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• Garbage collection in Perl

  - by srikfreak

  Unlike Java, Perl uses reference count for garbage collection. I have tried searching some previous questions which speak about C++ RAII and smart pointers and Java GC but have not understood how Perl deals with the circular referencing problem. Can anyone explain how Perl's garbage collector deals with circular references? Is there any way to reclaim circular referenced memory which are no longer used by the program or does Perl just ignores this problem altogether?

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• Create objective-c class instance by name?

  - by Mark

  Duplicate: http://stackoverflow.com/questions/1034350/dynamic-class-creation-in-objective-c/1034368#1034368 Is it possible to create an instance of a class by name? Something like: NSString* className = @"Car"; id* p = [Magic createClassByName:className]; [p turnOnEngine]; I don't know if this is possible in objective-c but seems like it would be, Thanks

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• remove element in javascript

  - by Hulk

  In the below code how to remove the hyperlink after getting the innerHTML function test(obj) { var a=obj.innerHTML // remove obj element here } $p = $('<a id="name" onclick="javascript:var ele=test(this);">').html( "test" ); $('#questions').append( $p ); Thanks..

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• Push Notification (duplicate?)

  - by Moshe

  I've seen other questions here about PNS, in terms of code, but how does the concept work?do I need to tell my client that they need a server? What goes in the server in terms of configuration/cron or whatever? Please explain the process. Thanks a ton. EDIT: Please explain: Do I need to purchase an SSL certificate, or does Apple issue a "client" or " app" SSL certificate for me?

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• Regex fix for this? [extension]

  - by Yeti

  Sorry for the redundancy, I should've asked this in my previous question here: http://stackoverflow.com/questions/3061407/whats-the-regex-to-solve-this-problem This question is an extension: From the elements in an array below: http://example.com/apps/1235554/ http://example.com/apps/apple/ http://example.com/apps/126734 http://example.com/images/a.jpg I'm separating out apps/{number}/ and apps/{number} using: foreach ($urls as $url) { if (preg_match('~apps/[0-9]~', $url)) echo $url; } Now, how do I also push {number} to another array with the same regex?

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• wait for the second VB script untill ended from primary VB script

  - by yael

  Hi I have VB script that run second VB script The second VB script ask some questions from the input box My problem is that “MyShell.Run” not wait until SecondVBscript.vbs will ended And the Other VB syntax run immodestly also Need to wait for MyShell.Run process ended and then perform the Other VB syntax How can I do that? Set MyShell = Wscript.CreateObject("WScript.Shell") MyShell.Run " C:\Program Files\SecondVBscript.vbs" Set MyShell = Nothing Other VB syntax

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• Showing IPhone keyboard in different languages based on user input.

  - by itsaboutcode

  Hi, My question is related to the following question, and can be said almost same. http://stackoverflow.com/questions/330542/setting-the-iphone-keyboard-language But here are my requirement. I am writing dictionary app for IPhone, which support multiple languages. So my requirement is to display the English keyboard when user has selected English language and show Dutch keyboard when user has selected Dutch and so on. So i was wondering if this is possible? Thanks.

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• wait for the second VB script untill ended from primary VB script

  - by yael

  Hi I have VB script that run second VB script The second VB script ask some questions from the input box My problem is that “MyShell.Run” not wait until SecondVBscript.vbs will ended And the Other VB syntax run immodestly also Need to wait for MyShell.Run process ended and then perform the Other VB syntax How can I do that? Set MyShell = Wscript.CreateObject("WScript.Shell") MyShell.Run " C:\Program Files\SecondVBscript.vbs" Set MyShell = Nothing Other VB syntax

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• When to address integer overflow in C

  - by Yktula

  Related question: http://stackoverflow.com/questions/199333/best-way-to-detect-integer-overflow-in-c-c In C code, should integer overflow be addressed whenever integers are added? It seems like pointers and array indexes should be checked at all. When should integer overflow be checked for? When numbers are added in C without type explicitly mentioned, or printed with printf, when will overflow occur? Is there a way to automatically detect when an integer arithmetic overflow?

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• Showing labels in BibTex [LaTeX]

  - by Shahin

  Hi, I'm currently using the apalike style for my bibliography, using natbib for author-year, however when I generate the bibliography I lose the labels that normally precede the reference, i.e. [S. Rostami, 2010] Shahin Rostami (2010) http://stackoverflow.com/questions/ask etc etc.. I read apalike.bst and it seems this is intended, my quesiton is, how do I get them back? Something I can include in the preamble? Otherwise is there a similar style that shows labels?

