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  • OpenSUSE Li-F-E vs. Edubuntu vs. Ubuntu

    <b>ZDNet:</b> "As I noted in my post over on Between the Lines (&#8221;Why doesn&#8217;t IBM just buy Novell already?&#8221;), I&#8217;ve been testing OpenSUSE&#8217;s Linux for Education Project and Ubuntu 10.04 server beta 1."

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  • Unintentional run-in with C# thread concurrency

    - by geekrutherford
    For the first time today we began conducting load testing on a ASP.NET application already in production. Obviously you would normally want to load test prior to releasing to a production environment, but that isn't the point here.   We ran a test which simulated 5 users hitting the application doing the same actions simultaneously. The first few pages visited seemed fine and then things just hung for a while before the test failed. While the test was running I was viewing the performance counters on the server noting that the CPU was consistently pegged at 100% until the testing tool gave up.   Fortunately the application logs all exceptions including those unhandled to the database (thanks to log4net). I checked the log and low and behold the error was:   System.ArgumentException: An item with the same key has already been added. (The rest of the stack trace intentionally omitted)   Since the code was running with debug on the line number where the exception occured was also provided. I began inspecting the code and almost immediately it hit me, the section of code responsible for the exception is trying to initialize a static class. My next question was how is this code being hit multiple times when I have a rudimentary check already in place to prevent this kind of thing (i.e. a check on a public variable of the static class before entering the initializing routine). The answer...the check fails because the value is not set before other threads have already made it through.   Not being one who consistently works with threading I wasn't quite sure how to handle this problem. Fortunately a co-worker recalled having to lock a section of code in the past but couldn't recall exactly how. After a quick search on Google the solution is as follows:   Object objLock = new Object(); lock(objLock) { //logic requiring lock }   The lock statement takes an object and tells the .NET runtime that the current thread has exclusive access while the code within brackets is executing. Once the code completes, the lock is released for another thread to utilize.   In my case, I only need to execute the inner code once to initialize my static class. So within the brackets I have a check on a public variable to prevent it from being initialized again.

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  • How to use GetActiveUniform (in SharpGL)?

    - by frankie
    Generally, guesting is in header. I cannot understand how to use GetActiveUniform function. public void GetActiveUniform(uint program, uint index, int bufSize, int[] length, int[] size, uint[] type, string name); My attempt looks like this (everything is compiled and linked): var uniformSize = new int[1]; var unifromLength = new int[1]; var uniformType = new uint[1]; var uniformName = ""; Gl.GetActiveUniform(Id, index, uniformNameMaxLength[0], unifromLength, uniformSize, uniformType, uniformName); After call I get proper uniformSize, length and type, but not name.

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  • Does putting types/functions inside namespace make compiler's parsing work easy?

    - by iammilind
    Retaining the names inside namespace will make compiler work less stressful!? For example: // test.cpp #include</*iostream,vector,string,map*/> class vec { /* ... */ }; Take 2 scenarios of main(): // scenario-1 using namespace std; // comment this line for scenario-2 int main () { vec obj; } For scenario-1 where using namespace std;, several type names from namespace std will come into global scope. Thus compiler will have to check against vec if any of the type is colliding with it. If it does then generate error. In scenario-2 where there is no using namespace, compiler just have to check vec with std, because that's the only symbol in global scope. I am interested to know that, shouldn't it make the compiler little faster ?

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  • How do I best remove an entity from my game loop when it is dead?

    - by Iain
    Ok so I have a big list of all my entities which I loop through and update. In AS3 I can store this as an Array (dynamic length, untyped), a Vector (typed) or a linked list (not native). At the moment I'm using Array but I plan to change to Vector or linked list if it is faster. Anyway, my question, when an Entity is destroyed, how should I remove it from the list? I could null its position, splice it out or just set a flag on it to say "skip over me, I'm dead." I'm pooling my entities, so an Entity that is dead is quite likely to be alive again at some point. For each type of collection what is my best strategy, and which combination of collection type and removal method will work best?

