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• Does Objective-C guarantee the initialization of interface member data?

  - by Stabledog

  In an interface such as this: @interface MyClass : NSObject { bool PlainOldBool; } @end ... does PlainOldBool get auto-initialized to false, or is it necessary to use an init method to do that explicitly?

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• Is the Microsoft Enterprise Library 5.0 Logging Application Block thread safe?

  - by GiddyUpHorsey

  I have some code that will be logging using the Logging Application Block in Enterprise Library 5.0 from different threads. Is the LAB thread safe? Can I log like normal from different threads or will I need to synchronize the logging code so that is only used from one thread at a time?

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• Variable scope difference between PHP and C: block scope is not exactly the same?

  - by powerboy

  The following PHP code will output 3. function main() { if (1) { $i = 3; } echo $i; } main(); But the following C code will raise a compile error. void main() { if (1) { int i = 3; } printf("%d", i); } So variables in PHP are not strictly block-scoped?

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• How can I return something early from a block?

  - by ryeguy

  If I wanted to do something like this: collection.each do |i| return nil if i == 3 ..many lines of code here.. end How would I get that effect? I know I could just wrap everything inside the block in a big if statement, but I'd like to avoid the nesting if possible.

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• Why would I use Dropbox *and* Git for my Emacs initialization file?

  - by Michiel Borkent

  I hear a lot of Emacs users have their init file under git version control and sync the git repository over Dropbox, when they run Emacs on multiple systems. Why would you use git in this situation exactly? Usually checking which system you're on and which things to load and set depending on that can happen in one and the same init file for all systems, right? So, isn't it simply enough to put your init file in a Dropbox directory and load that one directly from Emacs then?

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• What does "Contract can't be in try block" mean?

  - by MatthewMartin

  I'm using the 3.5 library for microsoft code contracts public object RetrieveById(int Id) { Contract.Ensures(newObject != null, "object must not be null"); return newProject; //No error message if I move the Contract.Ensures to here //But it isn't asserting/throwing a contract exception here either } I get the compiler message: "Error 18 Contract section within try block in method 'Controller.RetrieveById(System.Int32)'

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• i want to block my http port using .net application............can anybody help me its urgent plzzzz

  - by prasad

  I want to block port 80 in such a way that whenever user clicks on IE the pop-up window should display to enter required information and once he enter's required information and it is valid then and then only he vl be able to access internet so anybody help me....................using C#.NET

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• Drupal: can I add a block to my View ?

  - by Patrick

  Hi, I was wondering if I can add a block to my a specific view. Apparently I can only add blocks to a "Page" template or to the generic "View template". I actually want to add it to only 1 specific View of my website. thanks

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• Dynamic Object Initialization In JavaScript (just like PHP Reflection allows)?

  - by Gcoop

  Hi All, Using Reflection in PHP I can dynamically create a object like so $target = 'core_domain_Person'; $reflect = new ReflectionClass($target); $obj = $reflect->newInstance(); I would like to replicate this same concept in JavaScript is there a way to do this out of the box? Or is there a way to replicate what Reflection is doing?

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• How to sort this rebol domain names block on date ?

  - by Rebol Tutorial

  I want to sort this block on date column: ["domain1.com" 18-Jan-2011 #"^/" "domain2.com" 20-Aug-2011 #"^/" "domain3.com" 23-Dec-2011 #"^/" "domain4.com" 22-Sep-2011 #"^/"] I can't see how to really do so with sort/skip function explained here, it's not crystal clear for me: http://www.rebol.com/docs/words/wsort.html

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• Django: How can I get a block from a template?

  - by Mark

  Suppose my template has in it something like {% block subject %}my subject{% endblock %} and I load this template with tmpl = loader.get_template('mytemplate.html'), how can I extract "my subject"?

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• How to block form submission when the enter key or return key is pressed?

  - by WillKop

  I have a form that I use JQuery, I don't think I need to put code in this post, the question is pretty basic. But I would like to block the form from submitting when people press the Enter Key or the Return Key. At the same time, I have textareas, where the user will need to be able to press the Enter / Return keys.

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• How to block a IP address using web.xml ?

  - by BrunoLM

  How can I block a ip address with some configuration on web.xml? Do I need a filter? How can I implement one?

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• How can I write a cron job that will block my internet from 7pm to 7am? (So I can get some sleep)

  - by user242065

  I am using OSX 10.6 and it has cron built in. How can I write a cron job that will block my internet from 7pm to 7am every day? Im sure this must be simple but I could only find one example online and it didn't work. It said to: set /etc/hosts.allow flie to be empty set hosts.deny file to ALL : ALL I did this and google still came up.