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• Android - TimePicker selecting the button and input field

  - by teepusink

  Hi, I'm trying to modified the way TimePicker works as asked in my question here http://stackoverflow.com/questions/2580216/android-timepicker-minutes-to-15 To be able to do that I need to know if the + and - button was clicked and to disable the input field. So can I target the elements in a TimePicker? (i.e the + and - button and the input field)? Also is there anyway to determine if the + or the - button was clicked? Thanks, Tee

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• How to create a window looks like Tweetie Mac OS X app new post window

  - by Denis Barushev

  I have some questions about this window: What type this window is (I've found that only "Textured Window" has rounded bottom corners)? Why it doesn't have a title? Could I add it? How to add a label to the title (word counter). How to add a bottom bar?

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• Does REGEX differ from PHP to Python

  - by daemonfire300

  hi there, I found this post: http://stackoverflow.com/questions/118143/python-regex-vs-php-regex but I actually did not get if Python's REGEX syntax matches PHP's REGEX syntax. I started to convert some of my old PHP code to python (due to g's appengine etc.), and now I would like to know whether the regex is 100% convertable, by simple copy & paste. regards,

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• What's a good Wiki that works on Google App Engine

  - by GrantJ

  Hi, I'm interested in using Google App Engine to host a wiki. I've already seen the question here: http://stackoverflow.com/questions/478760/what-cms-runs-on-google-app-engine about what's a good cms. That's really too broad for me. On my LAMP server I run dokuwiki and I'd really like something akin for the GAppEngine. Anyone know of something already developed or in development? Thanks, Grant

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• ggplot2 heatmap : how to preserve the label order ?

  - by Tg

  I'm trying to plot heatmap in ggplot2 using csv data following casbon's solution in http://biostar.stackexchange.com/questions/921/how-to-draw-a-csv-data-file-as-a-heatmap-using-numpy-and-matplotlib the problem is x-label try to re-sort itself. For example, if I swap label COG0002 and COG0001 in that example data, the x-label still come out in sort order (cog0001, cog0002, cog0003.... cog0008). Is there anyway to prevent this ? I want to it to be ordered as in csv file thanks pp

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• Reconstructing data from PCAP sniff

  - by Ishi

  Hi everyone !! I am trying to sniff HTTP data through libpcap and get all the http contents (header+payload) after processing the TCP payload. As per my discussion at http://stackoverflow.com/questions/2905430/writing-an-http-sniffer-or-any-other-application-level-sniffer , I am facing problems due to fragmentation - I need to reconstruct the whole stream (or defragment it) to get a complete HTTP packet, and this is where I need some help. Thanks in anticipation !!

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• selecting the pixels from an image in opencv

  - by ajith

  hi everyone, this is refined version of my previous question http://stackoverflow.com/questions/2602628/computing-matting-laplacian-matrix-of-an-image actually i want to do following operation... summation for all k|(i,j)?wk [(Ii-µk)*(Ij-µk)]...where wk is 3X3 window & µk is mean of wk...here i dont know how to select Ii & Ij separately from an image which is 2 dimensional[Iij]...or does the eqn means anything else??please someone help me..

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• Codeigniter multilanguage and adding the language to the url for seo

  - by Jayapal Chandran

  Hi, I read this http://stackoverflow.com/questions/1328420/the-best-way-to-make-codeigniter-website-multi-language-calling-from-lang-arrays for language inclusion... i wonder how the url will appear for multi languages... How to show the language in url so that it will also be indexed in search engines... for example sitenameDOTcom/es or sitenameDOTcom/whoweare/es or something like this and how to sync with the controllers and the urls...

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• cancel stream request from WCF server to client

  - by ArsenMkrt

  Hi, I posted about stream request here [wcf-chunk-data-with-stream]:http://stackoverflow.com/questions/853448/wcf-chunk-data-with-stream I solved that task but now when i close request in client part server continue to send data. is it possible to cancel stream request from WCF server to client?

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• Using OpenID as the only authentication method

  - by iconiK

  I have read the other questions and they mostly talk about the security of doing so. That's not entirely my concern, mostly because the website is question is a browser-based game. However, the larger issue is the user - not every user is literate enough to understand OpenID. Sure RPX makes this pretty easy, which is what I'll use, but what if the user does not have an account at Google or Facebook or whatever, or does not trust the system to log in with an existing account? They'd have to get an account at another provide - I'm sure most will know how to do it, let alone be bothered to do it. There is also the problem of how to manage it in the application. A user might want to use multiple identities with a single account, so it's not as simple as username + password to deal with. How do I store the OpenID identities of a user in the database? Using OpenID gives me a benefit too: RPX can provide extensive profile information, so I can just prefill the profile form and ask the user to edit as required. I currently have this: UserID Email ------ --------------- 86000 [email protected] 86001 [email protected] UserOpenID OpenID ---------- ------ 86000 16733 86001 16839 86002 19361 OpenID Provider Identifier ------ -------- ---------------- 16733 Yahoo https:\\me.yahoo.com\bob#d36bd 16839 Yahoo https:\\me.yahoo.com\bigbobby#x75af 19361 Yahoo https:\\me.yahoo.com\alice#c19fd Is that the right way to store OpenID identifiers in the database? How would I match the identifier RPX gave me with one in the database to log in the user (if the identifier is known). So here are concrete questions: How would I make it accessible to users not having an OpenID or not wanting to use one? (security concerns over say, logging in with their Google account for example) How do I store the identifier in the database? (I'm not sure if the tables above are right) What measures do I need to take in order to prevent someone from logging in as another user and happily doing anything with their account? (as I understand RPX sends the identifier via HTTP, so what anyone would have to do is to just somehow grab it then enter it in the "OpenID" field) What else do I need to be aware of when using OpenID?

