw no option to boot into GUI at all, and am lost. I've been searching around and have tried the "startx" command to no avail. Should the command have some sort of context or something? I've also tried selecting the recovery mode option from the boot manager. I've tried the resume option from the following menu, which eventually just shuts down the computer after displaying a lot of scrolling text that's too fast for me to read. I've also tried the failsafex mode from the recovery mode menu, which only brings up a terminal box at the bottom of the window that covers the entire bottom part of the screen. Commands won't work in this window. When I try to access Windows 8, I get a message saying that the EFI file path was not specified or something along those lines. I had to enable Secure Boot in order to access Windows 8 (I had disabled it to be able to boot from the Live CD), which is functioning normally. I am at a complete loss for what to do. Any help will be extremely appreciated. EDIT: Bonus question! If you could figure out a way for me to boot to Windows 8 without having to enable Secure Boot, it would save me a lot of trouble. I can deal with switching every time, but I'd rather not have to.

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  • Sql statement return with zero result [closed]

    - by foodil
    I am trying to choose the row where 1)list.ispublic = 1 2)userlist.userid='aaa' AND userlist.listid=list.listid I need 1)+2) There is a row already but this statement can not get that row, is there any problem? List table: ListID ListName Creator IsRemindSub IsRemindUnSub IsPublic CreateDate LastModified Reminder 1 test2 aaa 0 0 1 2012-03-09 NULL NULL user_list table (No row): UserID ListID UserRights My test version SELECT l.*, ul.* FROM list l INNER JOIN user_list ul ON ul.ListID = l.ListID WHERE l.IsPublic = 1 AND ul.UserID = 'aaa' There is zero result. How can I fix that?

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  • What are my audio devices?

    - by hellocatfood
    I'm attempting to use easycap to record from my camcorder but I'm having a slight problem. Using their test script I'm able to get audio and video. I've noticed that in the script on line 159 it makes a call to "DEV_ADUIO", which is reported as being "plughw:2,0". Exactly what is this device? Is it located in /dev/ somewhere? I've done "ls /dev/" and I can't find anything that would suggest an audio device

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  • Are there Windows virtual images available for development? [closed]

    - by Nick T
    I want to test deployment of a Windows application and a virtual PC seems the easiest method (I could be wrong, feel free to comment, but the question still stands). Courtesy my Windows 7 I have Virtual PC, and I seem to recall way back in XP I could download a pre-made image for Virtual PC 200x(7?) and use that without having to install from media. Are there any similar images for developers for Virtual PC?

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  • Tutorial on Hudson, JUnit and Ant

    - by Grant Ronald
    Often when discussing ADF we often show the features for developing applications. However, writing applications is only one part.  Building in a team, integrating code, testing it...these are equally important to the success of the project.  If you would like to find out how features in JDeveloper can help you build, maintain, integrate and test your application then check out this tutorial.

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  • SQL Azure - Creating backups and copies of your databases

    As a DBA you always followed a practice to back up your database (or take a snapshot of your database) before making any changes so that you can revert to your old database state if something goes wrong. Also to setup a development or test environment you use a backup of your database and restore it in the respective environment. If you are moving to SQL Azure, what would you do in these cases as backup / restore and database snapshots are not supported as of now?

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  • Is there a quick and practical (hands on) way to learn another programming language?

    - by Tamsin
    Due to rather strange circumstances, I only have until Monday to learn (at least) the basics of PHP and .NET programming. I'm already fairly competent (though there is a lot of room for improvement) in C++ so I feel I have some of the concepts nailed already, but I need to get into the two languages in a bit more depth in a very short time frame. Unfortunately I won't have time to get any books so will need to exclusively use online resources, I'm more of a 'do-er' so any way to test my skills in a practical way would be a huge bonus :-)

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  • Nautilus doesn't see setgid

    - by Shara
    I want to share a folder for two users, here is what I did: created group add users to group set chmod set chown set setgid 2775 reboot After that: echo test > /Common/testfile - group readable&writable Created file using Nautilus - group readable, but not writable Copied file using Nautilus - group readable, but not writable Created file using gedit - group readable&writable Why? Is it a bug? This was on a clean Ubuntu 10.10 installation.

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  • Which devices is my app working on

    - by Woojah
    My team is developing an app that will work on about 100 (or more) different android devices. We are having trouble testing it since we are not sure how to verify if it works on all the different devices. Can anybody suggest some best practices, a testing framework, or some sort of way to give us feedback on how to test our app and/or get feedback from our users so they can tell us the problems they are having?

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  • Game programming and quantity of timers

    - by andresjb
    I've made a simple 2D game engine using C# and DirectX and it's fully functional for the demo I made to test it. I have a Timer object that uses QueryPerformanceCounter and I don't know what's the better choice: use only one timer in the game loop to update everything in the game, or an independent timer in every object that needs one. My worry is that when I try to implement threads, what will happen with timers? What happens with the sync?

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