Search Results

Search found 16557 results on 663 pages for 'graph library'.

facebook twitter digg google delicious technorati stumbleupon myspace wordpress linkedin gmail igoogle windows live tumblr viadeo yahoo buzz yahoo mail yahoo bookmarks favorites email print

Page 570/663 | < Previous Page | 566 567 568 569 570 571 572 573 574 575 576 577  | Next Page >

  • Best ways to teach a beginner to program?

    - by Justin Standard
    Original Question I am currently engaged in teaching my brother to program. He is a total beginner, but very smart. (And he actually wants to learn). I've noticed that some of our sessions have gotten bogged down in minor details, and I don't feel I've been very organized. (But the answers to this post have helped a lot.) What can I do better to teach him effectively? Is there a logical order that I can use to run through concept by concept? Are there complexities I should avoid till later? The language we are working with is Python, but advice in any language is welcome. How to Help If you have good ones please add the following in your answer: Beginner Exercises and Project Ideas Resources for teaching beginners Screencasts / blog posts / free e-books Print books that are good for beginners Please describe the resource with a link to it so I can take a look. I want everyone to know that I have definitely been using some of these ideas. Your submissions will be aggregated in this post. Online Resources for teaching beginners: A Gentle Introduction to Programming Using Python How to Think Like a Computer Scientist Alice: a 3d program for beginners Scratch (A system to develop programming skills) How To Design Programs Structure and Interpretation of Computer Programs Learn To Program Robert Read's How To Be a Programmer Microsoft XNA Spawning the Next Generation of Hackers COMP1917 Higher Computing lectures by Richard Buckland (requires iTunes) Dive into Python Python Wikibook Project Euler - sample problems (mostly mathematical) pygame - an easy python library for creating games Create Your Own Games With Python ebook Foundations of Programming for a next step beyond basics. Squeak by Example Recommended Print Books for teaching beginners Accelerated C++ Python Programming for the Absolute Beginner Code by Charles Petzold

    Read the article

  • iPhone Keychain Questions

    - by AO
    Some questions: * Is there some way to view the data present in the iPhone keychain? * The items an application adds, cannot be accessed by any other application, can it? * What is the purpose of the identifier and access group in the initialization? My guess is that the identifier is simply used to find items but I'm a little bit unsure of the access group. If the access group is assigned nil, all applications can access the items? If the access group is assigned X, could the items be accessed by another application with the same string X as access group or what is the purpose of the access group in this case? * Is the data in the keychain removed when the application is removed? If not, how do I achieve that? And finally: I can't get the KeychainItemWrapper (Apple example) to work. I've added the KeychainItemWrapper files to my project and when running it on the phone, an exception is thrown by SecItemAdd, saying that one or more parameters were not valid (result code -50). The code triggering the SecItemAdd follows: KeychainItemWrapper* wrapper = [[KeychainItemWrapper alloc] initWithIdentifier:@"something" accessGroup:@"com.company.whatever"]; [wrapper setObject:@"this is my password" forKey:@"password"]; NSLog(@"Password: %@", [wrapper objectForKey:@"password"]); The code can be found at http://developer.apple.com/iphone/library/samplecode/GenericKeychain/index.html

    Read the article

  • How do you keep all your languages straight?

    - by Chris Blackwell
    I think I'm going a little crazy. Right now, I'm working with the following languages (I was just doing a mental inventory): C++ - our game engine Assembler - low level debugging and a few co-processor specific routines Lua - our game engine scripting language HLSL - for shaders Python - our build system and utility tools Objective C/C++ - game engine platform code for Mac and iPhone C# - A few tools developed in our overseas office ExtendScript - Photoshop exporting tools ActionScript - UI scripting VBScript - some spreadsheet related stuff PHP - some web related stuff SQL - some web and tool related stuff On top of this are the plethora of API's that often have many different ways of doing the same thing: std library, boost, .NET, wxWidgets, Cocoa, Carbon, native script libraries for Python, Lua, etc, OpenGL, Direct3d, GDI, Aqua, augh! I find myself inadvertently conflating languages and api's, not realizing what I'm doing until I get syntax errors. I feel like I can't possibly keep up with it, and I can't possibly be proficient in all of these areas. Especially outside the realm of C++ and Python, I find myself programming more by looking at manuals that from memory. Do you have a similar problem? Ideas for compartmentalizing so you're more efficient? Deciding where you want to stay proficient? Organizational tips? Good ways to remember when you switch from Lua to C++ you need to start using semi-colons again? Rants on how complicated we programmers have made things for ourselves? Any ideas welcome!

