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  • Time to ignore IDisposable?

    - by Mystagogue
    Certainly we should call Dipose() on IDisposable objects as soon as we don't need them (which is often merely the scope of a "using" statement). If we don't take that precaution then bad things, from subtle to show-stopping, might happen. But what about "the last moment" before process termination? If your IDisposables have not been explicitly disposed by that point in time, isn't it true that it no longer matters? I ask because unmanaged resources, beneath the CLR, are represented by kernel objects - and the win32 process termination will free all unmanaged resources / kernel objects anyway. Said differently, no resources will remain "leaked" after the process terminates (regardless if Dispose() was called on lingering IDisposables). Can anyone think of a case where process termination would still leave a leaked resource, simply because Dispose() was not explicitly called on one or more IDisposables? Please do not misunderstand this question: I am not trying to justify ignoring IDisposables. The question is just technical-theoretical.

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  • dismissModalViewControllerAnimated: crashes in Simulator but not on phone

    - by Jon
    I'm doing the following: [self.parentViewController dismissModalViewControllerAnimated:YES] This code fails using the Simulator but works with no issues on the phone itself. The Simulator's console shows no erros. I used NSLog statements to pinpoint this line of code as the culprit. When running on the phone, however, the console(windoworganizer) shows that the above code is executed and the application proceeds forward with no problem. When running the code in debugger, the following statement appears at the bottom of the Xcode debug window: GDB: Data Formatters temporarily unavailable, will re-try after a 'continue'. (Not safe to call dlopen at this time.) Then a window dispalys stating: Loading 43672 stack frames. (that sounds bad) In the debug window the following line appears numerous times: [UIView(Hierarchy) _makeSubtreePerformSelector:withObject:withObject:copySublayers:] Without getting too deep into my code, does anyone know about or have experience with this type of condition? Thanks

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  • realistically speaking, could a seasoned .net developer enter the java space and land a job?

    - by mrblah
    I've been working with .net since 2001, and I am considering making a move into the java space. I find that java has so many more mature tools (hibernate is more mature, spring framework, established patters/designs, containers, distributed cache frameworks, etc etc.) I have been doing .net, and just recently I have been getting into design patterns, ORMS, etc. and it just seems the .net side of things are not as mature. Yes the trend going forward looks great as more and more are getting into this design strategy etc. I don't want this to get into a flame war, but I read that its not about the framework/stack, but the tools around it are what make the difference. And to me Java seems to be the winner. Anyhow, the real question here is, could I realistically get into shape in 6 months? i.e. Someone would consider hiring me, and not at a junior dev pay rate? Is this a bad idea?

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  • Why does does my stack overflow error occur after 518669 specifically?

    - by David
    I created a java program to count up toward infinity: class up { public static void up (int n) { System.out.println (n) ; up (n+1) ; } public static void main (String[] arg) { up (1) ; } } i didn't actually expect it to get there but the thing that i noticed that was a bit curious was that it stopped at the same number each time: 518669 what is the significance of this number? (or of this number +1 i suppose). (also as a bit of an aside question, I've been told that the way i format my code is bad [indentation and such] what am i doing that isn't desirable?)

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  • Partition table is corrupt

