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• Advice for keeping large C++ project modular?

  - by Jay

  Our team is moving into much larger projects in size, many of which use several open source projects within them. Any advice or best practices to keep libraries and dependancies relatively modular and easily upgradable when new releases for them are out? To put it another way, lets say you make a program that is a fork of an open source project. As both projects grow, what is the easiest way to maintain and share updates to the core? Advice regarding what I'm asking only please...I don't need "well you should do this instead" or "why are you"..thanks.

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• How to run a jar file in hadoop

  - by Arihant

  I have created a jar file using the java file from this blog using following statements javac -classpath /usr/local/hadoop/hadoop-core-1.0.3.jar -d /home/hduser/dir Dictionary.java /usr/lib/jvm/jdk1.7.0_07/bin/jar cf Dictionary.jar /home/hduser/dir Now i have tried running this jar in hadoop by hit and trial of various commands 1hduser@ubuntu:~$ /usr/local/hadoop/bin/hadoop jar Dictionary.jar Output: Warning: $HADOOP_HOME is deprecated. RunJar jarFile [mainClass] args... 2.hduser@ubuntu:~$ /usr/local/hadoop/bin/hadoop jar Dictionary.jar Dictionary Output: Warning: $HADOOP_HOME is deprecated. Exception in thread "main" java.lang.ClassNotFoundException: Dictionary at java.net.URLClassLoader$1.run(URLClassLoader.java:366) at java.net.URLClassLoader$1.run(URLClassLoader.java:355) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:354) at java.lang.ClassLoader.loadClass(ClassLoader.java:423) at java.lang.ClassLoader.loadClass(ClassLoader.java:356) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:264) at org.apache.hadoop.util.RunJar.main(RunJar.java:149) How can i run the jar in hadoop? I have the right DFS Locations as per needed by my program.

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• Application.Idle causes high CPU usage

  - by Neal

  Hello, I use the Application.Idle event to handle toolbar status (enable/disable) etc. quite extensively. As I'm beta testing Norton AntiVirus 2011, it brought to my attention that my app that I'm developing triggered a high CPU usage warning on at least one CPU. Sure enough, I opened the task manager and watched one of the four CPU's (quad core system) go to near 100%. I thought Application.Idle was the way to handle things when the application wasn't performing CPU tasks. Why is Application.Idle spiking the CPU? Here is how I attach to the event: AddHandler Application.Idle, AddressOf OnAppIdle Been using Application.Idle for a long time, never knew it would have this issue. Using VS 2010 .NET 4 Thank you.

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• date picker in partial views asp.net mvc

  - by Renu123

  i used basic date picker in asp.net mvc and it works fine but now i converted my views in partial views at this time date is not working at all means nothing is displyed when i clicked in text box of date picker. the code that i have used is <script src="../Scripts/jquery-1.3.2.js" type="text/javascript"></script> <script src="../Scripts/ui.core.js" type="text/javascript"></script> <script src="../Scripts/ui.datepicker.js" type="text/javascript"></script> and the method used for it is <script type="text/javascript"> $(document).ready(function() { $("#txtTransationDate").datepicker(); }); </script> <input id="txtTransationDate" name="txtTransationDate" type="text" /> can you tell me how to display date picker in partial views. thanks.......

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• Java threads problem

  - by MyNameIs

  Hi! I have a problem with java threads: public class MyClass{ public void Core(){ runTools(); //here I would like to call runTools() method } public void runTools(){ final String run_tool ="cmd.exe /C sources.exe"; Runnable doRun = new Runnable() { public void run() { try { Process tool_proc = Runtime.getRuntime().exec(run_tool); } catch (IOException e) { e.printStackTrace(); } } }; Thread th = new Thread(doRun); th.start(); } } If I do this, then I don't know why, but the thread doesn't work. Please give me some ideas to create a thread. I have already been seen lots of examples, but I should some code such as my example here. Thanks!

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• How to go about with real GUI development with Java Swing and MVC.

  - by Myth17

  I am creating a Blackjack Card game emulator. I am a SCJP,familiar with Core Java concepts. I have a very basic understanding of Java swings and awt. Already finished writing the basic game logic,a CLI logic. My design includes several classes like, Dealer,Player,Table,Card,Casino and some others.. Enums for Cards and suite. I have read about MVC as a theoretical concept, familiar with the name 'design patters'(no understanding whatsoever as to how they are implemented) Everywhere I am suggested to learn while writing some real code.So I started off with this... I am stuck now, how should I go about writing code for my project?? Writing the GUI code and organising it within the already existent code.

