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• Limitations in running Ruby/Rails on windows

  - by johnc

  In the installation documentation to RoR it mentions that there are many limitations to running Ruby on Rails on Windows, and in some cases, whole libraries do not work. How bad are these limitations, should I always default to Linux to code / run RoR, and is Iron Ruby expected to fix these limitations or are they core to the OS itself? EDIT Thanks for the answer around installation and running on Linux, but I am really trying to understand the limitations in functionality as referenced in the installation documentation, and non-working libraries - I am trying to find a link to the comment, but it was referenced in an installation read me when I installed the msi package I think

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• Artistic aspects of UI?

  - by anon

  Consider a single button. At one extreme, we have a black OpenGL window, with: outline (in white) of a rectangle bitmap remdered font inside of it, saying "Ok" At the other extreme, we have Mac OS X, a button that is: well rounded has some gradient showing light effects on it nice antialiased "OK" soft shadow of some sort These two UIs present very very different user experiences. The former says "This is from the 80s" the latter says "this is professional". This is something I do not understand well as a programmer (and don't know where to learn about this). Does anyone know of a good technical resource for this? [I'd prefer things that draws upon psychology / perception literature to say why to do something rather than design books that just says "use color XYZ with a gradient of blah"]

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• Able to ping but cannot browse after several hours running of my python program

  - by Shane

  It's a GUI program I wrote in python checking website/server status running on my XP SP3, multi threads are used to check different site/server. After several hours running, the program starts to get urlopen error timed out all the time, and this always happens right after a POST request from a server(not a certain one, might be A or B or C), and it's also not the first POST request causing the problem, normally after several hours running and it happens to make a POST request at an unknown moment, all you get from then on is urlopen error timed out. I'm still able to ping but cannot browse any site, once the program closed everything's fine. It's definitely the program causing this problem, well I just don't know how to debug/check what the problem is, also don't know if it's from OS side or my program wasting too many resources/connections(are you still able to ping when too many connections used?), would anybody please help me out?

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• Is there an NSCFTimer memory leak?

  - by mystify

  I tracked down a memory leak with instruments. I always end up with the information that the responsible library is Foundation. When I track that down in my code, I end up here, but there's nothing wrong with my memory management: - (void)setupTimer { // stop timer if still there [self stopAnimationTimer]; NSTimer *timer = [NSTimer scheduledTimerWithTimeInterval:0.2 target:self selector:@selector(step:) userInfo:nil repeats:YES]; self.animationTimer = timer; // retain property, -release in -dealloc method } the property animationTimer is retaining the timer. In -dealloc I -release it. Now that looks like a framework bug? I checked with iPhone OS 3.0 and 3.1, both have that problem every time I use NSTimer like this. Any idea what else could be the problem? (my memory leak scan interval was 0.1 seconds. but same thing with 5 seconds)

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• Performance analysis strategies

  - by Bernd

  I am assigned to a performance-tuning-debugging-troubleshooting task. Scenario: a multi-application environment running on several networked machines using databases. OS is Unix, DB is Oracle. Business logic is implemented across applications using synchronous/asynchronous communication. Applications are multi-user with several hundred call center users at peak time. User interfaces are web-based. Applications are third party, I can get access to developers and source code. I only have the production system and a functional test environment, no load test environment. Problem: bad performance! I need fast results. Management is going crazy. I got symptom examples like these: user interface actions taking minutes to complete. Seaching for a customer usually takes 6 seconds but an immediate subsequent search with same parameters may take 6 minutes. What would be your strategy for finding root causes?

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• Mutex names - best practice?

  - by Argalatyr

  Related to this question, what is the best practice for naming a mutex? I realize this may vary with OS and even with version (esp for Windows), so please specify platform in answering. My interest is in Win XP and Vista. EDIT: I am motivated by curiousity, because in Rob Kennedy's comment under his (excellent) Answer to the above-linked Question, he implied that the choice of mutex name is non-trivial and should be the subject of a separate question. EDIT2: The referenced question's goal was to ensure only a single instance of an app is running.

