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• When we should use pushScene and replaceScene in cocos2d ?

  - by srikanth rongali

  Hi, I cocos2d, I am using pushScene and replaceScene to move to next scene. But, I am confused which we should use? When I am using replaceScene in some places app is crashing and giving errors like -[UITextView length]: unrecognized selector sent to instance 0x842a750 Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[UITextView length]: unrecognized selector sent to instance 0x842a750' But, in my program I am not passing length to UITextView. My program is in this way In scene1 I have UITextView, and I am replacing this scene with scene2. Then -(id)buttonPressed:(id)sender { [description removeFromSuperview]; // It is the textView(description) CCScene *Scene = [CCScene node]; CCLayer *Layer = [scene2 node]; [Scene addChild:Layer]; [[CCDirector sharedDirector] setAnimationInterval:1.0/60]; [[CCDirector sharedDirector] replaceScene: Scene]; } But, when I am using pushScene in presence of replaceScene it is working good. Please clarify me which one should use in which cases ? Thank You

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• Avoiding symbol capture when using macros to generate functions (or other macros)

  - by Rob Lachlan

  I'm a bit confused as to exactly when symbol capture will occur with clojure macros. Suppose that I have a macro which defines a function from keywords. In this trivial example, (defmacro foo [keywd1 keywd2] `(defn ~(symbol (name keywd1)) [~(symbol (name keywd2))] (* 2 ~(symbol (name keywd2))))) I call (foo :bar :baz), and this gets expanded into (defn bar [baz] (* 2 baz)). So now the question -- can this lead to symbol capture? If so, under what circumstances? I know that it's preferred to use gensym (e.g. bar#) to prevent symbol capture, but in some cases (not many, but still) I'd like to have a pretty macro-expansion, without the auto-generated symbols. Bonus question: does the answer change if we are considering a macro that creates macros?

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• How does the same origin policy apply to IP addresses

  - by recipriversexclusion

  I have a server on our company intranet that runs JBoss. I want to send API calls to this server from my machine, also on the intranet, and get the resulting XML responses using JQuery. I read the entry on Wikipedia but am confused how that applies to my situation, since our machines only have IP addresses, not domain names. I have server URL: 10.2.200.3:8001/serviceroot/service client IP address: 10.2.201.217 My questions are: As far as I understand these are different domains, right? So I have to use a proxy to issue JQuery.ajax calls to the server If I want to avoid doing (2), can I install Apache on the server and server the page with JS code form there? But then the JS will be from 10.2.200.3 and the server is at 10.2.200.3:8001. Aren't these considered different domains according to policy? Thanks!

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• Working with expression AST:s

  - by Marcus

  Hi, Is there any best practice when working with AST:s? I have a parsed expression AST. ConstantExpression, BinaryExpression etc. I want to populate a GUI-dialog with information from the AST, and it's here where I get kinda confused because my code gets pretty messy. Example: expression = "Var1 > 10 AND Var2 < 20" I want to populate two textboxes with value 10 resp. 20 from the AST. What I'm doing now is a recursive method that checks for correct child expression-types (with .Net Is-operator) and acts accordingly and the code is really "smelly" :) Is there any design pattern, like Visitor or such, that makes this somewhat easier/more readable/maintainable ?

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• Use of double pointer in linux kernel Hash list implementation

  - by bala1486

  Hi, I am trying to understand Linux Kernel implementation of linked list and hash table. A link to the implementation is here. I understood the linked list implementation. But i am little confused of why double pointers is being used in hlist (**pprev). Link for hlist is here. I understand that hlist is used in implementation of hash table since head of the list requires only one pointer and it saves space. Why cant it be done using single pointer (just *prev like the linked list)? Please help me.

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• Using Sqlite3 with CakePHP

  - by Dan

  Hello, I'm trying to run Sqlite3 with CakePHP. Yes, i know it's not officially supported, but this post here: http://stackoverflow.com/questions/1021980/cakephp-sqlite says it's possible. I've downloaded the new driver file "dbo_sqlite3.7.php" and put it in "cake/libs/model/datasources/dbo". Now I'm having trouble getting connected to the db. Things I'm confused on: Where should my database.sqlite file be kept What should my config file look like. Should I be referencing the full filename of the driver? Like 'driver' = 'dbo_sqlite3.7.php'? And can I use relative paths to the db file? Is there a difference in sqlite3 files and sqlite2 files by themselves, or is it just the way that you handle the files that makes the difference? Thank you for your help. I'm new to cake and I'm excited about learning more.