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• Cloud sync between iPad/iPhone app

  - by Macatomy

  I have a Core Data app that will end up being an iPhone/iPad universal application. I would like to implement cloud syncing so that an iPhone and an iPad both running the app could share data. I'm planning to use the recently released Dropbox API. Does anyone have any thoughts on the best way to go about doing this? The Dropbox API allows for apps to store files on the cloud. What I was thinking was to original store the database (sqlite) for the app on the cloud and then download that database, but I then realized that using that method would make it painfully difficult to merge changes (rather than replacing the whole database). Any thoughts are appreciated. Thanks.

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• Quick and dirty way to store NSStrings (or other data) from launch to launch?

  - by Moshe

  I want to allow my user to store custom phrases, to be displayed in an editable UITableView. What's a quick and dirty to store these strings? I'm fairly new at iPhone development. I know about Core Data, but not how to use it. i would stay away form that just for this particular project if possible. Are PLIST files a possibility here? Sample code is appreciated. Thank you.

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• MS SQL Server Job with precise timing

  - by TcKs

  Hi, I have a DB with game data (map, players, etc...) and I have a game core mechanics writen in T-SQL stored procedure. I need process game loop (via the stored procedure) every "X" seconds. I tried used the SQL Job, but when I set the interval to seconds, the SQL server stops responding. If I set the interval greater than one minute, all was ok. I need game loop precise in time, e.g. the game loop will run only once and will be executed every "X" precisely (tolerance should be less than one second). Can I do it with MS SQL Server capabilities? Or should I create a windows service which will repeatly execute game loop procedure? Or should I go another way? Thanks! EDIT: The game loop stored procedure takes less than the interval.

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• Is there a way to make this perl code capture stderr as well as stdout from a tcsh?

  - by mikelong

  open UNIT_TESTER, qq(tcsh -c "gpath $dir/$tsttgt; bin/rununittests"|); while(<UNIT_TESTER>){ reportError($ignore{testabort},$tsttgt,"test problem detected for $tsttgt:$_ ") if /core dumped/; reportError($ignore{testabort},$tsttgt,"test problem detected for $tsttgt:$_ ") if /\[ FAILED \]/; writelog($tsttgt,$_); } close UNIT_TESTER; I have tried to redirect stderr to stdout using this syntax but it didn't work: open UNIT_TESTER, qq(tcsh -c "gpath $dir/$tsttgt; bin/rununittests >& "|); I have also read the discussion on the perl FAQ but that was in relation to bash: http://www.perl.com/doc/FAQs/FAQ/oldfaq-html/Q5.15.html

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• malloc hangs in Linux

  - by Rahul

  I am using Linux on a 16 G with 2 quad core CPU. There are 8 processes which are doing some work (CPU intensive/network i/o). Out of which 4 have a memory leak (These are test conditions so no problem in having leaks here). Total space is occupied by all processes is around 15.4 G only 200 MB is free in system. Things are fine for some hours. But after that malloc hangs (for a process which doesn't have a memory leak). Its stuck for for more than 4 minutes (Note CPU is not 100% but io has gone up signficantly). Now there is no problem in the hanged process. (It has not corrupted the memory). What malloc is doing? (is it tryibg to defragment or builidng up swap space).I am using SUSE 10. Any pointers?

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• Java or Groovy CMS

  - by Don

  Hi, I'm considering developing a school information system using the Grails web framework. Before a school can use the system, they will need to setup the following data School data Students Teachers Subjects Classes etc. I'm considering using a CMS in order to get the ability to CRUD these entities "for free". The CMS may also provide other features out-of-the-box that I could use. Ideally the CMS should be implemented in Java or Groovy, does anyone know of something suitable? I looked at the Weceem CMS plugin for Grails, but it's missing some core concepts I need, e.g. the ability to add users to groups. Thanks, Don

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• How can I return something other than an enum from an NServiceBus endpoint exposed as a WCF service?