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• LibPNG + Boost::GIL: png_infopp_NULL not found

  - by Viet

  Hi, I always get this error when trying to compile my file with Boost::GIL PNG IO support: (I'm running Mac OS X Leopard and Boost 1.42, LibPNG 1.4) /usr/local/include/boost/gil/extension/io/png_io_private.hpp: In member function 'void boost::gil::detail::png_reader::init()': /usr/local/include/boost/gil/extension/io/png_io_private.hpp:155: error: 'png_infopp_NULL' was not declared in this scope /usr/local/include/boost/gil/extension/io/png_io_private.hpp:160: error: 'png_infopp_NULL' was not declared in this scope /usr/local/include/boost/gil/extension/io/png_io_private.hpp: In destructor 'boost::gil::detail::png_reader::~png_reader()': /usr/local/include/boost/gil/extension/io/png_io_private.hpp:174: error: 'png_infopp_NULL' was not declared in this scope /usr/local/include/boost/gil/extension/io/png_io_private.hpp: In member function 'void boost::gil::detail::png_reader::apply(const View&)': /usr/local/include/boost/gil/extension/io/png_io_private.hpp:186: error: 'int_p_NULL' was not declared in this scope /usr/local/include/boost/gil/extension/io/png_io_private.hpp: In member function 'void boost::gil::detail::png_reader_color_convert<CC>::apply(const View&)': /usr/local/include/boost/gil/extension/io/png_io_private.hpp:228: error: 'int_p_NULL' was not declared in this scope /usr/local/include/boost/gil/extension/io/png_io_private.hpp: In member function 'void boost::gil::detail::png_writer::init()': /usr/local/include/boost/gil/extension/io/png_io_private.hpp:317: error: 'png_infopp_NULL' was not declared in this scope

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• very quickly getting total size of folder

  - by freakazo

  I want to quickly find the total size of any folder using python. def GetFolderSize(path): TotalSize = 0 for item in os.walk(path): for file in item[2]: try: TotalSize = TotalSize + getsize(join(item[0], file)) except: print("error with file: " + join(item[0], file)) return TotalSize That's the simple script I wrote to get the total size of the folder, it took around 60 seconds (+-5 seconds). By using multiprocessing I got it down to 23 seconds on a quad core machine. Using the Windows file explorer it takes only ~3 seconds (Right click- properties to see for yourself). So is there a faster way of finding the total size of a folder close to the speed that windows can do it? Windows 7, python 2.6 (Did searches but most of the time people used a very similar method to my own) Thanks in advance.

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• elegant way to make directory recursively in Python?

  - by user248237

  I would like to make a directory in a "recursive" way, i.e. have a function make_directory() that behaves as follows: make_directory("a/b/c/d/") should create directory a, then child b, then c, then d. If any of the parent directories exist it should not make them. E.g. if "a" exists, then b should be a subdir of that, and then c should be made inside b, etc. how can I do this in python? os.mkdir does not have this behavior.

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• getting rid of ruby gems that won't die

  - by holden

  I've got a few ruby gems that won't go away. I think it has to do with when I installed them. Occasionally I have forgotten to use "sudo" before doing a gem install, which results in a write error and from what I can gather puts a copy of the gem in my user directory instead of somewhere it can run. But gem uninstall doesn't work. It continually shows up in 'gem list' but can't uninstall it from either gem uninstall, or sudo gem uninstall. I tried directly deleting one gem after finding the path in my 'gem environment', but that still left the gem on the list. Also is it possible just to remove all gems and start from scratch? These are driving me nuts. I'm running OS X. Thanks,

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• How to get XDebug working on Mac command line PHP