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• What exactly does an #if 0 ..... #endif block do?

  - by vette982

  In C/C++ What happens to code placed between an #if 0/#endif block? #if 0 //Code goes here #endif Does the code simply get skipped and therefore does not get executed?

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• Is there any way static block is executed more than once? if so then how?

  - by learner

  My Understanding Static block is executed during class loading, If a class is already loaded then there is no way to load the class other than class reloading Doubt/Question 1) Is there any time JVM reloads the class? My Understanding In Class Loading JVM loads source of the Java file, so it can not keep all thousands files source is a memory, it should discard the rarely used code and reload again when it is necessary and during reload JVM is not initializing static variables and locks again(may be using some tracking mechanism) Doubt/Question 2) If my above understanding is incorrect then please correct me

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• How to Block images (img tags) from an iFrame?

  - by ramayac

  Hello, Im searching for ideas to solve the following problem: I'm loading an URL (any for that matter) into an iFrame, and then block (server side) all image tags, o object tags before sending the page to the client. -- What I was thinking to do is: fetching the URL, and then manipulating the fetched content using a Java library (any recomendation on that matter?). And after that, send the modify content to que client. Would that be the best approach to solve this problem? suggestions are wellcome :)

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• C: Why does gcc allow char array initialization with string literal larger than array?

  - by Ashwin

  int main() { char a[7] = "Network"; return 0; } A string literal in C is terminated internally with a nul character. So, the above code should give a compilation error since the actual length of the string literal Network is 8 and it cannot fit in a char[7] array. However, gcc (even with -Wall) on Ubuntu compiles this code without any error or warning. Why does gcc allow this and not flag it as compilation error? gcc only gives a warning (still no error!) when the char array size is smaller than the string literal. For example, it warns on: char a[6] = "Network"; [Related] Visual C++ 2012 gives a compilation error for char a[7]: 1>d:\main.cpp(3): error C2117: 'a' : array bounds overflow 1> d:\main.cpp(3) : see declaration of 'a'

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• How do you align a block item to the right edge of its parent (with CSS)?

  - by George Edison

  I am aware that you can center a block item by setting the left and right margin to auto. However, is it possible to align it to the right edge? And how would this be done? Edit: without using float: right (because it doesn't seem to work, at least not with <ul>'s)

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• I want a feature to temporarly block my website from accessing?

  - by Holicreature

  Hi from time to time , i want to shutdown my site for maintenance ... How could i do this? I've seen a option in phpbb to block the site by admin and then unblock them.. Is there any apis for this or tell me a method of how to do this? I'm using php for my website..

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• How to automatically trigger the App Object initialization in Powerpoint ?

  - by asksuperuser

  It is said here: http://msdn.microsoft.com/en-us/library/aa211599%28v=office.11%29.aspx Before the procedure will run, you must connect the declared object in the class module (App in this example) with the Application object. You can do this with the following code from any module. Dim X As New EventClassModule Sub InitializeApp() Set X.App = Application End Sub Run the InitializeApp procedure. Run HOW ? By hand ? I want it to automatically run when opening the powerpoint rather. Is there any way ?

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• what happens to finally block in the following cases?

  - by GK

  if i have a following code try{ //some code }catch(Exception e){ //some code }finally{ } what happens to the finally block in the following cases if any checked exceptions happen. if System.exit() is called. if any unchecked exceptions happen. if any errors happen.

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• How do I block safari users from my website?

  - by user360322

  I would like to block all users of Safari from visiting my flash game web site. I would like them to see a picture of someone being punched in the face instead of the games. My understanding is that you can use javascript to do it, but I don't want to use some heavy framework like JQuery. Is there a way to do it in like a single line or two of javascript?

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• How to block writing in pipes, until the read has taken place ? (in C)

  - by user492194

  Hi everyone :) I'm currently working on some C program, and I'd like to know if there's any chance to block writing in the writer process (until the read is done) ? i.e. I have 3 pipes between the parent process and the children processes (the parent writes and the children read), I'd like to let the parent to write only to the process that finishes its reading :) I hope it's clear.. Thanks in advance.

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• How much slower is a try/catch block? [closed]

  - by Euclid

  Possible Duplicate: What is the real overhead of try/catch in C#? how much slower is a try catch block than a conditional? eg try { v = someArray[10]; } catch { v = defaultValue; } or if (null != someArray) { v = someArray[10]; } else { v = defaultValue; } is there much in it or isn't there a definative performance differance?

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