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• mutation...........

  - by superguay

  Hey everybody, I'm kinda confused..... (define m (list 1 2 3 '(5 8))) (let ((l (cdr m))) (set! l '(28 88))) ==>(1 2 3 (5 8)) (define o (list 1 2 3 '(5 8))) (let ((l (cdr o))) (set-car! l '(28 88))) ==> (1 (28 88) 3 (5 8)) Why does (set! l '(28 88))) not update m?

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• WPF Best point to udpate a progress bar from backgorundworker

  - by toni

  Hi! I have a task that takes a long time executing. In order to inform about the progress to the user I have a progress bar that I update inside DoWork but I would like anybody tells me if it is the best way to update the progress bar. I have heard that there is a reportprogress event handler but I am confused because I don't know what is the utility of the ReportProgress. Thanks.

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• parse results in MySQL via REGEX

  - by Derek Adair

  Hi, I'm a bit confused on the functionality of the REGEX support for MySQL and I have yet to find a solid example on how to separate a result with REGEX within an sql statement. Example: How could I pull data from a table emails that looks something like... +-------------------------+ |Emails | |-------------------------| |[email protected]| +-------------------------+ and return something through an sql statement that looks like... +------------------------------+ |Username | Domain | TLD | |-----------|------------|-----| |some.email | yourdomain | com | +------------------------------+

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• How to add events that repeat on specific days of the week indefinitely with fullcalendar

  - by sufian

  I see the example for repeating events in the code but I'm confused as to how it works. How would I go about adding an event (adding events as an array for now) which occur every Monday at 4:30pm? I'm trying to use the basicWeek view.

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• running a parallel port controlling program through php.

  - by prateek

  I have a program that is interacting with hardware via parallel port programming. i had compiled it and using its object file to interact with the hardware (a simple led). when i execute it directly on the shell it serves the purpose of glowing the LED but when i execute it using shell_exec() in php the command is executed but unable to interact with the hardware. i am totally confused.. .

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• How build a global function to have the recent background-Positions for continue animation after cha

  - by andi

  Try to find a global function, to get and to put the backgroundPosition-values, but I feel a bit confused. Here is the function: function global_backgroundPosition_Menu(num){ $('#Navigation_1') .css({ backgroundPosition: num + "px 0" }) } /////////////////// An here I want to call and put the function: if ($('#Navigation_1 li.leistungen.active').length != 0){ global_backgroundPosition_Menu(); $('#Navigation_1') .css({ backgroundImage: "url(images/background/menu_highlight_hg.png)", backgroundRepeat: "no-repeat", }) .animate({ backgroundPosition: "30px 0" }) global_backgroundPosition_Menu(30) };

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• Android multiple screen sizes with same density

  - by droidy

  I'm confused regarding the densities. I see that with medium density, the screen resolution could be either 320x480, 480x800, or 480x854. So if I have an image thats 300px wide in the mdpi folder, how is it going to look the same size on all 3 different screen sizes (mainly 320x480 vs the other 2)? And by look the same size, I mean scale to be bigger or smaller depending upon the screen size. Thanks.

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• What does this line of code do?

  - by Sean Martin

  I'm trying to understand what this line does, but being a pretty new Java programmer I am getting a little confused. Any help would be appreciated! JComponent container = menu == null ? popupMenu : menu;

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• Java Static Methods

  - by KP65

  Hello, I am wondering when to use static methods? Say If i have a class with a few getters and setters, a method or two, and i want those methods only to be invokable on an instance object of the class. Does this mean i should use a static method? e.g Obj x = new Obj(); x.someMethod or Obj.someMethod (is this the static way?) I'm rather confused!

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• Android Xperia X10 SoundPool

  - by Gaz

  Hi All, I have had some reports from users of my android app that there is no sound being played on the X10. I'm a bit confused as it works on all other phones that I have tried, Neus One, Hero, Droid. I'm using the SoundPool class to play sounds, has anybody else had similar issues with the X10? Thanks, Gaz

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• Parse error: syntax error, unexpected T_VARIABLE, expecting ',' or ';'

  - by Tom

  Hi, I'm really confused as to why this is kicking up an error? $admin = substr($_SERVER['REQUEST_URI'], 0, 7); $account = substr($_SERVER['REQUEST_URI'], 0, 9); if($admin != '/admin/' || $account != '/account/') { } It is giving this error Parse error: syntax error, unexpected T_VARIABLE, expecting ',' or ';' Why is it doing this? Thanks Tom

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• What is difference between scripting languages and other languages

  - by Mirage

  I am really confused between different types of languages. Can any one guide what are diff types of languages or diff categories. Like some saying python is scripting langauge. Now what does that mean. Are other langueages like php , asp , java not scripting langauges

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• Problem with Couchdb :/

  - by 2x2p1p

  Hi guys. I really tried, tried so hard but i cant understand couchdb :( I must record the contact of several people, should i put every contact in a single document ? codeviewer.org/view/code:df8 Or in different documents ? codeviewer.org/view/code:df9 I confused, can somebody help me ? Thanks.

