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• :-( A valid signing identity matching this profile could not be found in your keychain

  - by user262325

  Hello everyone I hope to test my app on iPod Touch I created development provisioning profile. I dragged downloaded .mobileprovision file to Organizer There is a yellow triangle warned that "A valid signing identity matching this profile could not be found in your keychain" The others distribution provisioning profiles have no any problem. I checked my connected iPod Touch. Organizer also said that: OS Installed on "interdev"'s iPod 3.1.3 (7E18) Xcode Supported iPhone OS Versions 3.1.1 (7C146) 3.1.1 (7C145) 3.1 (7C144) 3.0.1 (7A400) 3.0 2.2.1 2.2 2.1.1 2.1 2.0.2 (5C1) 2.0.1 (5B108) 2.0 (5A347) 2.0 (5A345) ipod os 3.1.3 xocde 3.1 Do I need to upgrade Xcode? Thanks interdev

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• Ubuntu | Ruby - Can't Remove Ruby 1.9.2 from system

  - by JWally

  I'm new to ubuntu, and might have had a couple of false starts updating ruby / rails. I'm trying to start clean by removing all versions of every thing ruby from my system I think I've installed everything through either Synaptic, or aptitude purge, but I can still do the following: jwally@jwally-laptop:~$ ruby -v ruby 1.9.2p0 (2010-08-18 revision 29036) [i686-linux] jwally@jwally-laptop:~$ gem -v 1.3.7 jwally@jwally-laptop:~$ irb irb(main):001:0> RUBY_VERSION => "1.9.2" but when I type "dpkg -l | grep ruby, I only get the following: rc ruby1.8-elisp 1.8.7.249-2 ruby-mode for Emacsen thanks in advance

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• Does GIT have evil twin issues?

  - by Senthil A Kumar

  In ClearCase evil twin occurs when two files are found with the same name in two different versions of the directory, and If the element OIDs are different but the names are the same. In GIT the SHA1 id is always unique and file with same name always have different SHA1 id’s. We don’t have a concept of Evil twins, but there are likely cases where there is chance for 2 or more developers creating a file with different contents with same filename in the same directory. During merge, when both files are completely different, there are chances of the developers to keep his changes alone and leave other changes resulting in code loss. Can anyone let me know if there will be issues in GIT similar to ClearCase or sine each SHA1 id is unique there won't be any Evil twin issues in GIT.

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• JNDI classes needed!!

  - by artaxerxe

  I have instaled in my computer a JDK version 1.6. (I'm learning about JNDI) When i run this: Hashtable env = new Hashtable(); env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.fscontext.RefFSContextFactory"); try { // Create the initial context Context ctx = new InitialContext(env); //... i get an error : Caused by: java.lang.ClassNotFoundException: com.sun.jndi.fscontext.RefFSContextFactory Caused by: java.lang.ClassNotFoundException: com.sun.jndi.fscontext.RefFSContextFactory Does it means that i need some classes to include in my classpath? I read in the tutorial that versions of jdk recently than v 3 doesn't need to download other classes. Thank advance!

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• Windows code pages, what are they?

  - by Mike D

  I'm trying to gain a basic understanding of what is meant by a Windows code page. I kind of get the feeling it's a translation between a given 8 bit value and some 'abstraction' for a given character graphic. I made the following experiment. I created a "" character literal with two versions of the letter u with an umlaut. One created using the ALT 129 (uses code page 437) value and one using the ALT 0252 (uses code page 1252) value. When I examined the literal both characters had the value 252. Is 252 the universal 8 bit abstraction for u with an umlaut? Is it the Unicode value? Aside from keyboard input are there any library routines or system calls that use code pages? For example is there a function to translate a string using a given code table (as above for the ALT 129 value)?

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• Django ORM and PostgreSQL connection limits

  - by bennylope

  I'm running a Django project on Postgresql 8.1.21 (using Django 1.1.1, Python2.5, psycopg2, Apache2 with mod_wsgi 3.2). We've recently encountered this lovely error: OperationalError: FATAL: connection limit exceeded for non-superusers I'm not the first person to run up against this. There's a lot of discussion about this error, specifically with psycopg, but much of it centers on older versions of Django and/or offer solutions involving edits to code in Django itself. I've yet to find a succinct explanation of how to solve the problem of the Django ORM (or psycopg, whichever is really responsible, in this case) leaving open Postgre connections. Will simply adding connection.close() at the end of every view solve this problem? Better yet, has anyone conclusively solved this problem and kicked this error's ass?

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• What are the biggest differences between Scala 2.8 and Scala 2.7?