    - by Tim
    I have a corrupt the partition table on the laptop that is running Ubunutu 10.4. Before the partition table was corrupt I had the following partitions: 2 primary partitions: 1st - NTFS 2nd - Extended 4 logical partitons that are built within 2nd extended: 1st NTFS (68 Gib) 2nd Linux (19 Gib) 3rd Swap (1.4 Gib) 4th Linux (24 Gib) The physical order of these partitions was the following: ( 4th Linux ) - ( 1st NTFS ) - ( 2nd Linux ) - ( 3rd Swap ) The logical order of the partition was different: ( 1st NTFS ) - ( 2nd Linux ) - ( 3rd Swap ) ( 4th Linux ) NTFS partition was big and it resided between 2 Linux partitions, neither of these partitions had enough space to install Oracle 11g for my project with prof. Gamper and Markus Innerebner. Therefore, I decided to a) either move the NTFS partion to the left or b) remove it completely and extend partition where Linux resides. As I tool I have chosen GParted. But unfortunately it was not able to move the partition because he found that in NTFS partition there are some blocks that are referenced multiple times. Also it was not able to remove the partition neither, because in this case the partitions that follow it ( 2nd Linux ) - ( 3rd Swap ) have to be in his opinion also removed, because the organization of extended partition is a linked list. Since GParted was not able to do such thing I was trying to find another tool. I found diskdrake tool on PSLinuxOS distribution of linux. That tool silently deleted ( 1st NTFS ) partition and I thought that everything was fine. But diskdrake has damaged the partition in a way that I am not able either to boot from the hard disk nor to see the partitions with GParted and even with diskdrake itself! Fortunately I have a live CD of Ubuntu 8.10 and I am able to boot and see hard disk. I have 2 ideas how I can solve the problem: 1) Manually change disk partitions and point them to the correct partitions. 2) Create partition table with GParted that as much as possible is the same with the previous one I find the 2nd approach less time consuming but some data will be lost because of it is not possible to place borders of the partitions exactly how it was before. And moreover I am not sure if such approach would work, for example, if the OS is able to locate files after repartitioning. I feel like that it will but not 100% sure. Are there some ideas how the problem may be solved?

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  • "return false" is ignored in certain browsers for link added dynamically to the DOM with JavaScript

    - by AlexV
    I dynamically add an <a> (link) tag to the DOM with: var link = document.createElement('a'); link.href = 'http://www.google.com/'; link.onclick = function () { window.open(this.href); return false; }; link.appendChild(document.createTextNode('Google')); //someDomNode.appendChild(link); I want the link to open in a new window (I know it's bad, but it's required) and I don't want to use the target attribute. My code works well in IE and Firefox, but the return false don't work in Safari, Chrome and Opera. By don't work I mean the link is followed after the new window is opened.

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  • Using Django Admin for a custom database solution

    - by Prashanth Ellina
    A client wants to have a simple intranet application to manage his process. He runs a Quarry and wishes to track number of loads delivered per day and associated activities. Since I knew about Django's excellent Admin interface, I figured I could define the "Schema" in models.py and have Django Admin generate the forms. I did exactly that and the result is not bad at all. I've been able to customize the look and feel to suit the client's taste. Some questions: Is Django Admin the right choice for such a use-case? Will I run to problems in the future due to flexibility of the framework? Is there a better framework out there specifically designed for this use-case (general Database management for small businesses)? I prefer ones written in Python since I can hack it up to customize. Thanks!

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  • How "duplicated" Java code is optimized by the JVM JIT compiler?

    - by Renan Vinícius Mozone
    I'm in charge of maintaining a JSP based application, running on IBM WebSphere 6.1 (IBM J9 JVM). All JSP pages have a static include reference and in this include file there is some static Java methods declared. They are included in all JSP pages to offer an "easy access" to those utility static methods. I know that this is a very bad way to work, and I'm working to change this. But, just for curiosity, and to support my effort in changing this, I'm wondering how these "duplicated" static methods are optimized by the JVM JIT compiler. They are optimized separately even having the exact same signature? Does the JVM JIT compiler "sees" that these methods are all identical an provides an "unified" JIT'ed code?

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  • Why does calling glMatrixMode(GL_PROJECTION) give me EXC_BAD_ACCESS in an iPhone app?

    - by MrDatabase
    I have an iphone app where I call these three functions in appDidFinishLaunching: glMatrixMode(GL_PROJECTION); glOrthof(0, rect.size.width, 0, rect.size.height, -1, 1); glMatrixMode(GL_MODELVIEW); When stepping through with the debugger I get EXC BAD ACCESS when I execute the first line. Any ideas why this is happening? Btw I have another application where I do the same thing and it works fine. So I've tried to duplicate everything in that app (#imports, adding OpenGLES framework, etc) but now I'm just stuck.