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• Intellij Grails and Git

  - by WaZ

  I want to backup my code using smart Git. As a start I am a bit confused, IntelliJ has created two folders for my GRails project: these reside in 1) C:\Documents and Settings\me\.grails\1.2.1\projects and 2) C:\Documents and Settings\me\IdeaProjects\ The 1) contains a plugins folder which contains directories and files of plugins I am using inside my project. Do I have to include both 1) and 2) directories inside GIT? If yes what can I ignore? If no which of the files do I have to include Thanks, Much appreciated, WB

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• Mixing regular expression and other conditional expression in a bash if statement

  - by Tassos

  I can't get around this for quite sometime now. As I read along manuals and tutorials I'm getting more confused. I want an if statement with the following logic: if [ -n $drupal_version ] && [[ "$drupal_version" =~ DRUPAL-[6-9]-[1-9][1-9] ]]; then but I can't get it to work properly. When the script is evaluated using the "bash -x ... " script construct, works ok but when is run as a regular script my expression is not evaluated (eventhough the above condition should be met the else part is run). Could you provide any help?

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• Why we used double and triple pointer in objective-C or C language?

  - by Rajendra Bhole

  Hi, I confused when i want to take single pointer and when should i take double pointer? In following structure what exactly did? struct objc_class { Class isa; Class super_class; const char *name; long version; long info; long instance_size; struct objc_ivar_list *ivars; struct objc_method_list **methodLists; struct objc_cache *cache; struct objc_protocol_list *protocols; }; Why we use the "**methodLists" double pointer. Edited int sqlite3_get_table( sqlite3 *db, const char zSql, char **pazResult, int *pnRow, int *pnColumn, char *pzErrmsg ); In above scenario what will be meaning of triple pointer char **pazResult?

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• ASP.NET authentication login and logout with browser back button

  - by Eatdoku

  Hi, I am looking for a solution for user use the browser's back button to navigate to previous page once logged out. I have a web application build in asp.net and using a custom membership provider for authentication and authorization. Everything works fine except when the user click on the logout link to log out of the application and being redirect to a default cover page, if the use click on the BACK BUTTON on their browser, it will actually go back to where they were before and the data will still show up. Of course they can't do anything on that page, click on anything link they will be redirect to a login page again. But having those information display is making a lot users confused. i am just wondering if there is any way i can either clear the browser's history so use can't go BACK, or when they click on the back button and have them redirect to the login page. thanks

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• Using regular expressions to do mass replace in Notepad++

  - by user638820

  I've been trying to replace (and translate) this text, and i don't know what formula I should Use for thousands of places that I need to translate to Spanish. OKay this is what i want to do, i want to use regular expressions on Notepadd++. I give 4 variations, and in bold is what's supposed to go after the name of the place, in lower case and not to be confused with eg. Agency Village because that's its name. Missouri 5,988,927 Adrian City city 1,677 Advance city 1,347 Affton CDP 20,307 Agency Village village 684 Airport Drive village 698 To | [[Adrian City (Misuri)|Adrian City]] || ciudad || 1677 |- | [[Advance (Misuri)|Advance]] || ciudad || 1347 |- | [[Afton (Misuri)|Afton]] || CDP || 20307 |- | [[Agency Village (Misuri)|Agency Village]] || villa || 684 |- | [[Airport Drive (Misuri)|Airport Drive]] || villa || 698

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• Does WCF always use SOAP to send information over your binding?

  - by SLC

  I understand you can choose from a range of bindings, such as TCP, HTTP, HTTPS etc. Am I correct in thinking it always uses SOAP to send data over this connection? I am watching a guide to WCF and it is talking about how exceptions are serialized into SOAP and sent to the client. I would have thought that not all bindings would use SOAP to send data, so I am a bit confused about how it works. Although I understand the fundamentals of WCF, how to set up services and use a proxy on the client, it doesn't seem to have explained exactly how the data is packaged up to send. Perhaps the answer is obvious, that it just uses XML / SOAP, but I would love to know for sure!

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• problem creating object "wscript.shell"

  - by sushant

  my script looks like: Dim WshShell, oExec Set WshShell = CreateObject("WScript.Shell") Set oExec = WshShell.Exec("cmd /c cd D:\d & D: & winzip32.exe -min -a D:\a") Do While oExec.Status = 0 WScript.Sleep 100 Loop WScript.Echo oExec.Status The idea was to use explorer to open these files. The problem I'm having though is on the line: Set WshShell = CreateObject("WScript.Shell") I keep getting the message ActiveX component can't create object: 'WScript.Shell' I'm totally confused because this exact same code runs fine if I write it in a .htm file. Why does my browser treat my .asp page differently than the .html file? How do i fix this problem?