  - by André Laszlo

  I've written a rather large program in Scala 2.75, and now I'm looking forward to version 2.8. But I'm curious about how this big leap in the evolution of Scala will affect me. What will be the biggest differences between these two versions of Scala? And perhaps most importantly: Will I need to rewrite anything? Do I want to rewrite anything just to take advantage of some cool new feature? What exactly are the new features of Scala 2.8 in general?

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• strod() and sprintf() inconsistency under GCC and MSVC

  - by Dmitry Sapelnikov

  I'm working on a cross-platform app for Windows and Mac OS X, and I have a problem with two standard C library functions: strtod() (string-to-double conversion) ? sprintf (when used for outputting double-precision floating point numbers) -- their GCC and MSVC versions return different results. I'm looking for a well-tested cross-platform open-source implementation of those functions, or just for a pair of functions that would correctly and consistently convert double to string and back. I've already tried the clib GCC implementation, but the code is too long and too dependent on other source files, so I expect the adaptation to be difficult. What implementations of string-to-double and double-to-string functions would you recommend?

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• Colour output piped to less

  - by mmacaulay

  Operating system: Mac OS 10.6.2 I'd like to be able to see colour output when piping certain commands through less. Two examples: I've got ls aliased to ls --color=auto, so I'd like to be able to see colour when I do this: ls -l | less I've also got the color extension turned on in Mercurial, so I'd like to see colour output from: hg diff | less and hg st | less After some googling, it seems like some versions of less support either -r or -R to make this work, but no dice for me. I can't see anything in the man page that looks like what I need. (-r or -R SEEM to be the right options, but again, they don't seem to work)

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• How to make python_select work for '$>python' command?

  - by Jim

  I installed a couple of pythons in different versions with macports, and the apple python 2.6 is also working. Now I need to run a program which requires MySQLdb package support in python, and this package was installed to the python I installed by macports. The program tells me that there is no MySQLdb installed, so I guess it is the apple python working for that program. I searched for some help and found python_select for switching between pythons. However after the command $>sudo python_select python25 told me that it selected the version "python25" for python, when I type $>python it is still apple python 2.6 that launches. The question is that how can I make python25(the one with MySQLdb) work for the program rather than apple python? Another important thing, the program is NOT a .py file and needs to be compiled before running. So do I need to re-install this program? My Mac OS version is Snow Leopard 10.6. Any answer is appreciated.

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• Compiler warning when passing NSError ** as a method parameter

  - by splicer

  I've been scratching my head about this for the last 4 hours, trying out all kinds of little experiments, but I can't seem to figure out what's going wrong. Could this be a compiler bug? Test.m: - (id)initWithContentsOfURL:(NSURL *)aURL error:(NSError **)error { if (!(self = [super init])) { return nil; } return self; } main.m: NSError *error; Test *t = [[Test alloc] initWithContentsOfURL:[NSURL fileURLWithPath:@"/"] error:&error]; Here's the compiler warning (from main.m): warning: incompatible Objective-C types 'struct NSError **', expected 'struct NSDictionary **' when passing argument 2 of 'initWithContentsOfURL:error:' from distinct Objective-C type I'm using the latest versions of Xcode and Snow Leopard.

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• How was non-decimal money represented in software?

  - by dan04

  A lot of the answers to the questions about the accuracy of float and double recommend the use of decimal for monetary amounts. This works because today all currencies are decimal except MGA and MRO, and those have subunits of 1/5 so are still decimal-friendly. But what about the software used in U.S. stock markets when prices were in 1/16ths of dollar? The accuracy of binary data types wouldn't have been an issue, right? Going further back, how did pre-1971 British accounting software deal with pounds, shillings, and pence? Did their versions of COBOL have a special PIC clause for it? Were all amounts stored in pence? How was decimalisation handled?

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• Compiling .NET component that uses a non specific required version of a 3rd Party Vendor component

  - by Dan

  If someone were to develop a .NET component that relied on non specific versions of a vendor DLL - let's say it worked with My3rdPartyComponent.dll which is a .NET assembly, but it didn't matter which version. Some instances of classes found in this component would need to be passed into my component. Developers would reference my component dll but not have access to the source code. Basically, I want to be able to require the user to pass in an instance of 3rdPartyComponent.MyClass to my component functions but I do not care if it's version 1.1, 2.2, 2.23.980, etc of the 3rd party dll. Is there a way to do this while still typing the parameter I want to be passed in to my component? I don't want to use Object as the reference. In my component project I could specify SpecificVersion=True on the assembly reference. Will this solve my problem or will there be other 'dll hell' issues to deal with that I am not seeing?

