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• performSelector:onThread: when the target thread is blocked

  - by psychotik

  Yes, I'm being lazy. What happens when I call performSelector:onThread:... and pass in a thread that's currently blocked (on synchronous I/O, for instance)? Does the selector just get queued to be executed later?

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• How can I declare a pointer structure?

  - by Y_Y

  This probably is one of the easiest questions ever in C programming language... I have the following code: typedef struct node { int data; struct node * after; struct node * before; }node; struct node head = {10,&head,&head}; Is there a way I can make head to be *head [make it a pointer] and still have the availability to use '{ }' [{10,&head,&head}] to declare an instance of head?

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• Is there a way to force the JVM to run on a single processor or Core.

  - by richs

  In Java, is there a way to force a JVM instance to run on a single CPU/Core. Additionally is there a way for given thread to figure out what CPU it is running on?

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• Checking for nulls in ASP.NET MVC Controllers

  - by Brian McCord

  Another opinion question: What is the proper (in your opinion) to check for nulls in an MVC controller. For instance, if you have an edit controller that fetches a record from the db based on an id, what do you do if that record is not found? I found this article, but I'm not sure I like that method. Do you just check for it with an if statement and redirect to a 404 page? What solution do you use?

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• How to make Shell to allways be on top at runtime in SWT?

  - by parxier

  I'd like to implement "Always on top" configuration option in my application that takes effect immediately. I know that I can call Shell constructor with ON_TOP style. Is there a way to do that at runtime, that is after Shell instance has already been created?

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• How to subtract dates in YYYYMMDD format?

  - by NinjaBomb

  I have 2 integer fields that represent dates in the YYYYMMDD format. What is the best way to subtract 2 of these fields to get the correct # of days between them? For instance, if I take the difference between 20100511 and 20100428 I would like the result to be 13 and not 83. I know I need to convert the integer fields into date formats but everything I have tried either throws an exception or doesn't work correctly. What am I missing? Answers in vb.net please

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• django forms overwrite data when saved

  - by dana

  If a have a form, with the data from a user, let's say a CV, and i save the data from the form into a database, but i don't want that a CV from the same user to be stored in the database more than once(when edited form instance) I want it to be overwritten every time it is saved by one same user. How can i do it? thanks a lot

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• Using the framework of the problems encountered SharpArch

  - by livebean

  I try to test SharpArch frame, directly in the provided example code to write some code to add test data, but unsuccessful, do not have any information to me! ICustomerRepository customerRepository = new CustomerRepository(); Customer customer = new Customer("Jack Chen"); customer.SetAssignedIdTo("JACKK"); customerRepository.Save(customer); I just had an instance of CustomerRepository operation, do not understand why there is no new data on the data table

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• When does the difference between a string and a number matter in Perl 5?

  - by Chas. Owens

  If a string in Perl 5 passes looks_like_number, it might as well be a number. For instance, my $s = "10" + 5; results in $s being assigned 15. Are there any cases where a string does not behave like it's numeric equivalent would have?

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• How to completely ignore linkbreak and tab in RegEx?

  - by Kthurein

  Hi, Is there any way to completely ignore link break and tab characters etc. in RegEx? For instance, the line break and tab characters could be found anywhere and in any order in the content string. ... [CustomToken \t \r\n Type="" \t \r\n Property="" \n /] ... [CT ... The is the RegularExpression that I am currently using: (\[CustomToken).*?(\/\]) .NET API Regex.Matches(string input, string pattern) Thanks for your suggestion.

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• What happens when I instantiate class in Python?

  - by Konstantin

  Could you clarify some ideas behind Python classes and class instances? Consider this: class A(): name = 'A' a = A() a.name = 'B' # point 1 (instance of class A is used here) print a.name print A.name prints: B A if instead in point 1 I use class name, output is different: A.name = 'B' # point 1 (updated, class A itself is used here) prints: B B Even if classes in Python were some kind of prototype for class instances, I'd expect already created instances to remain intact, i.e. output like this: A B Can you explain what is actually going on?

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• How is location accuracy measured in Android?

  - by John Palmer

  Does anyone know the proper interpretation of the accuracy measurements returned by getAccuracy()? For instance, are they calculated as: Circular Error Probability (meaning, if i understand correctly, radius of a 50% confidence circle)? Radius of 95% confidence circle? something else? Many thanks for any advice you can give me.

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• Is there some trick to override a class dynamically in PHP?

  - by user198729

  I have two class named test in two different files,a.php and b.php for instance,the logic is like this: include('a.php'); $a = new test(); if($somcondition_is_met) { include('b.php'); $b = new test(); } Is there some trick to avoid Fatal error: Cannot redeclare class ?