    Read the article

  • Grails Mail port configuration

    - by bsreekanth
    Hello, I am trying to send mail through grails mail plugin. I configured according to the documentation, and also followed few blog posts (http://blog.lourish.com/2010/04/02/sending-asynchronous-html-email-in-grails-with-activemq-jms-and-gmail/). That post mention that the closure way of declaring the configuration overrides others, but not true. Anyway I tried both approach, but seems like the port is still use the smtp default one. I get the below exception. exception: org.springframework.mail.MailSendException: Mail server connection failed; nested exception is javax.mail.MessagingException: Could not connect to SMTP host: localhost, port: 25; nested exception is: java.net.ConnectException: Connection refused: connect Now, I wrote a small program directly using the java mail library, and I could send the mail with that. The configuration is shown below. tried additional config "mail.smtp.port":"465"", but no change.. used the parameters mentioned in the above blog post, result same grails { mail { host = "smtp.gmail.com" port = "465" username = "[email protected]" password = "mypwd" props = ["mail.smtp.auth":"true", // "mail.smtp.port":"465", "mail.smtp.socketFactory.port":"465", "mail.smtp.socketFactory.class":"javax.net.ssl.SSLSocketFactory", "mail.smtp.socketFactory.fallback":"false"] } } thanks in advance.. Update: It is not port or firewall config, as when I made a grails application from scratch, and tried with the same config, everything works. Also, asked in grails forum http://grails.1312388.n4.nabble.com/grails-mail-mailSender-does-not-have-config-values-td2237704.html#a2237704 . Hope get a lead to try.

    Read the article

  • The LoadLibraryA method returns error code 1114 (ERROR_DLL_INIT_FAILED) after more than 1000 cycles

    - by Javier
    Hi, I'm programing on C++, I'm using Visual Studio 2008, Windows XP, and I have the following problem: My application, that is a DLL that can be used from Python, loads an external dll, uses the required methods, and then unloads this external Dll. It's working properly, but after more than 1000 cycles the method "LoadLibraryA" returns a NULL reference. The main steps are: HINSTANCE h = NULL; h = LoadLibraryA(dllfile.c_str()); DWORD dw = GetLastError(); The error got is: ERROR_DLL_INIT_FAILED 1114 (0x45A) A dynamic link library (DLL) initialization routine failed. The Dll is unloaded by using the following: FreeLibrary(mDLL); mDLL = NULL; Where mDLL is defined like this: HINSTANCE mDLL; First alternative tried: Just load the Dll only once, and unloaded it when the application ends. This fix the problem but introduces a new one. When the application ends, instead of first executing the DllMain method of my applicaion, wich unloads the external DLL, is executing first the DllMain method of the other Dll. This cause the following error because my application is trying to unload a Dll that was unload by itself previously. "Unhandled exception at 0x04a00d07 (DllName.DLL) in Python.exe: 0xC0000005: Access violation reading location 0x0000006b". Any suggestion will be welcomed. Thanks in advance. Regards.

    Read the article

  • should I use Entity Framework instead of raw ADO.NET

    - by user110182
    I am new to CSLA and Entity Framework. I am creating a new CSLA / Silverlight application that will replace a 12 year old Win32 C++ system. The old system uses a custom DCOM business object library and uses ODBC to get to SQL Server. The new system will not immediately replace the old system -- they must coexist against the same database for years to come. At first I thought EF was the way to go since it is the latest and greatest. After making a small EF model and only 2 CSLA editable root objects (I will eventually have hundreds of objects as my DB has 800+ tables) I am seriously questioning the use of EF. In the current system I have the need many times to do fine detail performance tuning of the queries which I can do because of 100% control of generated SQL. But it seems in EF that so much happens behind the scenes that I lose that control. Article like http://toomanylayers.blogspot.com/2009/01/entity-framework-and-linq-to-sql.html don't help my impression of EF. People seem to like EF because of LINQ to EF but since my criteria is passed between client and server as criteria object it seems like I could build queries just as easily without LINQ. I understand in WCF RIA that there is query projection (or something like that) where I can do client side LINQ which does move to the server before translation into actual SQL so in that case I can see the benefit of EF, but not in CSLA. If I use raw ADO.NET, will I regret my decision 5 years from now? Has anyone else made this choice recently and which way did you go?