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  • How to get files that have been added/modifed in a batch file

    - by Chris L
    I have the following batch file which concatenates all of the files in a folder that have a .sql ending. set func=%~dp0%Stored Procedures\*.sql for %%i in (%func%) do type "%%i" >>InstallScript.sql We use SVN as our repository, and we're using branching. Currently the script concatenates all the .sql files, even the ones that haven't changed. I'd like to change it so it only concatenates files that have been modified and/or created after the branch was created. We can do that by looking at the datetime on the .svn folder in each folder(there's a Stored Procedure, View, Function subfolders). But I don't know how to do that with batch files. Ideally something like this(psuedo code): set func=%~dp0%Stored Procedures\*.sql set branchDateTime=GetDateTime(%~dp0%.svn) <- Gets the datetime when the .svn folder was created for %%i in (%func%) { if(%%i.LastModifiedOrCreated > branchDateTime) do type "%%i" >> InstallScript.sql }

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  • What is a good design pattern and terminology for decoupling output?

    - by User
    I have a program where I want to save some data record. And I want the output type to be flexible such that I could save the data record to a text file, xml file, database, push to a webservice. My take on it would be to create an interface such as DataStore with a Save() method, and the concrete subclasses such as TextFileDataStore, DatabaseDataStore, etc. What is the proper name/terminology for this type of pattern (I'm using the term "DataStore", log4net names things "appenders", .net they talk about "providers" and "persistence")? I want to come up with good class names (and method names) that fit with a convention if there is one. can you point me to a decent example, preferably in C#, C++, or java? Update Managed to find this stack overflow question, Object persistence terminology: 'repository' vs. 'store' vs. 'context' vs. 'retriever' vs. (…), which captures the terminology part of my question pretty well although there's not a decent answer yet.

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  • Selecting Dynamic ID JQuery [migrated]

    - by Vedran Wex Maricevic
    I need to select dynamic id using JQuery, and once I select it then I need to do some action on it. This is the HTML that I have: <input id="content_photos_attributes_1355755712119_image" name="content[photos_attributes][1355755712119][image]" size="30" type="file"> Please note the id value, text is always the same however the number changes (I do not have control over that change). What I need to do is to create on click for that element. This is what I got so far, and it is not working. <script type="text/javascript"> jQuery.noConflict(); jQuery("input[id *= 'content_photos_attributes_']").click(function() { alert("Image deletion is clicked"); }); </script> It really makes no difference whether I select that element by ID or by its name.

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  • Are there any good books on how to design software?

    - by nc01
    I've been programming for a while and I think I write clean code. But I do this by hacking away, tinkering and testing things until I feel good about the functionality, and then coming in and refactoring, refactoring, refactoring. I tend to write mostly in PHP, Java, and C. Are there any good books that will help me learn to visualize things better and not code everything as if in an infinite REPL loop? Thanks.

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  • Planning for Recovery

    Uncertainty sets the tone of business planning these days and past precedents, 'rules of thumb' and trading history provide little comfort when assessing future prospects. After 18 years of constant growth in GDP, planning is no longer about extrapolating past performance and adjusting for growth. It is now about constantly testing the temperature of the water, formulating scenarios, assessing risk and assigning probabilities. So how does one plan for recovery and improve forecast accuracy in such a volatile environment?

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  • Address search from large text file

    - by user73809
    Basically I want to develop a Address lookup(part of my project) using C# (and I can use SQL if necessary). I have a very large text file which have all the UK address and postcodes. Addresses needs to be looked up from this text file. For example, as soon as a user type in the first letter of the postcode it should list all the postcodes starting with that letter and as they type in further, the list should narrow down. Could you guys please how I can do this search very fast and list the results in a efficient way. If you guys know any methods and technologies pls do advice.

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  • New Items in ReSharper 7!

    - by TATWORTH
    At http://tv.jetbrains.net/videocontent/webinar-whats-new-in-resharper-7 there is an excellent video on a selection of the new items in ReSharper 7.As I have said before, if you develop in C# or VB.NET, you should use ReSharper. Now it has been extended to allow unit testing of JavaScript. The above video mentions a possible extension to ReSharper for F#.There are more videos on ReSharper at http://tv.jetbrains.net/channel/resharper

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  • Est-ce une erreur de placer les firewalls en amont des serveurs ? Une étude démontre que cela favorise les attaques DDoS

    Les attaques DDoS de plus en plus nombreuses et favorisées par de mauvais déploiements des firewalls, injustement placés en amont des serveurs Arbor Networks s'est penché sur l'étude des attaques par déni-de-service, en interrogeant 111 fournisseurs d'accès dans le monde (autant pour des services fixes que mobiles), du fait de la recrudescence de ce type d'attaques en 2010. En effet, 25% du panel déclare y avoir été confronté plus de dix fois par mois, alors que 69% des répondants assure rencontrer ce type d'attaque au moins une fois sur la même période. Elles sont de également plus importantes et virulentes, atteignant pour la première fois les 100Gbps (c'est deux fois plus qu'en 2009, et dix fois plus qu'en 2005). Leur taille dev...