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• PHP ucwords(): Uppercase the first character of each word in a string accept 'and', 'to', etc

  - by lauthiamkok

  hi, How can I make upper-case the first character of each word in a string accept a couple of words which I don't want to transform them, like - and, to, etc? For instance, I want this - ucwords('art and design') to output the string below, 'Art and Design' is it possible to be like - strip_tags($text, '<p><a>') which we allow and in the string? or I should use something else? please advise! thanks.

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• Shopping Cart with multiple orders in ASP

  - by Joao Heleno

  I'm building an e-commerce website in ASP.Net/C# and I'm having some difficulties with my shopping cart... I want my costumers to be able to say "I want X boxes, and each box carries Y items". Let's say, for instance, my website sells flowers. A client logs in and then chooses X bouquets and then for each bouquet he adds flowers from the catalog. Can you point me out some links or tips in order to achieve this behaviour? Thanks

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• Overriding jQuery plugin methods, as default and for single instances

  - by Kilgore2k

  Hi, The basic question is: How do I perform a basic override of a plugin method without editing the original plugin file? Is it possible to create an override for a specific instance: Example: An rtf plugin uses: $('selector').wysiwyg('setContent',newContent); In order to display the rtf text as readonly I would like for the same method to be applied to a div instead of the body of the IFRAME I would like to overwrite the original 'setContent' with my own code, just for this one element. Thanks

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• Why does every third party control set rewrite the basics of ASP.Net?

  - by Earlz

  Of the control sets I've seen for ASP.Net they all exhibit a strange property. They rewrite everything in the ASP.Net control set. For instance both DevExpress and Telerik have their own Panel, Label, and UpdatePanel controls among others. Why do vendors do this? Is it just to create a form of lock in or is it actually necessary?

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• Simulating a missing gem in Ruby unit tests

  - by ktex

  Is there any way to simulate the absence of a gem for certain unit tests, short of actually uninstalling and then reinstalling the gem during testing? I am writing a command line utility, and want to make sure that my tests cover cases where a user may not have all of the gems that I support. For instance, I am using fsevents — a Leopard-specific package for monitoring filesystem events — that will never be present on other systems, as well as a growl gem that's purely optional.

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• Is it possible to use PDT to debug through a tunnel with XDebug?

  - by Craig Gardner

  I'm trying to debug using PDT and Xdebug over a tunnel and haven't been able to get PDT to connect properly. I do not have PHP installed on the machine I am developing on and would like to connect to the XDebug instance that is running on my development machine that is not able to talk directly with my machine.

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• How can I use the compile time constant __LINE__ in a string?

  - by John

  I can use __LINE__ as a method parameter just fine, but I would like an easy way to use it in a function that uses strings. For instance say I have this: 11 string myTest() 12 { 13 if(!testCondition) 14 return logError("testcondition failed"); 15 } And I want the result of the function to be: "myTest line 14: testcondition failed" How can I write logError? Does it have to be some monstrosity of a macro?

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• WPF: How to create a new class of user control in runtime?

  - by Entrase

  Hello! I need to define a user control in runtime and then instantiate it wherever I want. So it should not be just a "new UserControl()" (that will be an instance of a UserControl class) but the one I can use as a template. Should I use reflection to generate new type or is there a better way? Thanks!

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• Pointcut matching methods with annotated parameters

  - by Sinuhe

  I need to create an aspect with a pointcut matching a method if: - Is public - Its class is annotated with @Controller - One of its parameters (can have many) is annotated with @MyParamAnnotation. I think the first two conditions are easy, but I don't know if its possible to accomplish the third with Spring. If it is not, maybe I can change it into: - One of its parameters is an instance of type com.me.MyType (or implements some interface) Do you think it's possible to achieve this? And will performance be good? Thanks

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• Python UTF-8 can't decode byte on 32-bit machine

  - by jsh617

  it works fine on 64 bit machines but for some reason will not work on python 2.4.3 on a 32-bit instance. i get the error 'utf8' codec can't decode bytes in position 76-79: invalid data for the code try: str(sourceresult.sourcename).encode('utf8','replace') except: raise Exception( repr(sourceresult.sourcename ) ) it returns 'kazamidori blog\xf9' i have modified my site.py file to make UTF8 the default encoding, but still doesnt seem to be working.

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• OSX Equivalent of Winsock LSP

  - by Michael

  On Windows, it's possible to program an LSP service on top of Winsock which provides the ability to do a lot of manipulation/etc. with networked applications. For instance, some anti virus applications register an LSP and analyse network traffic that way. Is there a friendly way to accomplish the same sort of thing on OSX?

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• Connect to MySQL via PHP script tunnel

  - by Neo

  Here's the question, I need to connect to a remote MySQL database from my C# Application, problem is the MySQL instance will block all access to all IP's apart from localhost, this can not be changed as its too much of a security issue. The question is, is it possible to connect via a tunnel instead to a php script hosted on the server, this would then act as the mysql connection. Any ideas and suggestions?

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