  - by Eugene M

  I recently installed Zend Server Community Edition on a Mac with Snow Leopard. I can't get XDebug to work ... it shows up in the output for phpinfo from a web browser, but when I var_dump() a variable, there is no special output, and when I run phpunit, code coverage reports aren't generated. Also when I type php -m at the command line, there is nothing for XDebug. I suspect that it's because the Mac is running the executable of PHP that was bundled with it instead of the executable of PHP that came with the Zend Server install. When I type /usr/local/zend/bin/php -m, XDebug does show up. I followed the instructions at http://akrabat.com/php/some-notes-on-zend-server-ce-for-mac-os-x/. Also I downloaded the xdebug.so from the Komodo web site. Zend Debugger and all other Zend extensions are disabled. So how can I get XDebug working correctly?

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• Mobile development decision - Future wise (Iphone,android,symbian)

  - by Idan

  Hi, I would like to learn mobile development, but I'm not sure which category would be the most cost effective one. I know it's kind of a prophecy question, but anyhow, suggestions would be welcomed. So, as i'm pretty familiar with C++ development , I though about learning QT. I understand that using QT, I can develop once and then deploy to symbian,Mee-go, and of course to windows, linux and more. (does that mean I won't have to lean each OS internal calls, and just learn the QT library ? ) Learning development for android , mean I will have to learn Java, which is not my preferred way of action right now. Another option is to learn Objective-C, but as it only apply to Iphone development, I think it's a pretty narrow zone for me. I want to learn a library, which would be a wise decision career wise. Any recommendations ?

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• Problems installing sql management studio express on win7-64

  - by P a u l

  Here's what happened: install sql express 2008 install sql 2008 sp1 download and install SSMSE x64. There is a popup re incompatibility with the OS, and the help takes you back to the sp1 download page. It won't install... in fact the install that comes up appears to be for sql server express and I see no mention of SSMSE anywhere in the tangle of dialogs. There appears to be no version of SSMSE for Win7-64 at this time. Do you know any way to fix this?

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• Load a file in a group objective-c Xcode

  - by okami

  I'd like to load a file from a specific Group in Xcode/Objective-c for example: I have TWO files named "SomeFile.txt" that are in two different folders (folders not groups yet) in the OS: SomeFolderOne |- SomeFile.txt SomeFolderTwo |- SomeFile.txt Inner Xcode I make two folders, and I put a REFERENCE to these two files: SomeGroupOne |- SomeFile.txt // this file is a reference to the SomeFile.txt from SomeFolderOne SomeGroupTwo |- SomeFile.txt // this file is a reference to the SomeFile.txt from SomeFolderTwo Now I want to read the txt content with: NSString *contents = [NSString stringWithContentsOfFile:@"SomeFile.tx" encoding:NSUTF8StringEncoding error:nil]; Ok it reads the 'SomeFile.txt' but sometimes the file read is from SomeGroupOne and sometimes the file is read from SomeGroupTwo. How to specify the group I want the file to be read?

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• Mimicking basic fcntl or SetHandleInformation call in .Net

  - by Tristan

  Tornado enables win32 support by faking Python's fcntl function using SetHandleInformation, which is available via ctypes on Windows. After some other small fixes, this actually works using IronPython on Windows as well (sadly, IronPython is five times slower). I'd like to get Tornado working on any CLI platform, such using Mono on OSX or Linux. Is there a managed, cross-platform, .Net approach that can fake fcntl? Here's the win32 code from Tornado: SetHandleInformation = ctypes.windll.kernel32.SetHandleInformation SetHandleInformation.argtypes = (ctypes.wintypes.HANDLE, ctypes.wintypes.DWORD, ctypes.wintypes.DWORD) SetHandleInformation.restype = ctypes.wintypes.BOOL HANDLE_FLAG_INHERIT = 0x00000001 F_GETFD = 1 F_SETFD = 2 F_GETFL = 3 F_SETFL = 4 FD_CLOEXEC = 1 os.O_NONBLOCK = 2048 FIONBIO = 126 def fcntl(fd, op, arg=0): if op == F_GETFD or op == F_GETFL: return 0 elif op == F_SETFD: # Check that the flag is CLOEXEC and translate if arg == FD_CLOEXEC: fd = int(fd) success = SetHandleInformation(fd, HANDLE_FLAG_INHERIT, arg) if not success: raise ctypes.GetLastError() else: raise ValueError("Unsupported arg") else: raise ValueError("Unsupported op")