    Read the article

  • should I use Entity Framework instead of raw ADO.NET

    - by user110182
    I am new to CSLA and Entity Framework. I am creating a new CSLA / Silverlight application that will replace a 12 year old Win32 C++ system. The old system uses a custom DCOM business object library and uses ODBC to get to SQL Server. The new system will not immediately replace the old system -- they must coexist against the same database for years to come. At first I thought EF was the way to go since it is the latest and greatest. After making a small EF model and only 2 CSLA editable root objects (I will eventually have hundreds of objects as my DB has 800+ tables) I am seriously questioning the use of EF. In the current system I have the need many times to do fine detail performance tuning of the queries which I can do because of 100% control of generated SQL. But it seems in EF that so much happens behind the scenes that I lose that control. Article like http://toomanylayers.blogspot.com/2009/01/entity-framework-and-linq-to-sql.html don't help my impression of EF. People seem to like EF because of LINQ to EF but since my criteria is passed between client and server as criteria object it seems like I could build queries just as easily without LINQ. I understand in WCF RIA that there is query projection (or something like that) where I can do client side LINQ which does move to the server before translation into actual SQL so in that case I can see the benefit of EF, but not in CSLA. If I use raw ADO.NET, will I regret my decision 5 years from now? Has anyone else made this choice recently and which way did you go?

    Read the article

  • MySQL Connection Timeout Issue - Grails Application on Tomcat using Hibernate and ORM

    - by gav
    Hi Guys I have a small grails application running on Tomcat in Ubuntu on a VPS. I use MySql as my datastore and everything works fine unless I leave the application for more than half a day (8 hours?). I did some searching and apparently this is the default wait_timeout in mysql.cnf so after 8 hours the connection will die but Tomcat won't know so when the next user tries to view the site they will see the connection failure error. Refreshing the page will fix this but I want to get rid of the error altogether. For my version of MySql (5.0.75) I have only my.cnf and it doesn't contain such a parameter, In any case changing this parameter doesn't solve the problem. This Blog Post seems to be reporting a similar error but I still don't fully understand what I need to configure to get this fixed and also I am hoping that there is a simpler solution than another third party library. The machine I'm running on has 256MB ram and I'm trying to keep the number of programs/services running to a minimum. Is there something I can configure in Grails / Tomcat / MySql to get this to go away? Thanks in advance, Gav From my Catalina.out; 2010-04-29 21:26:25,946 [http-8080-2] ERROR util.JDBCExceptionReporter - The last packet successfully received from the server was 102,906,722 milliseconds$ 2010-04-29 21:26:25,994 [http-8080-2] ERROR errors.GrailsExceptionResolver - Broken pipe java.net.SocketException: Broken pipe at java.net.SocketOutputStream.socketWrite0(Native Method) ... 2010-04-29 21:26:26,016 [http-8080-2] ERROR util.JDBCExceptionReporter - Already closed. 2010-04-29 21:26:26,016 [http-8080-2] ERROR util.JDBCExceptionReporter - Already closed. 2010-04-29 21:26:26,017 [http-8080-2] ERROR servlet.GrailsDispatcherServlet - HandlerInterceptor.afterCompletion threw exception org.hibernate.exception.GenericJDBCException: Cannot release connection at java.lang.Thread.run(Thread.java:619) Caused by: java.sql.SQLException: Already closed. at org.apache.commons.dbcp.PoolableConnection.close(PoolableConnection.java:84) at org.apache.commons.dbcp.PoolingDataSource$PoolGuardConnectionWrapper.close(PoolingDataSource.java:181) ... 1 more

    Read the article

  • Why is it so difficult to get a working IDE for Scala?