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  • cant boot ubuntu after install (first time)

    - by user1683645
    Trying to install ubuntu for the first time. I use an usb stick. At partition I use one of the hdd's I have and create a partition of 50gb for ubuntu @ /dev/sda and the partitions name is dev/sda1 with type ext4. All is well and the installation is completed without any errors and I get a dialogue asking me to restart but ubuntu does not boot. I only have one device as boot in my bios and I think its the devide with ubuntu on it since I've not partitioned the other discs. When I create the partition I yse primary type and localtion for the new partition is att the beginning of the space. And I use Ext4 file system. Mount point is / What am I doing wrong?

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  • ubuntu installtion problem

    - by yogi
    I have one machine in which Windows8 is already installed and having 3 partitions(one for windows OS). Now i wanted to install Ubuntu12.04, i have tried many times but ubuntu 12.04 installer not able to fine those partitions, even it is not recognise windows partition. please refer the images and please help me to solve this issue. Somehow i am not able to update images so i am just explain here. "Installation type " window - this window only shows two options 1)Erase disk and install ubuntu" 2) Something else * here there is no option for "Along with windows 8" option and in second window of "Installation type" it shows Device : /dev/sda freespace 500107 MB *there is nothing else. but i reality there is three partitions and i wanted to install Ubuntu in other partitions. I don't formate windows8. I am new with Ubuntu so please help me to install Ubuntu. Thanks.

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  • How does thumbnail preview in Ubuntu differ from that of Windows? [closed]

    - by Forbidden Overseer
    Possible Duplicate: How does Ubuntu know what file type a file without extension is I thought this question might get a better response in AskUbuntu, as it seems to have more to do with Ubuntu than Windows at a glance. Let's say I have a foo.mkv file. Thumbnail previews work in both Windows 7 and Ubuntu. When I change the filename to anything random like foo.bar or when I remove the extension itself (making it just foo), Nautilus shows thumbnails normally like if it can recognize what type of files they are - without looking at file extension. This however, doesn't happen in Windows 7. Windows starts asking me things like which application I want to use to open that file as soon as I remove file extension (forget thumbnails...) etc. So, How does this thumbnail preview work in Windows 7 and Ubuntu? What makes Ubuntu recognize files "out of the box" unlike Windows 7?

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  • How does the fstab 'defaults' option work? Is relatime recommended?

    - by hushs
    I know the fstab defaults option means this: rw,suid,dev,exec,auto,nouser,async. But what if I want to add one more option, for example relatime, should I still add defaults too or they are applied anyway? Is it needed to add at least one option? Some examples: 1. UUID=bfb42838-d866-4233-9679-96e7536356df /media/data ext3 defaults 0 2 2. UUID=bfb42838-d866-4233-9679-96e7536356df /media/data ext3 0 2 3. UUID=bfb42838-d866-4233-9679-96e7536356df /media/data ext3 defaults,relatime 0 2 4. UUID=bfb42838-d866-4233-9679-96e7536356df /media/data ext3 relatime 0 2 Is the (2) correct(no option at all)? Are the (1) and (2) the same? Are the (3) and (4) the same? Furthermore, I read in the Ubuntu Community Documentation that in Ubuntu 8.04 relatime was used as default for linux native file systems. Is it still true for 12.04? If yes, then why do I see this if I use the mount command: /dev/sda2 on / type ext4 (rw,errors=remount-ro) If no, why not? It isn't recommended to use relatime now? I just wanted to apply it to my non system partitions, it is a good idea? EDIT: I found an other command to list the mounted partitions and their options: cat /proc/mounts This is the result of a partition mounted with the defaults option in fstab: /dev/sdb2 /media/adat ext3 rw,relatime,errors=continue,barrier=1,data=ordered 0 0 This is the output of mount for the same partition: /dev/sdb2 on /media/adat type ext3 (rw) And here is both result if the same partition mounted from Nautilus as a non-root user: /dev/sdb2 /media/adat ext3 rw,nosuid,nodev,relatime,errors=continue,barrier=1,data=ordered 0 0 /dev/sdb2 on /media/adat type ext3 (rw,nosuid,nodev,uhelper=udisks) So it looks like relatime is used if we mount an ext partition in 12.04. So it is unneeded to add it manually. So my problem is broadly solved. But I still can't see why the options that should be in the defaults are not listed even with the cat /proc/mounts. Maybe there is a third and even better method to list the partition mount options :)