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• How to create the new QTextDocument from existing widgets???

  - by Tom

  Hi, I'm absolutely confused with how to create the customized QTextDocument. I have the widget QWidget, which consists of some QLabels, QTableWidgets and QWidgets and I want to print it . I decided to create the new QTextDocument and insert in it all the defined widgets. I have already tried QTextCursor-insertBlock and insertText but my problem is how to define QTextBlockFormat or QTextCharFormat and say it, what is its "content", how to insert the widget in it. Can anyone help please? tom

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• What are the differences between currently executing .NET thread and Win32 thread

  - by Ybbest

  I am reading the Asp.net security documentation on msdn.I come across these tow terms and get really confused. # WindowsIdentity = WindowsIdentity.GetCurrent() which returns the identity of the security context of the currently executing Win32 thread. # Thread = Thread.CurrentPrincipal which returns the principal of the currently executing .NET thread which rides on top of the Win32 thread.

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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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• How to create an Array, ArrayList, Stack and Queue in Java?

  - by theband

  I was reading a Java article, but found no differences in the declaration and was confused over. Can anyone list me out this? Added the Article http://www.theparticle.com/javadata2.html

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• Do you use zend tool if using xampp?

  - by Joel

  Like the question asks-I'm getting started with XAMPP, and I'm wanting to do some Zend tutorials, but I'm confused about whether you still use Zend tool to create the file structure as described here: http://akrabat.com/wp-content/uploads/Getting-Started-with-Zend-Framework.pdf or if you do something different in XAMPP? Any ideas or links anyone can point me to? Thanks!

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• how does pipe work

  - by lego69

  hello, explain me please how exactly pipe works, for example I have this snippet of the code set line = ($<) while(${#line} != 0) if(${#line} == 5) then echo line | sort | ./calculate ${1} endif set line = ($<) end I need to choose all rows with 5 words and after sort it and after transfer, but I'm confused, how will it work, first of all 'while' will take all information and after that transfer it to sort, or every iteration 'while' will do sort? thanks in advance

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• ASP.NET event handler basic question

  - by anshu

  Hi, I am confused, wanted to confirm the below statement - We can create multiple event handle method for the same event? I think yes, beacuse it is overloading concept? right? Please correct my understanding or advise. Thanks.

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• How is hashCode() calculated in Java.

  - by Jothi

  What value is hashCode() method is returning in java?. i read that it is an memory reference of an object. when i print hascode value for new Integer(1), its 1. for String(a) - 97. so i confused. is it ascii or what type of value is?

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• How to learn about Threads, Especially in Java.

  - by Javed Ahamed

  I have always been kind of confused by threads, and my class right now makes heavy use of them. We are using java.util.concurrent but I don't even really get the basics. UpDownLatch, Futures, Executors; these words just fly over my head. Can you guys suggest any resources to help learn what I need from the ground up? Thanks a lot in advance!

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• Setting a variable to undefined

  - by AJ

  Hello, I'm a bit confused about Javascript undefined & null. Firstly what does if (!testvar) actually do? Does it test for undefined and null or just undefined? Secondly, once a variable is defined can I clear it back to undefined (therefore deleting the variable). Thirdly, can I pass undefined as a parameter? e.g: function test(var1, var2, var3) { } test("value1", undefined, "value2") Thanks, AJ

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• mysql create procedure script

  - by user293487

  I am a bit confused with mysql create procedure script. My script looks like as follows: DELIMITER // DROP PROCEDURE play; CREATE PROCEDURE play() BEGIN insert into hi (name,id)VALUES ('apple','2010'); END // It does not insert into table hi.

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• sql query to return items based on text and group ID

  - by mattgcon

  I am not sure how to best describe what I am trying to do (or search for it for that matter) but I am going to try. I have a pre-existing query (stored procedure) that returns items based on 3 specific ID's. What I want to do is to be able to reduce the results even further based upon a column within the results having the exact same string. For some reason I am confused about how to do this, I am drawing a complete blank about this. Please help

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