    - by Alex R
    I recently gave up trying to use Scala in Eclipse (basic stuff like completion doesn't work). So now I'm trying IntelliJ. I'm not getting very far. This was the original error. See below for update: Scala signature Predef has wrong version Expected 5.0 found: 4.1 in .... scala-library.jar I tried both versions 2.7.6 and 2.8 RC1 of scala-*.jar, the result was the same. JDK is 1.6.u20. UPDATE Today I uninstalled IntelliJ 9.0.1, and installed 9.0.2 Early Availability, with the 4/14 stable version of the Scala plug-in. Then I setup a project from scratch through the wizards: new project from scratch JDK is 1.6.u20 accept the default (project) instead of global / module accept the download of Scala 2.8.0beta1 into project's lib folder Created a new class: object hello { def main(args: Array[String]) { println("hello: " + args); } } For my efforts, I now have a brand-new error :) Here it is: Scalac internal error: class java.lang.ClassNotFoundException [java.net.URLClassLoader$1.run(URLClassLoader.java:202), java.security.AccessController.doPrivileged(Native Method), java.net.URLClassLoader.findClass(URLClassLoader.java:190), java.lang.ClassLoader.loadClass(ClassLoader.java:307), sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301), java.lang.ClassLoader.loadClass(ClassLoader.java:248), java.lang.Class.forName0(Native Method), java.lang.Class.forName(Class.java:169), org.jetbrains.plugins.scala.compiler.rt.ScalacRunner.main(ScalacRunner.java:72)] Thanks

    Read the article

  • How to link to dynamic boost libs?

    - by testingmysql
    I compiled boost lib and got these. //Shared/dynamic link libraries 24/03/2010 11:25 PM 53,248 boost_thread-vc80-mt-1_42.dll 24/03/2010 11:25 PM 17,054 boost_thread-vc80-mt-1_42.lib 24/03/2010 11:25 PM 17,054 boost_thread-vc80-mt.lib 24/03/2010 11:25 PM 73,728 boost_thread-vc80-mt-gd-1_42.dll 24/03/2010 11:25 PM 17,214 boost_thread-vc80-mt-gd-1_42.lib 24/03/2010 11:25 PM 17,214 boost_thread-vc80-mt-gd.lib // Static libs... does not need any dlls 24/03/2010 11:25 PM 381,716 libboost_thread-vc80-mt-1_42.lib 24/03/2010 11:25 PM 381,716 libboost_thread-vc80-mt.lib 24/03/2010 11:25 PM 999,552 libboost_thread-vc80-mt-gd-1_42.lib 24/03/2010 11:25 PM 999,552 libboost_thread-vc80-mt-gd.lib 24/03/2010 11:25 PM 421,050 libboost_thread-vc80-mt-s-1_42.lib 24/03/2010 11:25 PM 421,050 libboost_thread-vc80-mt-s.lib 24/03/2010 11:25 PM 1,015,688 libboost_thread-vc80-mt-sgd-1_42.lib 24/03/2010 11:25 PM 1,015,688 libboost_thread-vc80-mt-sgd.lib In Visual Studio, I have written a test app using the boost thread library. Based on code generation settings it asks for these four libs only (like multithreading debug, multithreading, multithreading debug dll, and multithreading dll) 24/03/2010 11:25 PM 381,716 libboost_thread-vc80-mt-1_42.lib 24/03/2010 11:25 PM 381,716 libboost_thread-vc80-mt.lib 24/03/2010 11:25 PM 999,552 libboost_thread-vc80-mt-gd-1_42.lib 24/03/2010 11:25 PM 999,552 libboost_thread-vc80-mt-gd.lib 24/03/2010 11:25 PM 421,050 libboost_thread-vc80-mt-s-1_42.lib 24/03/2010 11:25 PM 421,050 libboost_thread-vc80-mt-s.lib 24/03/2010 11:25 PM 1,015,688 libboost_thread-vc80-mt-sgd-1_42.lib 24/03/2010 11:25 PM 1,015,688 libboost_thread-vc80-mt-sgd.lib Now my question is how can I link my app to the other 2 libs so that it uses the dlls? 24/03/2010 11:25 PM 53,248 boost_thread-vc80-mt-1_42.dll 24/03/2010 11:25 PM 17,054 boost_thread-vc80-mt-1_42.lib 24/03/2010 11:25 PM 17,054 boost_thread-vc80-mt.lib 24/03/2010 11:25 PM 73,728 boost_thread-vc80-mt-gd-1_42.dll 24/03/2010 11:25 PM 17,214 boost_thread-vc80-mt-gd-1_42.lib 24/03/2010 11:25 PM 17,214 boost_thread-vc80-mt-gd.lib Question 2. What does the g, s stands for?