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  • Returning errors from AMFPHP on purpose.

    - by Morieris
    When using flash remoting with amfphp, what can I write in php that will trigger the 'status' method that I set up in my Responder in Flash? Or more generally, how can I determine if the service call has failed? The ideal solution for me would be to throw some exception in php serverside, and catch that exception in flash clientside... How do other people handle server errors with flash remoting? var responder = new Responder( function() { trace("some normal execution finished successfully. this is fine."); }, function(e) { trace("how do I make this trigger when my server tells me something bad happened?"); } ); myService = new NetConnection; myService.connect("http://localhost:88/amfphp/gateway.php"); myService.call("someclass.someservice", responder);

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  • Python/Django: Which authorize.net library should I use?

    - by Parand
    I need authorize.net integration for subscription payments, likely using CIM. The requirements are simple - recurring monthly payments, with a few different price points. Customer credit card info will be stored a authorize.net . There are quite a few libraries and code snippets around, I'm looking for recommendations as to which work best. Satchmo seems more than I need, and it looks like it's complex. Django-Bursar seems like what I need, but it's listed as alpha. The adroll/authorize library also looks pretty good. The CIM XML APIs don't look too bad, I could connect directly with them. And there are quite a few other code snippets. What's the best choice right now, given my fairly simple requirements?

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  • how to get game sound or how to create good sound for iPhone

    - by iPhone Fun
    Hi all, I am having problem of getting sound. i.e. how to get good sounds for our iPhone games? or how to make some good quality sounds for iPhone game applications so that the applications will become some more attractive? There are many sites like www.freesound.org , but I am not able to get good sounds as per my choice. If any one know from where we can get good sounds or how to make such things please help me. As this will be help full to all for using sounds in the applications of iPhone or other. Thanks in advance and Sorry for my BAD English.

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  • How can I de-install a Perl module installed via `cpan`?

    - by Kinopiko
    I am using Perl running in user space (not installed via root) and installing modules via the command-line cpan. I would like to know if there is a simple way to remove a module without having to do a lot of work deleting individual files. I searched for this question on the internet and found some answers, but the answers I've found seem to either discuss using the Perl package manager (specific for Microsoft Windows), otherwise operating-system specific (BSDpan), suggesting using cpanplus (which I've had several bad experiences with), or ended by pointing to a dead link as follows: http://www.cpan.org/misc/cpan-faq.html#How_delete_Perl_modules. My question is specifically whether there is a clean way to remove a module installed via cpan.

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  • Objective-C @class / import best practice

    - by Winder
    I've noticed that a lot of Objective-C examples will forward declare classes with @class, then actually import the class in the .m file with an import. I understand that this is considered a best practice, as explained in answers to question: http://stackoverflow.com/questions/322597/objective-c-class-vs-import Coming from C++ this feels backwards. I would normally include all needed .h files in the new classes header file. This seems useful since it would make the compiler generate a warning when two classes include each other, at which point I can decide whether this is a bad thing or not then use the same Objective-C style and forward declare the class in the header and include it in the .cpp file. What is the benefit of forward declaring @class and importing in the implementation file? Should it be a best practice in C++ to forward declare classes rather than including the header file? Or is it wrong to think of Objective-C and C++ in these similar terms to begin with?

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  • DRY programming dilemma

    - by fayer
    the situation is like this: im creating a Logger class that can write to a file but the write_to_file() function is in a helper class as a static function. i could call that function but then the Log class would be dependent to the helper class. isn't dependency bad? but if i can let it use a helper function then what is the point of having helper functions? what should one prioritize here: using helper functions and have to include this helper class everywhere (but the other 99 methods wont be useful) or just copy and paste into the Log class (but then if i have done this 100 times and then make a change i have to change in 100 places). share your thoughts and experience!