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• Localization — how to check that Filename1 and Filename2 are the same

  - by modosansreves

  I want to know that Filename1, provided by the user is the same as stored in DB (Filename2). I was about to use string.Equals(Filename1, Filename2, StringComparison.CurrentCultureIgnoreCase) but then I doubted whether I should use StringComparison.InvariantCultureIgnoreCase. Obviously, I need to do this the same way OS does, or use appropriate API. In some cultures, AFAIK, characters (e.g. vocals) may change if the next one is Capitalized. As I primarily target English-speaking market, I'd like my software to work well throughout the world.

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• Screen overlay with Python, paint over an active window with background python script

  - by tvlife.admin

  Hi I'm writing a python script that runs in the background and takes screenshots of another application that is active. Then it analyses the screenshots and now it should overlay a certain image over the active app or the screen. I still need to be able to make mouse and keyboard inputs in the active app. So I need a way to overlay/paint on another window or on the screen, and still keep the other window the active window so that I can make inputs. I would prefer to do that with python in Mac OS, but if it isn't possible, other languages and even Windows (if really necessary) would also be ok. Can anybody help me? Thanks in advance!

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• CodePlex Daily Summary for Sunday, October 27, 2013

  CodePlex Daily Summary for Sunday, October 27, 2013Popular ReleasesASP.net MVC Awesome - jQuery Ajax Helpers: 3.5.3 (mvc5): version 3.5.3 - support for mvc5 version 3.5.2 - fix for setting single value to multivalue controls - datepicker min max date offset fix - html encoding for keys fix - enable Column.ClientFormatFunc to be a function call that will return a function version 3.5.1 ========================== - fixed html attributes rendering - fixed loading animation rendering - css improvements version 3.5 ========================== - autosize for all popups ( can be turned off by calling in js...Media Companion: Media Companion MC3.585b: IMDB plot scraping Fixed. New* Movie - Rename Folder using Movie Set, option to move ignored articles to end of Movie Set, only for folder renaming. Fixed* Media Companion - Fixed if using profiles, config files would blown up in size due to some settings duplicating. * Ignore Article of An was cutting of last character of movie title. * If Rescraping title, sort title changed depending on 'Move article to end of Sort Title' setting. * Movie - If changing Poster source order, list would beco...MoreTerra (Terraria World Viewer): MoreTerra 1.11.4: Release 1.11.4 =========== = Compatibility = =========== Updated to add the new tiles/walls in 1.2.1Gac Library -- C++ Utilities for GPU Accelerated GUI and Script: Gaclib 0.5.5.0: Gaclib.zip contains the following content GacUIDemo Demo solution and projects Public Source GacUI library Document HTML document. Please start at reference_gacui.html Content Necessary CSS/JPG files for document. Improvements to the previous release Add 1 demos Editor.Toolstrip.Document Added new features GuiDocumentViewer and GuiDocumentLabel is editable like an RichTextEdit control.BlackJumboDog: Ver5.9.7: 2013.10.24 Ver5.9.7 (1)FTP???????