  - by Todd Stout

  I have a service exposed as WCF via NServiceBus. Ultimately, I'd like to call to this service from silverlight. My WCF Service Interface looks like this: [ServiceContract] public interface ISettingsService { [OperationContract(Action = "http://tempuri.org/IWcfServiceOf_RequestSettingsMessage_SettingsResponseMessage/Process", ReplyAction = "http://tempuri.org/IWcfServiceOf_RequestSettingsMessage_SettingsResponseMessage/ProcessResponse") ] SettingsResponseMessage FetchSettings(RequestSettingsMessage request); } My NSB WCF service is defined as: public class CoreService : WcfService<RequestSettingsMessage, SettingsResponseMessage> { } When I invoke the FetchSettings method on the service, I get an exception: System.TypeInitializationException: The type initializer for 'NServiceBus.WcfSer vice`2' threw an exception. ---- System.InvalidOperationException: Centerlink.Services.Core.Msg.Settings.SettingsResponseMessage must be an enum representing error codes returned by the server. It seems that the WcfService< class is restricting the return type of a WCF method to be an enum. How can I have my service return something other than an enum? Do I need to create a custom implementation of NServiceBus.WcfService<?

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• How to run a recorded (HTML) selenium test from .NET

  - by Gaspar Nagy

  I run Selenium tests with Selenium RC from .NET (c#). In some cases, I would like to keep the test case source as HTML (to be able to modify it from Selenium IDE), but I would like to run/include these tests from my c# unit tests. Maybe it is obvious, but I can't find the API method in the Selenium Core to achieve this. Any idea how to do that? (I think the "includePartial" command in Selenium on Rails does the thing that I would need, but for c#.)

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• highlight scrolling text on iphone(about lyrics show )

  - by ????

  hi all, i'm in troubled show lyrics .i use uitextview show lyrics code snips IBOutlet UILabel *lrcshow; IBOutlet UITextView *showlrc; self.lrcshow.text = [lrcDictss objectForKey:[NSString stringWithFormat:@"%d",(int)self.player.currentTime]]; if (self.lrcshow.text!=nil) { NSRange selection = [self.showlrc.text rangeOfString:self.lrcshow.text]; if( selection.location != NSNotFound ) { showlrc.selectedRange = selection; } } lyrics line by line scrolling show,the problem is now playing(selectedRange) lyric is not highlight, i want this line highlight how can i code ? any suggestion?or use calayer ?cgcontext quartz core instead it? how can i code ? ps.use uitextview show is rigidly ,not smooth! lr style show pic url this is my app style: http://www.flickr.com/photos/53054715@N05/5359722887/ this is good style: flickr.com/photos/53054715@N05/5360345226/

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• SecurityError: Error #2152: Full screen mode is not allowed.

  - by meghana

  I have one flash player , which have full-screen functionality . which is not working in FF and MAC Chrome . and throws an error as below. SecurityError: Error #2152: Full screen mode is not allowed. at flash.display::Stage/set displayState() at com.IQMediaCorp.core::IQMediaCorpPlayer/ToggleFullScreen() I have googled about the issue and already verified some points below my player have allowfullscreen = true in html object / encode element. the methid ToggleFullScreen is an mouse click event below is code for ToggleFullScreen method public function ToggleFullScreen(e:MouseEvent) { if (stage.displayState == StageDisplayState.FULL_SCREEN_INTERACTIVE) { bKnob.alpha=0; bigScreen=true; stage.displayState=StageDisplayState.NORMAL; } else { bigScreen=false; stage.displayState=StageDisplayState.FULL_SCREEN_INTERACTIVE; bKnob.alpha=0; } } i don't get the reason why it is not working. can anybody help?? Thanks

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• Joomla Session Variable as Plugin Parameter

  - by dosboy

  I have a Joomla plugin which takes varying parameters. I need to retrieve one of these parameters from the current session. I've tried using Jumi and a little PHP snipped to retrieve the value and output it in the plugin's parameter list, but the Joomla plugin parser only handles the outter-most set of curly braces. ex. {fabrik view=table id=62 resetfilters=1 fab_tours_ro___tour_id=[tour_id]} [tour_id] I need to retrieve from the current session. I've tried {fabrik view=table id=62 resetfilters=1 fab_tours_ro___tour_id={jumi [scripts/get_tour_id.php]}} In that case the {jumi} tag never gets parsed. I could hack the {fabrik} plugin, but I'd prefer to do this without making any core or component changes, especially since I update Fabrik quite regularly via svn.

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• Are there issues with tables using an autonumber as a primary key in a back-end ms access db?

  - by owlie

  I inherited an MS Access database at my office that is heavily used by several people over the network. This causes many issues with data collisions and locks. I want to split the db so that each user has thier own front-end app and maintain the core data on the server. Several of the tables use an autonumber:sequence:long as thier primary key - in researching how to perform the split I've come across several posts that hint this can cause issues when distributing a database but I haven't been able to find anything solid. The issue seems to be that a user can begin a new record and receive the next autonumber but a second user can create a new record within a short interval and receive the same autonumber resulting in an error? Does Jet handle this correctly or are there autonumber issues with a FE/BE database? If it's an unlikely-but-possile occurance I'm sure it will still be much better than what my users are currently experiencing but I'd like to know if there are ways I can minimize such issues. Thanks for your help!