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  • Considering migrating to silverlight - are there any official figures for silverlight propagation, a

    - by SLC
    We are considering migrating our site from flash to silverlight, and also building additional components in silverlight. However there is a strong argument that many people do not have silverlight on their computers, and will not or cannot install silverlight. Are there any official figures on how many computers have adopted silverlight, and is it a bad idea to build a company website with elements of silverlight on it? Please note I am not trying to be subjective here, I am looking for solid, official figures and also advice about whether this is considered in general by developers to be an acceptable deployment solution. I have to discuss this issue with my boss later.

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  • POSIX threads and signals

    - by Donal Fellows
    I've been trying to understand the intricacies of how POSIX threads and POSIX signals interact. In particular, I'm interested in: What's the best way to control which thread a signal is delivered to (assuming it isn't fatal in the first place)? What is the best way to tell another thread (that might actually be busy) that the signal has arrived? (I already know that it's a bad idea to be using pthread condition variables from a signal handler.) For reference about why I want this, I'm researching how to convert the TclX package to support threads, or to split it up and at least make some useful parts support threads. Signals are one of those parts that is of particular interest.

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  • remove notification bar shadow in android app

    - by defrex
    In android, the notification bar at the top has a shadow most of the time. However, sometimes, such as when an app has it's title-bar showing, or in some other cases (such as in the twitter app or the market) that shadow effect is gone. My guess is that the shadow is supposed to be there when the content underneath can scroll. In my app, however, the content underneath can't scroll, and I think the shadow looks bad on the top part of my logo. Does anyone know how to disable it?

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  • Combine DVCS with Visual Source Safe

    - by WBlasko
    I'm forced to use Visual Source Safe 2005 at work. I'd like to combine that with a DVCS, so that I can check in files locally without disrupting my co-workers if there's a bug or it doesn't compile. In my attempts with Mercurial, it works, but causes a few weird issues. Namely, it thinks someone else has checked out the files I have checked out. Here's my thoughts on how I should manage it: Disable auto-checkout. Work locally in Mercurial When I'm ready to push my changes... Clone my Mercurial repository. Update my Visual Source Safe repository Pull and merge the two repositories using Mercurial. Check everything into Visual Source Safe. Does this sound reasonable? I'm always hearing bad things about VSS, is this just asking for me to see those problems firsthand?

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  • How can I use data binding in WPF to create a new user control for each element in a list?

    - by Joel
    I have a list of objects. For each item in the list, I want to create a new user control bound to that item. From what I've read, doing this programmatically is bad practice with WPF (as well as less than straightforward), so I should use data binding as a solution instead. The problem is, I can't figure out how to do this. I don't know the contents of the list (just the type) at compile-time, so I can't create and bind with XAML for each element. Google and MSDN don't seem to have any answers, so maybe I'm thinking about this the wrong way? What do I need to do? Thanks

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  • a more pythonic way to express conditionally bounded loop?

    - by msw
    I've got a loop that wants to execute to exhaustion or until some user specified limit is reached. I've got a construct that looks bad yet I can't seem to find a more elegant way to express it; is there one? def ello_bruce(limit=None): for i in xrange(10**5): if predicate(i): if not limit is None: limit -= 1 if limit <= 0: break def predicate(i): # lengthy computation return True Holy nesting! There has to be a better way. For purposes of a working example, xrange is used where I normally have an iterator of finite but unknown length (and predicate sometimes returns False).

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  • GTK+ (GTKSharp) poor performance in Windows

    - by nubela
    Hi, In my Mono (C#) project that is meant to be cross-platform, I am using the GTK for the UI. However one thing I noticed is, on my netbook in Archlinux, the performance is really speedy, so events such as mouse hover, and redrawing of widgets, etc, are really fast. Compared to windows (7) on dual core CPUs, the performance is really really weak. Which perplexes me. Am I doing something wrong that is warranting this difference in performance between OSes? What are some ways I can do to optimize GTK on Windows? Its really bad to take around 0.5 secs for a hover event to kick in whereas its almost immediate on a weak(er) netbook with Linux. My code is here for the GUI layer: http://code.google.com/p/subsynct/source/browse/branches/dev/subsync#subsync/GUI Thanks!