、２?????????????shift-jis????????????? (2)????HTTP????、???????POST??????????????????Fluent Validation for .NET: 5.0: If you find FluentValidation useful, please consider making a donation. Donate to FluentValidation Changes in this release: Display name is now lazily-loaded by default (as a result, localization via DisplayAttribute now works correctly) Added WebApi integration (contributed by dmorganb) Support for MVC 5 (package names are FluentValidation.Mvc5 and FluentValidation.Mvc5-signed) Remove support for partial trustAdder: Adder 1.0: First and I hope last version.TFS Workspaces Cleaner: TFS Workspaces Cleaner v1.0.5045: This is v1.0 of TFS Workspaces Cleaner, a tool that deletes Team Foundation Server workspaces that have not been accessed in a number of days, along with their files locally on disk.Config Transformation Tool: Config Transformation Tool v1.5: [+] Add encoding parameter to specify default encoding. [!] Default encoding has been changed to utf8 (Unicode before). [b] If you use set of parameters where last of parameter uses quotes - tool trims last quote, which changes parameter value. [b] If 'indent' was specified, but not 'indentchars' - tool fails with ArgumentNullException. [b] If verbose flag is not specified tool does not output any error logs to console.CtrlAltStudio Viewer: CtrlAltStudio Viewer 1.1.0.34322 Alpha 4: This experimental release of the CtrlAltStudio Viewer includes the following significant features: Oculus Rift support. Stereoscopic 3D display support. Based on Firestorm viewer 4.4.2 codebase. For more details, see the release notes linked to below. Release notes: http://ctrlaltstudio.com/viewer/release-notes/1-1-0-34322-alpha-4 Support info: http://ctrlaltstudio.com/viewer/support Privacy policy: http://ctrlaltstudio.com/viewer/privacy Disclaimer: This software is not provided or sup...VsTortoise - a TortoiseSVN add-in for Microsoft Visual Studio: VsTortoise Build 32 Beta: Note: This release does not work with custom VsTortoise toolbars. These get removed every time when you shutdown Visual Studio. (#7940) This release has been tested with Visual Studio 2008, 2010, 2012 and 2013, using TortoiseSVN 1.6, 1.7 and 1.8. It should also still work with Visual Studio 2005, but I couldn't find anyone to test it in VS2005. Build 32 (beta) changelogNew: Added Visual Studio 2013 support New: Added Visual Studio 2012 support New: Added SVN 1.8 support New: Added 'Ch...ABCat: ABCat v.2.0.1a: ?????????? ???????? ? ?????????? ?????? ???? ??? Win7. ????????? ?????? ????????? ?? ???????. ????? ?????, ???? ????? ???????? ????????? ?????????? ????????? "?? ??????? ????? ???????????? ?????????? ??????...", ?? ?????????? ??????? ? ?????????? ?????? Microsoft SQL Ce ?? ????????? ??????: http://www.microsoft.com/en-us/download/details.aspx?id=17876. ???????? ?????? x64 ??? x86 ? ??????????? ?? ?????? ???????????? ???????. ??? ??????? ????????? ?? ?????????? ?????? Entity Framework, ? ???? ...patterns & practices: Data Access Guidance: Data Access Guidance 2013: This is the 2013 release of Data Access Guidance. The documentation for this RI is also available on MSDN: Data Access for Highly-Scalable Solutions: Using SQL, NoSQL, and Polyglot Persistence: http://msdn.microsoft.com/en-us/library/dn271399.aspxLINQ to Twitter: LINQ to Twitter v2.1.10: Supports .NET 3.5, .NET 4.0, .NET 4.5, Silverlight 4.0, Windows Phone 7.1, Windows Phone 8, Client Profile, Windows 8, and Windows Azure. 