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• Multiple complete HTTP requests stuck in TCP CLOSE_WAIT state

  - by Sean Owen

  I have a Java and Tomcat-based server application which initiates many outbound HTTP requests to other web sites. We use Jakarta's HTTP Core/Client libraries, very latest versions. The server locks up at some point since all its worker threads are stuck trying to close completed HTTP connections. Using 'lsof' reveals a bunch of sockets stuck in TCP CLOSE_WAIT state. This doesn't happen for all, or even most connections. In fact, I saw it before and resolved it by making sure to set the Connection: Close response header. So that makes me think it may be bad behavior of remote servers. It may have come up again since I moved the app to a totally new service provider -- different OS, network situation. But, I am still at a loss as to what I could do, if anything, to work around this. Some poking around on the internet didn't turn up anything I'm not already doing. Just thought I'd ask if anyone has seen and solved this?

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• file_column not creating files, just empty tmp directory

  - by Yanaek

  Up to the end of December 2009 everything worked fine, so i assume that after some upgrades on servers (Ubuntu 8.10 and second Ubuntu 9.10) something stopped working. Model: class Product < ActiveRecord::Base belongs_to :category file_column :thumbnail, :magick = { :geometry = "150x100" } there is of course table 'products' in database, and it has column 'thumbnail' what's interesting that File actually is uploaded to server, it goes to the /tmp directory under RackMultipartXXXX-0 name, and it is unmodified image. The problem is, that then this file is not moved to 'tmp' dir under RAILS_ROOT/public/product/ nor the 'XX' (where xx means ID of a product) under public/product also. i don't know what to do, i spend few HOURS trying different versions of file_column, also trying to make new, test rails application only from scaffold, but then, in this new application problem was the same

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• user agent checking for ios6

  - by Akash Saikia

  I am trying to check whether client opening the page is using iOS6 or not. var startIndex = navigator.userAgent.search(/OS/i) + 2; var endIndex = navigator.userAgent.search(/like/i); var iOSVersion = parseInt(navigator.userAgent.substr(startIndex,endIndex - startIndex).trim()); this.iOSVersion = true; if(!isNaN(iOSVersion)){ this.iOSVersion = iOSVersion; } else if(Ext.is.Desktop){ this.iOSVersion = true; } The above code works well for all the versions of browsers. But incase of using it in iOS6, it shows as iOS5. Searched for the same thing, but I didn't find a solution. May be I am still not done with searching for this, doing side by side search and hoping if some one has faced this issue before. Any suggestions or updations?

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• Source code comparison app that doesn't require files?

  - by ZenBlender

  I'm looking for an easy-to-use, free source code comparison app for Windows, which will highlight differences side-by-side between two pieces of source code. Some apps get close to what I want, but are too restrictive by requiring you load in entire files and compare them in their entirety. Sometimes I just want to compare a section of my file, such as a single function, which may be in totally different locations in the two versions I'd be comparing, making it hard to find in both panes in large files. Basically, I'd like to be able to simply edit/copy/paste the content in both panes rather than have the restriction of using files. That way I can copy and paste one function into one pane and another into the other, editing/re-ordering as necessary. (Note that I realize there are other comparison app recommendation threads out there, but I'm having a hard time finding a free app that isn't a strict file-to-file comparison app) Thanks for any pointers or links, thanks!

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• What is your Wordpress 2.9 theme development workflow after getting PSD from client?

  - by metal-gear-solid

  What are useful and free resources to make Wordpress 2.9 themes? Is Dreamweaver helpful to make themes ? What are time saving tips? I'm using Dreamweaver CS3 on Windows. and my main browser is FF 3.6. I know some extensions of dreamweaver but those are not updated with wordpress versions. Should we edit theme files directly on live server or Local XAMPP option is better? Should i create XHTML CSS version of PSD then XHTML CSS to wordpress? After making XHTML CSS Version of PSD how to incorporate Wordpress 2.9 Tags in it? Has anyone tried this tool http://www.themedreamer.com/ is this really helpful?

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• Using Spotlight as the "database" of an application

  - by vicvicvic

  I'm developing an OS X application to organize "things" (as iTunes is to music and iPhoto to photos). Instead of having my own database and index, I'm considering using Spotlight to essentially serve this purpose. Has anyone tried this? Is it wise? The main benefit, as I see it, would be simplicity and avoiding redundancy. It seems a bit wasteful to implement my own index machinery when OS X comes with one built in. I have little experience working with Spotlight, however. From a user's perspective, I do know that it has been slow and imprecise in older versions of OS X. I also have a gut-feeling that since it's aimed at searching the whole filesystem, using it for "local" purposes becomes hackish. Obviously, my applications's index needs to constantly be up-to-date. Can mdimport be used for this?