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  • Groovy support in Java EE projects

    - by Martin Janicek
    As requested in the issue 144038, I've implemented support for Groovy in a Java enterprise projects. You should be able to combine Java/Groovy files, run them and thanks to the new Groovy JUnit tests support you can also run groovy tests together with your existing Java tests. I hope it will make your enterprise development (and especially enterprise testing) easier and more productive. Note: The changes will be propagated to the NetBeans daily build in a few days, so please stay in touch!

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  • What's Your Method of not forgetting the end brackets, parentheses

    - by JMC Creative
    disclaimer: for simplicity sake, brackets will refer to brackets, braces, quotes, and parentheses in the couse of this question. Carry on. When writing code, I usually type the beginning and end element first, and then go back and type the inner stuff. This gets to be a lot of backspacing, especially when doing something with many nested elements like: jQuery(function($){$('#element[input="file"]').hover(function(){$(this).fadeOut();})); Is there a more efficient way of remembering how many brackets you've got open ? Or a second example with quotes: <?php echo '<input value="'.$_POST['name'].'" />"; ?>

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  • ETPM Forms Accelerator

    - by MHundal
    The ETPM Forms Accelerator provides a template that can be used to enter data related to Registration and Tax Forms.  The Forms Accelerator includes a worksheet for each portion related to forms development (Form Type, Form Section, Form Lines and Form Rules).  The Forms Accelerator provides the details that must be defined in ETPM.  This allows for taking an existing form and translating the details of that form into the spreadsheet.  The spreadsheet can then be used to define the details in the system.  In addition, each of the items to be defined is explained it detail - what the field expects and based on the input, how it impacts the field and form definition.   This is a living document - as there is feedback provided, the document will be updated.  The goal of this accelerator is to be an aide in the Forms Development process.  We encourage feedback to help improve the document.  The document is for ETPM 2.3.1.  Implementations using older version of ETPM will find that some of the field definition options may not exist their current system.   The spreadsheet attached contains the following Worksheets: Instructions:  High-level overview for the different worksheets provided. Form Type:  The fields to be populated when defining the Form Type for a Registration or Tax Form Form Section:  The fields to be populated when creating a Form Section.  The number of sections will differ based on the the form being implemented. Form Lines:  The fields to be populated when creating different Form Lines. The number of lines per section will differ based on the form being implemented. Form Rules:  Based on the form, allows for documenting the Form Rules to be configured based on form instructions and Form Lines. Right click on the link and select the "Save Link As" option.  ETPM Forms Accelerator.xls Please provide feedback to [email protected]. You feedback is encouraged and appreciated.  

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  • How To Prevent Microsoft SQL Injection in ASP.Net

    This is a two-part tutorial series meant to help beginners understand MS SQL database injection and the problems associated with it particularly when applied to an ASP.NET web form application. It also outlines preventive measures which will be discussed thoroughly in the second part so that you can secure your SQL-based web applications.... ALM Software Solution ? Try it live! Requirements Management, Project Planning, Implementation Tracking & QA Testing.

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  • How to add SMS text messaging functionality to my website?

    - by jessegavin
    I want to add the ability to send reminders to people via email and SMS for specific events that they have signed up for on a web application that I am building. The email part is not difficult, but I am wondering where to find a good solution for sending SMS messages. It would also be a plus if this solution allowed two-way SMS communication with my web application so that people would be able to reply with a CONFIRM or CANCEL type of a message. Has anyone implemented something like this? Does anyone know of good tools out there? EDIT: I am realizing that this is more of a "lots of ways to skin this cat" type of question and so I changed it to community wiki.

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  • Where is the time spent?

    - by 280Z28
    Game development is a large process. In your experience, how are the total hours for releasing a game divided over the following major areas. I believe this is useful because few people (none?) are really good at all the areas, so this helps me balance the cost of items I'm not so good at when estimating the complexity of creating a game. Modeling and raw asset creation (textures, audio) Level design Gameplay design Programming Testing Marketing

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