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• What is the difference between an Abstract Syntax Tree and a Concrete Syntax Tree?

  - by Jason Baker

  I've been reading a bit about how interpreters/compilers work, and one area where I'm getting confused is the difference between an AST and a CST. My understanding is that the parser makes a CST, hands it to the semantic analyzer which turns it into an AST. However, my understanding is that the semantic analyzer simply ensures that rules are followed. I don't really understand why it would actually make any changes to make it abstract rather than concrete. Is there something that I'm missing about the semantic analyzer, or is the difference between an AST and CST somewhat artificial?

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• Using a database class in my user class

  - by Josh

  In my project I have a database class that I use to handle all the MySQL stuff. It connects to a database, runs queries, catches errors and closes the connection. Now I need to create a members area on my site, and I was going to build a users class that would handle registration, logging in, password/username changes/resets and logging out. In this users class I need to use MySQL for obvious reasons... which is what my database class was made for. But I'm confused as to how I would use my database class in my users class. Would I want to create a new database object for my user class and then have it close whenever a method in that class is finished? Or do I somehow make a 'global' database class that can be used throughout my entire script (if this is the case I need help with that, no idea what to do there.) Thanks for any feedback you can give me.

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• Array of pointers in objective-c

  - by Justin

  I'm getting confused by pointers in objective-c. Basically I have a bunch of static data in my code. static int dataSet0[2][2] = {{0, 1}, {2, 3}}; static int dataSet1[2][2] = {{4, 5}, {6, 7}}; And I want to have an array to index it all. dataSets[0]; //Would give me dataSet0... What should the type of dataSets be, and how would I initialize it?

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• PHP SimpleXML - Remove xpath node

  - by Peter John

  Hi, I'm a little confused as to how i can delete a parent node of something which i can find via an xpath search: $xml = simplexml_load_file($filename); $data = $xml->xpath('//items/info[item_id="' . $item_id . '"]'); $parent = $data[0]->xpath("parent::*"); unset($parent); So, it finds the item id, no problems there - but the unset isnt getting rid of this <items> node. All i want to do is remove the <items>...</items> for this product. Obviously, there are loads of <items> nodes in the xml file so it cant do unset($xml->data->items) as that would delete everything. Any ideas much appreciated :-)

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• How to import modules that are used in both the main code and a module correctly?

  - by Deniz

  Let's assume I have a main script, main.py, that imports another python file with 'import coolfunctions' and another: 'import chores' Now, suppose coolfunctions also uses stuff from chores, hence I declare 'import chores' inside coolfunctions. Since both main.py, and coolfunctions import chores ~ is this redundant? Is there any other way of doing this? Am I doing it correctly? I'm confused about how python projects should be structured in general. I have a "conf.py" file, that I import for a bunch of variables ~ is this a module or not? I load this conf file in multiple places as well.

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• Sql Server Service Broker Conversation Groups

  - by Brian Hasden

  Can someone explain conversation groups in service broker? Currently, I'm using service broker to send messages from one SQL server to another. On the sending server, I'm trying to correlate the messages so they are processed in serial on the receiving side. Based on the documentation, conversation groups seem to be a perfect fit for this, but on the receiving server, the messages get assigned to a different conversation group from the one I specified when sending the message. I've search around the web and saw that this behavior seems to be intended (http://social.msdn.microsoft.com/forums/en-US/sqlservicebroker/thread/baf48074-6804-43ab-844a-cb28a6dce02b/), but then I'm confused about the usefulness of the syntax from (http://msdn.microsoft.com/en-us/library/ms178624.aspx) WAITFOR( GET CONVERSATION GROUP @conversation_group_id FROM [dbo].[ReceiveQueue] ) If the conversation group doesn't come across with the message from the sender and messages sent with the same conversation group id don't have the same conversation group id on the receive side, what's the point of the code above?