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• Magento: custom module layout override not working

  - by Socrates

  I have a small custom module which is supposed to show on all product pages, but it doesn't. It only shows when setting its reference to "content", but I want it to display witin the already existing product view divs, thus, display it within the "product.info" reference. Here's my code: app/design/frontend/default/company/layout/company/socialbuttons.xml <?xml version="1.0"?> <layout> <catalog_product_view> <reference name="product.info"> <block type="core/template" name="company_socialbuttons" template="company/socialbuttons.phtml" /> </reference> </catalog_product_view> </layout> I've spent hours finding the error, without success and if I can't find a solution soon I will do it the ugly way (calling the phtml inside the parent phtml). What am I doing wrong?

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• C# asp.net Howto load an aspx page from another project?

  - by Martijn

  I have 2 projects. One project is a core and contains the GUI which is always the same and acts like a kind of framework. The second project is an application that must be set in the framework. The framework consists of a masterpage and a content page (application.aspx). From my second project I want to load the application.aspx. Is this possible? And if so.. how?

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• Is there any advantage to having more than 16gb ram on a Windows Dev machine?

  - by Robert Kozak

  Assuming a machine (Dual Quad Core Xeon (2.26GHz) with 24GB RAM) running Windows Server 2008 and Hyper-V. How many VMs can I expect to run at the same time with good performance. Is this overkill? Can you really have too much RAM? Assuming 2GB per VM thats around 16GB for the VMs with 8GB left over for the Main OS and Hyper-V. Sound about right? Edit: Tried to make the question sound less like bragging. Was never my intention. Its a hard question to write.

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• Simplest LINQ in C# troubleshooting.

  - by Jay

  I'm trying to learn a bit of LINQ but I'm having compile issues right off the bat. Is there any specific reason why this won't work? using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace HelloLINQ { class HelloLINQ { public static void Main() { Example1(); } public static void Example1() { var numbers = new int[] { 1, 5, 3, 7, 3, 8, 9, 3, 6, 6, 2 }; var under5 = from n in numbers select n; foreach (var n in under5) { Console.WriteLine(n); } } } } The error is: Could not find an implementation of the query pattern for source type 'int[]'. 'Select' not found. Are you missing a reference to 'System.Core.dll' or a using directive for 'System.Linq'?

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• Why does Perl complain "Can't modify constant item in scalar assignment"?

  - by joe

  I have this Perl subroutine that is causing a problem: sub new { my $class = shift; my $ldap_obj = Net::LDAP->new( 'test.company.com' ) or die "$@"; my $self = { _ldap = $ldap_obj, _dn ='dc=users,dc=ldap,dc=company,dc=com', _dn_login = 'dc=login,dc=ldap,dc=company,dc=com', _description ='company', }; # Print all the values just for clarification. bless $self, $class; return $self; } what is wrong on this code : i got this error Can't modify constant item in scalar assignment at Core.pm line 12, near "$ldap_obj,"

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• How do I make log4j create log files on demand only?

  - by Mirvnillith

  We have a modular application where modules have their own log4j logs (i.e. communication log and error log). The appenders and categories for these are all configured in the core log4j XML, but not all modules are always installed. The DailyRollingFileAppender creates its file regardless of use and that exposes the full set of modules although not present and as some of them are customer specific we'd like to hide logs not in use. Is there a way to make DailyRollingFileAppender create its file on first use instead of automatically at startup?

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• ModelName(django.contrib.auth.models.User) vs ModelName(models.Model)

  - by amr.negm

  I am developing a django project. I created some apps, some of those are related to User model, for instance, I have a feeds app that handles user feeds, and another app that deals with extra user data like age, contacts, and friends. for each of these, I created a table that should be connected to the User model, which I using for storing and authenticating users. I found two ways to deal with this issue. One, is through extending User model to be like this: ModelName(User): friends = models.ManyToMany('self') ..... Two, is through adding a foreign key to the new table like this: ModelName(models.Model): user = models.ForeignKey(User, unique=True) friends = friends = models.ManyToMany('self') ...... I can't decide which to use in which case. in other words, what are the core differences between both?

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