100% Twitter API coverage. Also supports Twitter API v1.1! Also on NuGet.TerrariViewer: TerrariViewer v7.2 [Terraria Inventory Editor]: Added "Check for Update" button Hopefully fixed Windows XP issue You can now backspace in Item stack fieldsSimple Injector: Simple Injector v2.3.6: This patch releases fixes one bug concerning resolving open generic types that contain nested generic type arguments. Nested generic types were handled incorrectly in certain cases. This affects RegisterOpenGeneric and RegisterDecorator. (work item 20332)Virtual Wifi Hotspot for Windows 7 & 8: Virtual Router Plus 2.6.0: Virtual Router Plus 2.6.0Fast YouTube Downloader: Fast YouTube Downloader 2.3.0: Fast YouTube DownloaderMagick.NET: Magick.NET 6.8.7.101: Magick.NET linked with ImageMagick 6.8.7.1. Breaking changes: - Renamed Matrix classes: MatrixColor = ColorMatrix and MatrixConvolve = ConvolveMatrix. - Renamed Depth method with Channels parameter to BitDepth and changed the other method into a property.VidCoder: 1.5.9 Beta: Added Rip DVD and Rip Blu-ray AutoPlay actions for Windows: now you can have VidCoder start up and scan a disc when you insert it. Go to Start -> AutoPlay to set it up. Added error message for Windows XP users rather than letting it crash. Removed "quality" preset from list for QSV as it currently doesn't offer much improvement. Changed installer to ignore version number when copying files over. Should reduce the chances of a bug from me forgetting to increment a version number. Fixed ...New ProjectsC# In A Nutshell: TestDNN (DotNetNuke) Farsi - ?? ?? ?? (??? ?? ????) ?????: ?????? ????? ?????? ??? ?? ?? ?? ?? (??? ?? ????).examquestions: This is a uni projectFishing in Grenada Website: This project is to show progress in developing a Community Site for the Web Application Development Course at the University of Hertfordshire.HashTag Enterprise Library Logging Application Block Extensions: This library allows development teams using EntLib to deliver consistent log messages by using greatly simplified methods for writing messages to Logging Block.Ivion OS: Ivion OS adalah sistem operasi asli buatan anak Indonesia yang ditulis dengan bahasa Assembly.MVC4 Samples: You can easily develope an application in MVC Framework by the code samples provided by Microsoft Requirements:VS 2012My Journal Tracker - a DayOne Snapshot Client for Microsoft Windows: write your DayOne journal (a iOS and Mac OSX journal app) on your Windows PC. Make nice snapshots and view your journal on your iPad.Nigerian food lovers: This site attends to the needs of people who love Nigerian food. It brings them together and helps them answer basic questions.Online Radio 3.1: Software for listening online radio streams.OpenAntrag: Über das Portal OpenAntrag können Bürger über Fraktionen oder Einzelabgeordnete der Piratenpartei ihre Ideen und Wünsche einbringen. ORI_T1_2013_2: ORI, UFSCar, Dicionario, Tesauro, Hash, TabelaPiGest: Gestionale Open Source per piccole imprese.The Barter Website: The aim is to create a Web 2.0 Page which will allow it´s users to share goods they don´t need anymore in exchange for goods they currently need.Web Scripting - Assignment 1 - Simple Addition Project: Assignment 1 - Initial web 2.0 site idea and Subversion * Module - Web Application Development * University of HertfordshireWinPath Manager: The program is a utility to help users to perform the edits the window path variable and auto shorten it .

