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• Strange declaration(templates). C++

  - by atch

  Hi, guys could anyone explain to my like to a not very inteligent child what is declared here: (this is taken from another post on this forum) template<typename C> static char (&f(ChT<int Fallback::*, &C::x>*))[1]; how I read it is: template of static function f called with (ChT*) but then I can't make sense why is there address of operator and why is there array? When explaining please picture not very inteligent child and then try to make it clear to it. Thanks for any help

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• How powerbuilder's datawindow executes insert command

  - by Archangel

  I am new to powerbuilder and having a lot of trouble using datawindows. I can't get my head around the insert mechanism of it. Can someone explain it to me, or at least point me in the right direction(article, tips etc...) ?

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• XOR swap algorithm in python?

  - by TheMachineCharmer

  I tried to implement XOR sort in python. x,y= 10,20 x,y,x = x^y,x^y,x^y print('%s , %s'%(x,y)) OUTPUT: 30 , 30 I am not new to python but I am unable to explain this output. It should have been 20,10. What is going on under the hood?

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• How can I build multiple processes with TBB?

  - by Jackie

  Now I plan to parallelize my sequential solver. I hope I could run several copies of my solver(maybe with different parameters) in parallel simultaneously on a multi-core computer. can I do this with TBB? The reason I ask this question is that the book says: do not introduce anything in your code that will not allow single-thread execution. Any experts can explain this issue? Thanks.

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• lift `??` construct and maven example

  - by coubeatczech

  Hi, I have browsed lift's MegaProtoUser and encountered this construction: ??("Last Name"). Can anyone explain, what that means? Also, I didn't find a way how to add a custom field into MegaProtoUser. The maven's lift's basic archetype defines another field, but it never shows anywhere. (Version 1.0) Thanks for answering

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• Compare equality of char[] in C

  - by rksprst

  I have two variables: char charTime[] = "TIME"; char buf[] = "SOMETHINGELSE"; I want to check if these two are equal... using charTime == buf doesn't work. What should I use, and can someone explain why using == doesn't work? Would this action be different in C and C++?

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• A DLL with WinForms that can be launched from A main app

  - by BDotA

  Hi all. I have created a C# DLL that has some forms in it. ( I needed it to be a DLL, not a Windows Application.) How can I run it as a Windows App? Should I create another app and load it? How? What do I need to learn to do that? please let me know if I should explain more about my question.

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• What are the layers of N-tier structure and their functions for WEB Development in PHP?

  - by Starx

  Can anyone can tell me the N-tier Structure used in Web Programming? Primarily, in 3 tier structure one is presentation layer, another is business logic layer and last is database access layer. But for N-tier or 4 tier structure what are the layers and what sort of functions do they hold on them? Please explain me with a brief example of each.

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• Domain policy template won't show any controls

  - by Kingnebula

  I have the following code that i found on the net. The problem is that it adds in nicely with the group policy editor and i can see it's Catogary under administrative controls but it doesn't show any controls for user input. What am i doing wrong here? CLASS USER category EmailStationary POLICY "SetEmailStationary" EXPLAIN "This policy sets the value for stationary" KEYNAME "Software\Microsoft\Office\11.0\Common\MailSettings" PART "What is the new stationary to use" EDITTEXT VALUENAME "NewStationery" END PART END POLICY END category

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• MySQL - Fulltext Index Search Issue

  - by RC

  Hi all, Two rows in the my database have the following data: brand | product | style ================================================= Doc Martens | Doc Martens 1460 Boots | NULL NewBalance | New Balance WR1062 SG Width | NULL Mininum word length is set to 3, and a FULLTEXT index is created across all the three columns above. When I run a search for IS BOOLEAN matches for +doc in the index, I get the first row returned as a result. When I search for +new, I get no results. Can someone explain why? Thanks.

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• Android Respond To URL in Intent

  - by Isaac Waller

  I want my intent to be launched when the user goes to a certain url: for example, the android market does this with http://market.android.com/ urls. so does youtube. I want mine to do that too. If anybody could explain this, thank you very much. Isaac Waller

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• iPad App Cookies Storage?