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• Could the assign function for containers possibly overflow?

  - by Kristo

  I ran into this question today and thought I should post it for the community's reference and/or opinions. The standard C++ containers vector, deque, list, and string provide an assign member function. There are two versions; I'm primarily interested in the one accepting an iterator range. The Josuttis book is a little ambiguous with its description. From p. 237... Assigns all elements of the range [beg,end); this is, is replaces all existing elements with copies of the elements of [beg,end). It doesn't say what happens if the size of the assignee container is different from the range being assigned. Does it truncate? Does it automagically expand? Is it undefined behavior?

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• DBMS for POS software

  - by Andrew Smith

  Hello, I want to develop a POS application in .NET (C#) that would be used to rent items. I have a good idea of what will be done and the famous question that I have is about the DBMS that I should use. I would like to use MySQL database. The question is: If some places use only one computer (no network, no internet connection), can I use a MySQL database in local? Do I need to install MySQL server on all thoses computers to be able to use such a database? I know SQLite but I'm not sure if the limitations can cause problems in the future... I also looked at SQLServer Express versions. (I must consider that other point of sales are using multiple computers and more transactions so there I can't put sqlexpress or sqlite) So can anybody suggest me what I should do in that situation? Thanks

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• How do you use kate? Tips/Tricks/Workflow

  - by Roman A. Taycher

  We all seen a bunch of these? Mostly for IDE's but also for vim and emacs. Kate is (only) a text editor (an awesome one) but it has a ton of options plus a number of plugins, so its hard to know all of it well. How do use the Kate text editor? Please share your workflow and help me and others learn some of the cool tricks you use. I'll start I use the built in terminal a lot opening files quickly, and using it as an enhanced haskell repl with ghci (since ghci doesn't allow you all to just put in all kinds of haskell code). Also use split views to quickly compare files (especially different versions of the same file). Also the auto-complete maybe simple(more use for saving typing time then remembering functions) but it works really well for that. Also if You highlight something and hit a start [/{/( it puts it in between brackets rather then replacing it with a bracket(why the hell do a lot of IDEs not have this feature).

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• haystack's RealTimeSearchIndex causes django to hang on data entry

  - by lsc

  I'm using django-haystack and a xapian backend with real time indexing (haystack.indexes.RealTimeSearchIndexing) of model data and it works fine on my Ubuntu server. However, it causes django to hang upon data entry when I deployed the app on a RHEL5 server. Everything is hunky dory if I switch to a standard SearchIndex. Running ./manage.py rebuild_index manually works fine too. The major differences between the two setups would be the versions of Python (2.4.3 vs 2.6.4) and the xapian (1.0.4-1 vs 1.0.15). Any suggestions on what may be the problem? Nothing interesting appears in the logs, and I've tried different databases (mysql, sqlite3) and deployment methods (mod_python, wsgi) with no luck yet. I have noted the warning on the haystack docs stating that RealTimeSearchIndex is only handled gracefully with a Solr backend, however I'm running a very traffic site with only occasional writes so I'm fine with some CPU overheads on writes.

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• How to improve IntelliJ code editor speed?

  - by Hoàng Long

  I am using IntelliJ (Community Edition) for several months, and at first I'm pleased about its speed & simplicity. But now, after upgrading to version 10, it's extremely slow. Sometimes I click a file then it takes 5 - 15 seconds to open that file (it freeze for that time). I don't know if I have done anything which cause that: I have installed 2 plugins(regex, sql), and have 2 versions of IntelliJ on my machine (now the version 9 removed, only version 10 remains). Is there any tips to improve speed of code editor, in general, or specifically IntelliJ? I have some experience when using IntelliJ: 1. Should open IntelliJ a while before working, cause it needs time for indexing. Don't open too many code tabs Open as less other program as possible. I'm using 2 GB RAM WinXP, and it just seems fairly enough for Java, IntelliJ & Chrome at the same time.

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• Run Windows XP on a usb drive virtually on Windows XP?

  - by Russell

  I am sick of not being able to run and install certain applications on my work computer due to admin restrictions (eg: Adobe AIR) . I have heard of smaller versions of Windows running on a usb thumb drive and have looked into it but can't find anything on running windows virtually from a usb drive. I would like to be able to login to this particular computer, insert my usb drive and then open up another version of windows installed on the thumb drive while still being able to use the windows I logged in on (literally be able to alt+tab between the main desktop and the virtual desktop from the usb drive). Is this even possible? For further clarification: The version of windows has to be Windows XP and there is no other option available for what I want to do. Looking forward to a response.

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