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• Old Sony Digital Tape Handycam, imported Video is sped up?

  - by thatryan

  Friend gave me their OLD handycam and a bunch of tapes asking me to put them on a DVD. The model is Sony DCR-TVR103 and it records onto Hi8 Digital tapes. It has a firewire port also. I am trying to use import function in iMovie on OS X 10.6. Every import though the video is super fast, like playing in fast forward. Ever seen anything like this? How can I import this video? Thank you.

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• OpenNETCF DirectShowPlayerControl display is going black randomly when playing videos if the player

  - by Sundar

  I have a application that runs on touch enabled device with WinCE 3.5 OS. I have a show player control to display adds when the system is left idle for some configured amount of time.. So the DirectShowPlayerControl will be iniated every time the show player is launched and will be destroyed when it is closed... The player for the first time plays videos continuously for any amount of time. Once the player is destroyed and recreated the video are changing but the display goes black and in between if some small video is placed that alone is displayed. Whenever the form is closed am calling DirectShowPlayerControl.Dispose() method.

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• Static Member Variables of the Same Class in C++

  - by helixed

  I'm trying to create a class which contains a static pointer to an instance of itself. Here's an example: A.h: #include <iostream> #ifndef _A_H #define _A_H class A { static A * a; }; A * a = NULL; #endif However, when I include A.h in another file, such as: #include "A.h" class B { }; I get the following error: ld: duplicate symbol _a in /Users/helixed/Desktop/Example/build/Example.build/Debug/Example.build/Objects-normal/x86_64/B.o and /Users/helixed/Desktop/Example/build/Example.build/Debug/Examplebuild/Objects-normal/x86_64/A.o I'm using the Xcode default compiler on Mac OS X Snow Leopard. Thanks, helixed

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• Python (windows) will open files from command line, but not from a script launched from eclipse

  - by Blake

  I'm pretty new to writing python for windows (linux is no problem), and am having problems getting python to recognize files when running scripts, though it behaves fine in the command line What am I doing wrong here? def verifyFile(x): # return os.path.isfile(x) This will return true (with a valid file, of course) when called from the python command line, but when I run the script from eclipse, or launch it from windows, it ALWAYS returns false. Any thoughts on why this is? I've tried passing pathnames like this: D:\Documents and Settings\BDE\Desktop\cdburn.jpg and like this: D:/Documents and Settings/BDE/Desktop/cdburn.jpg I've changed sys,argv[0] to '' I've tried this: def verifyFile(x): # try: f = open(x, 'r') f.close() return True except: return False and am getting no love! Any help would be appreciated. Thanks Blake

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• How to remove previous versions of Xcode

  - by Ed Marty

  When the 3.2 beta of the iPhone OS first came out, Xcode for 3.2 had to be installed side-by-side with the version for 3.1.2. I installed the new version (3.2) in /Developer and moved 3.1.2 to /Xcode3.1.2. Now I want to get rid of the old version and just use the new one since we can do that now. I ran the uninstall tool at /Xcode3.1.2/Library/uninstall-devtools and uninstall-developer-folder, but the directory still exists and has lots of stuff still in it, adding up to about 5 GB. At this point, am I safe just deleting the folder if I want to totally get rid of it and still use the /Developer folder? (At about 8 GB, it's got lots more in it, but I'm not sure if that's just because it's larger or because the old version was 8 GB before I ran the uninstall tool)?

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• Cannot run/debug Java applications in Eclipse (JavaTimeZone issue)

  - by Andre

  I'm trying to get started with Eclipse/Java/Scala on a MacBook. The installed JDK was 1.5. The SDT plugin for Scala requires 1.6 which was included in an OS update, but I also manually installed a package from Apple to update 1.6. The problem is that I cannot run anything from Eclipse. I always get the following error: An internal error occurred during: "Launching TestFooBasicTest". Could not initialize class com.ibm.icu.impl.JavaTimeZone I also tried to use the old 1.5 version, but to no avail. What is going wrong here?

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• How to find connected hosts at network (vpn or lan)

  - by Javier Novoa C.

  Hello, I'm looking for possible solutions to the following need: I have a VPN configured (using openVPN over Linux, BTW), and I want to know at any moment which hosts are connected to it. I recognize that it probably is the same thing as trying to know which hosts are connected to a lan, so any of the solutions might do the job... The fact is that I once used a hamachi vpn on linux and with it I had the chance to know which hosts were connected to a particular network where I belonged, so I was wondering if something similar might be possible in openVPN (or even any VPN and/or any LAN). Preferably, I'm looking for opensource/free sw solutions, or maybe the hints to program it myself (in the most simple way if possible, not that I don't know how to program, but I'm trying to achieve this in a simple manner). But anyway, if there are no os/fsw solutions, any other one might do... Thanks a lot! Javier, Mexico city

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