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• Regasm writes mscoree.dll into Registry key InprocServer32

  - by Stiefel

  When I register my .NET Assembly with regasm.exe the registry key HKEY_CLASSES_ROOT\CLSID{111E32AD-4BF8-495F-AB4D-6C61BD463EA4}\InprocServer32 is set to "mscoree.dll". However, I am trying to mimic an existing COM-Server that was written in C. When registering this old COM-server the InprocServer32 is set to the full path to this component. Unfortunately the existing system (a plugin host that I can not change) reads and use this value - an is confused by the "mscoree.dll" value. My solution might be to patch this registry entry manually - but I would like to understand why regasm writes "mscoree.dll" into InprocServer32 .

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• Unix users and permissions and how they interact with web files.

  - by Columbo

  Hello, When you issue the command ls in Linux you get this sort of thing: drwxr--r-- 1 fred editors 4096 drafts -rw-r--r-- 1 fred editors 30405 file1.php -r-xr-xr-x 1 fred fred 8460 file2.php I know that the rwxrwxrwx are the read, write and execute permissions for the current user. And I think I know that 'fred' is the user who owns the file. So I assume fred can write to file1 but no one else can. But what is the extra bit 'editors' and what is the difference between file1 and file2 with respect to one having an ownership of 'fred editors' and the other 'fred fred'? Also if a web user connects to one of the files, what is their user name and where is this decided? If the server decided that user connecting from the web was going to be fred, does this mean any web user could write to file1? Any information welcomed, I am resaerching this but just getting confused. Thanks

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• How can I do a fastAgi to use with Asterisk in Perl

  - by Edwin Jaws

  Hi! I am trying to do an IVR using FAstAGI to say information from my database to my clients. I done AGI doing this but I need now run this from another server, windows server, but I dont know how can I do this. I checked the Asterisk::fastagi module but it is so confused and I dont understand anything. I did a few AGI perl scripts without problem but now I get. If somebody can give me an example to simple script to put me on rigth direction to do that will be so appreciated. Just I need one exmaple and to know if all AGI normal commands from AGI like stream_file are available in fastagi Thks In Advance Edwin Jaws

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• DotNetOpenAuth OpenIdTextBox For Google/Yahoo

  - by user300992

  If I want to integrate DotNetOpenAuth (primary for people to use their Google/Yahoo accounts to login, not act as provider) into my existing site, is this one line control good enough? <rp:OpenIdTextBox ID="OpenIdTextBox1" runat="server" /> Say, if a user wants to login as Google, I can simply set the textbox to "https://www.google.com/accounts/o8/id" and then they can login. I tried it with my Google account, it seems working and I can get the token from HttpContext.Current.User.Identity.Name. Is this "one line" solution secure enough for production? or is it a "must" that I have to use "OpenIdSelector" or "OpenIDLogin" control? I also opened the .net template and some samples, they are very complicated. There are PAPE policies, xrds.aspx (for discovery), ConsumerKey + ConsumerSecret...etc. As a newbie, I am very confused. Any tips on this will be really appreciated. Thanks

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• How does .NET determine the week in a TimeZoneInfo.TransitionTime ?

  - by Travis Brooks

  Greetings I'm trying to do some DateTime math for various time zones and I wanted to take daylight savings into account. Lets say I have a TimeZoneInfo and i've determined the appropriate AdjustmentRule for a given DateTime. Lets also say the particular TimeZoneInfo i'm dealing with is specified as rule.DaylightTransitionStart.IsFixedDateRule == false, so I need to figure out if the given DateTime falls within the start/end TransitionTime.Week values. This is where I'm getting confused, what is .NET considering as a "week"? My first thought was it probably used something like DayOfWeek thisMarksWeekBoundaries = Thread.CurrentThread.CurrentUICulture.DateTimeFormat.FirstDayOfWeek; and went through the calendar assigning days to week, incrementing week every time it crossed a boundary. But, if I do this for May 2010 there are 6 week boundary buckets, and the max valid value for TransitionTime.Week is 5 so this can't be right. Whats the right way to slice up May 2010?

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• Using a datanase class in my user class?

  - by Josh

  In my project I have a database class that I use to handle all the MySQL stuff. It connects to a database, runs queries, catches errors and closes the connection. Now I need to create a members area on my site, and I was going to build a users class that would handle registration, logging in, password/username changes/resets and logging out. In this users class I need to use MySQL for obvious reasons... which is what my database class was made for. But I'm confused as to how I would use my database class in my users class. Would I want to create a new database object for my user class and then have it close whenever a method in that class is finished? Or do I somehow make a 'global' database class that can be used throughout my entire script (if this is the case I need help with that, no idea what to do there.) Thanks for any feedback you can give me.

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