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• Is possible to integrate elmah with wf-wcf services using web.config?

  - by tartafe

  Hi, i'm developing an enterprise application using asp.net mvc, wf-wcf services and normal wcf. I want use a unique point of view of unmanaged exception and my problem is integrate wf-wcf services with ELMAH. The problem is that in wf-wcf i can't decorate di class with the elmah attribute so i make that using web.config if is possible. Someone can help me? (here is a discussion how integrate elmah with wcf using attribute http://stackoverflow.com/questions/895901/exception-logging-for-wcf-services-using-elmah) thanks in advance F.

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• How to use Django with GWT ?

  - by Mononofu

  So I know that I can communicate between those two using JSON, but I also know that I would have to manually recreate all Django objects in JS. Do you know of any tool or library that could help me do that? Or maybe even a better way of achieving the same goal? I only found these two: http://palantar.blogspot.com/2006/06/agad-tutorial-ish-sort-of-post.html http://stackoverflow.com/questions/990319/django-gwt-or-jquery But then I still would have to manually mirror my objects, which would violate DRY.

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• Non RBAC User Roles and Permissions System: a role with properties

  - by micha12

  We are currently designing a User Roles and Permissions System in our web application (ASP.NET), and it seems that we have several cases that do no fit within the classical Role-Based Access Control (RBAC). I will post several questions, each devoted to a particular case. This is my second question (the first question is here: http://stackoverflow.com/questions/2839797/non-rbac-user-roles-and-permissions-system-checking-the-users-city). We have the following case: we need to implement a Manager role in our web application. However, a Manager can belong to one or several companies (within a big group of companies for which we are creating this web app). Say, there can be “Manager of companies A and B”, “Manager of company C”, etc. Depending on the companies that the Manager belongs, he has access to certain operations: for example, he can communicate with clients only of those companies that he belongs to. That is, “Manager of companies A and B” can only have contacts with clients of companies A and B, and not with those of company C. He can also view clients’ details pages of companies A and B and not of C, etc. It seems that this case falls within the RBAC. However, this is not really the case. We will need to create a ManagerRole class that will have a Companies property – that is, this will not be just a role as a collection of permissions (like in the classical RBAC), but a role with properties! This was just one example of a role having properties. There will be others: for example, an Administrator role that will also belong to a number of companies and will also have other custom properties. This means that we will a hierarchy or roles classes: class Role – base class class ManagerRole : Role List Companies class AdministratorRole : Role List Companies Other properties We investigated pure RBAC and its implementation in several systems, and found no systems featuring a hierarchy or roles, each having custom properties. In RBAC, roles are just collections of permissions. We could model our cases using permission with properties, like ManagerPermission, AdministratorPermission, but this has a lot of drawbacks, the main being that we will not be able to assign a role like “Manager of Companies A and B” to a user directly, but will have to create a role containing a ManagerPermission for companies A and B… Moreover, a "Manager" seems to be rather a "role" (position in the company) rather than a "permission" from the linguistic point of view. Would be grateful for any ideas on this subject, as well as any experience in this field! Thank you.

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• Best SVN Tools

  - by pete blair

  Just wanted to see what tools for SVN people use, perhaps i can find some new cool ones. Im pretty much standard right now, ankh and tortoise. See also http://stackoverflow.com/questions/372687/good-visual-studio-svn-tool

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• How can a not null constraint be dropped?

  - by Tomislav Nakic-Alfirevic

  Let's say there's a table created as follows: create table testTable ( colA int not null ) How would you drop the not null constraint? I'm looking for something along the lines of ALTER TABLE testTable ALTER COLUMN colA DROP NOT NULL; which is what it would look like if I used PostgreSQL. To my amazement, as far as I've been able to find, the MySQL docs, Google and yes, even Stackoverflow (in spite of dozens or hundreds of NULL-related questions) don't seem to lead towards a single simple SQL statement which will do the job.

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