  - by Aakburns

  Hi, I have an application that sends you to one website that shows a login form. I've read up on cookies from the apple reference (http://developer.apple.com/iphone/library/documentation/Cocoa/Reference/Foundation/Classes/NSHTTPCookie_Class/Reference/Reference.html#//apple_ref/occ/instm/NSHTTPCookie/initWithProperties:) I'm honestly just not understanding this at all. Can someone please explain how to get cookies working for an app? Post sample code? Thanks.

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• Microsoft Ajax Minifier and NAnt

  - by Vinblad

  Hi folks! Could someone explain to me how to use the Microsoft Ajax Minifier from a nant-script as a nant-task. I've seen examples of how to use it in Visual Studio but I would like the minification to be done on our CI-server.

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• "Closures are poor man's objects" - What does this mean?

  - by Rahul G

  Closures are poor man's objects and vice versa. I have seen this statement at many places on the web (including SO) but I don't quite understand what it means. Could someone please explain what it exactly means? If possible, please include examples in your answer. Thanks.

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• Ad banners in iPhone Application

  - by Krishnan

  I am developing an iPhone App. How can I add Ad banners in my iPhone Application? Could some one explain how the entire system works?(revenue collection). Please some one give me the full details?

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• How do URL shortening service earn?

  - by Rakesh Juyal

  Yesterday i got to know about one more URL shortening service Saf.li. I think there are hundreds of websites offering such service. I always wonder how do such sites earn? After all they need money to host their data and code. Also, i really don't understand why techcrunch said this:- http://techcrunch.com/2009/03/30/if-bitly-is-worth-8-million-tinyurl-is-worth-at-least-46-million/ Is there any one who can explain me this?

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• Oracle "Partition By" Keyword

  - by Nalandial

  Can someone please explain what the "partition by" keyword does and give a simple example of it in action, as well as why one would want to use it? I have a SQL query written by someone else and I'm trying to figure out what it does. An example of partition by: SELECT empno, deptno, COUNT(*) OVER (PARTITION BY deptno) DEPT_COUNT FROM emp The examples I've seen online seem a bit too in-depth. Thanks in advance!

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• What is Crossover Probability & Mutation Probability in Genetic Algorithm or Genetic Programming ?

  - by Reddy

  What is Crossover Probability & Mutation Probability in Genetic Algorithm or Genetic Programming ? Please explain them from implementation perspective!

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• PNG with older browsers not looking good, iepngfix needed?

  - by Chris

  Hi, I have made some screenshots of my website, and in internet explorer 6 my website looks crappy (see screenshot) I have heard something about a PNG fix, is a PNG fix the way to solve the crappy look? and can someone explain me how to implement this?

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• What is the difference between Progressive Enhancement and Graceful Degradation?

  - by zeckdude

  I'm confused on what the difference is between Progressive Enhancement and Graceful Degradation. To me they seem like the same thing. Can you please explain to me the differences between the two and in which situation I would use one over the other?

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• Why doesn't git commit -a add new files?

  - by splintor

  I'm a bit new to git, and I fail to understand why git commit -a only stages changed and deleted files but not new files. Can anyone explain why is it like this, and why there is no other commit flag to enable adding files and committing in one command? BTW, hg commit -A adds both new and deleted files to the commit

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• JFace label provider overview

  - by JesperE

  Is there any good overview of the JFace label provider framework? The JFace snippets doesn't really explain the relationship between the different generations (pre-3.2, 3.3, 3.4, etc.)

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• What is JAF? What is its purpose?

  - by Manoj

  Hi All, I am unable to understand the purpose of JAF(java activation Framework). Please explain me in simple terms or else where can i find simple material to learn. In Java Mail API, they are using JAF. I read, it was like finding the supporting data types of an object. But i couldn't understand. Please teach me!!

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• dynamically load PHP code from external file

  - by jera

  code is in a static class in an external file eg. /home/test/public_html/fg2/templatecode/RecordMOD/photoslide.mod how do I load this into my script on demand, and be able to call its functions ? I am a novice at php , so please explain your code. help is appreciated. Jer

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• How the CppUnit will handles the exception.

  - by avinash

  hi, I know that CppUnit will handle the exceptions through : CPPUNIT_ASSERT_THROW(expression,ExceptionType); can any body explain theoritically about how CppUnit will handle the exception.

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