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  • Repeated Scene Trees (Java3d / OpenGL)

    - by Jim
    Hello, I want to make a 3d scene that loops around on its self. That is to say, if you keep going in any direction, you will loop back to the other side. My current implementation is so bad, it's embarrassing to admit to it. I redraw the each change twenty-seven times, to make a 3x3x3 scene cube. When the user reaches the end of the middle cube, I jump them over to the other side. Maintaining consistency (let alone performance) is a nightmare. Total Disaster. This doesn't seem like it would be an unusual request, so I'm wondering if anyone knows of a more legit solution. Thanks!

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  • How can I repair my USB drive?

    - by yurko
    USB drive is in read only state and I can't repair it. First of all I tried erase it using dd: root@yurko-laptop:/home/yurko-laptop# ls -l /dev/disk/by-id | grep usb lrwxrwxrwx 1 root root 9 ??? 18 23:45 usb-Generic_Flash_Disk_C173828A-0:0 -> ../../sdb lrwxrwxrwx 1 root root 10 ??? 18 23:45 usb-Generic_Flash_Disk_C173828A-0:0-part1 -> ../../sdb1 root@yurko-laptop:/home/yurko-laptop# dd if=/dev/zero of=/dev/sdb dd: ?????? ? «/dev/sdb»: ?? ?????????? ????????? ????? 8257537+0 ??????? ??????? 8257536+0 ??????? ???????? ??????????? 4227858432 ????? (4,2 GB), 942,633 c, 4,5 MB/c After that I wanted to create new filesystem using fdisk: root@yurko-laptop:/home/yurko-laptop# fdisk /dev/sdb You will not be able to write the partition table. WARNING: DOS-compatible mode is deprecated. It's strongly recommended to switch off the mode (command 'c') and change display units to sectors (command 'u'). Command (m for help): p Disk /dev/sdb: 4227 MB, 4227858432 bytes 4 heads, 63 sectors/track, 32768 cylinders Units = cylinders of 252 * 512 = 129024 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Device Boot Start End Blocks Id System /dev/sdb1 18 32768 4126596 b W95 FAT32 Command (m for help): fdisk showed that the partition still exists and I can't write the partition table. I tried to delete the existing partition: Command (m for help): d Selected partition 1 Command (m for help): w Unable to write /dev/sdb root@yurko-laptop:/home/yurko-laptop# Why am I not be able to write the partition table? Does it mean that some hardware failure occurred? And is it possible to repair the current USB drive? I've tried to use hdparm and it showed that the readonly flag is on: root@yurko-laptop:/home/yurko-laptop# hdparm /dev/sdb /dev/sdb: SG_IO: bad/missing sense data, sb[]: f0 00 05 00 00 00 00 0a 00 00 00 00 26 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 multcount = 0 (off) readonly = 1 (on) readahead = 256 (on) geometry = 1016/131/62, sectors = 8257536, start = 0

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  • Address calling class [Java]

    - by Samuel
    Hello! [I am rather new to Java and Object Oriented programming] I have an abstract class Moveable with the method abstract void move() which is extended by the class Bullet and the abstract class Character, and Character is extended by the class Survivor and the class Zombie. In Survivor and Bullet the move() method doesnt require any parameters while in the class Zombie the move() method depends on the actual position of the survivor. The survivor and multiple zombies are created in the class Gui. I wanted to access the survivor in Zombie - what's the best way of doing this? In Gui i wrote a method getSurvivor() but i don't see how to access this method in Zombie? I am aware that as a workaround i could just pass a [Survivor survivor] as parameter in move() and ignore it in Bullet and Survivor, but that feels so ... bad practice. Thank you for your time! Samuel [I am not sure what tags to set here, please correct me if i'm wrong]

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