    Read the article

  • How do I copy a python function to a remote machine and then execute it?

    - by Hugh
    I'm trying to create a construct in Python 3 that will allow me to easily execute a function on a remote machine. Assuming I've already got a python tcp server that will run the functions it receives, running on the remote server, I'm currently looking at using a decorator like @execute_on(address, port) This would create the necessary context required to execute the function it is decorating and then send the function and context to the tcp server on the remote machine, which then executes it. Firstly, is this somewhat sane? And if not could you recommend a better approach? I've done some googling but haven't found anything that meets these needs. I've got a quick and dirty implementation for the tcp server and client so fairly sure that'll work. I can get a string representation the function (e.g. func) being passed to the decorator by import inspect string = inspect.getsource(func) which can then be sent to the server where it can be executed. The problem is, how do I get all of the context information that the function requires to execute? For example, if func is defined as follows, import MyModule def func(): result = MyModule.my_func() MyModule will need to be available to func either in the global context or funcs local context on the remote server. In this case that's relatively trivial but it can get so much more complicated depending on when and how import statements are used. Is there an easy and elegant way to do this in Python? The best I've come up with at the moment is using the ast library to pull out all import statements, using the inspect module to get string representations of those modules and then reconstructing the entire context on the remote server. Not particularly elegant and I can see lots of room for error. Thanks for your time

    Read the article

  • How to manage Javascript modules in django templates?

    - by John Mee
    Lets say we want a library of javascript-based pieces of functionality (I'm thinking jquery): For example: an ajax dialog a date picker a form validator a sliding menu bar an accordian thingy There are four pieces of code for each: some Python, CSS, JS, & HTML. What is the best way to arrange all these pieces so that: each javascript 'module' can be neatly reused by different views the four bits of code that make up the completed function stay together the css/js/html parts appear in their correct places in the response common dependencies between modules are not repeated (eg: a javascript file in common) x-------------- It would be nice if, or is there some way to ensure that, when called from a templatetag, the templates respected the {% block %} directives. Thus one could create a single template with a block each for CSS, HTML, and JS, in a single file. Invoke that via a templatetag which is called from the template of whichever view wants it. That make any sense. Can that be done some way already? My templatetag templates seem to ignore the {% block %} directives. x-------------- There's some very relevant gasbagging about putting such media in forms here http://docs.djangoproject.com/en/dev/topics/forms/media/ which probably apply to the form validator and date picker examples.

    Read the article

  • jstl taglib not found, where have I gone wrong?

    - by James.Elsey
    I'm trying to add Google Maps onto my JSPs by using the googlemaps jstl taglib. I've added this into my maven pom <dependency> <groupId>com.lamatek</groupId> <artifactId>googlemaps</artifactId> <version>0.98c</version> <scope>provided<>/scope </dependency> This then included the googlemaps-0.98c library under my project libraries in NetBeans, I right clicked and selected Manually install artifact and located the googlemaps.jar file I had downloaded. I've then added this into my taglibs file <%@taglib prefix="googlemaps" uri="/WEB-INF/googlemaps" %> And have then included this where I actually want to show a map on my jsp <googlemaps:map id="map" width="250" height="300" version="2" type="STREET" zoom="12"> <googlemaps:key domain="localhost" key="xxxx"/> <googlemaps:point id="point1" address="74 Connors Lane" city="Elkton" state="MD" zipcode="21921" country="US"/> <googlemaps:marker id="marker1" point="point1"/> </googlemaps:map> But when I load up my application, I get the following error. org.apache.jasper.JasperException: /jsp/dashboard.jsp(1,1) /jsp/common/taglibs.jsp(6,56) PWC6117: File "/WEB-INF/googlemaps" not found root cause org.apache.jasper.JasperException: /jsp/common/taglibs.jsp(6,56) PWC6117: File "/WEB-INF/googlemaps" not found Have I missed something simple? I'm unable to spot what I've done wrong so far.. Thanks

    Read the article

  • Opening a LWJGL window from a SWT app on Mac

    - by TomA
    I have a SWT app that opens a OpenGL window (using the LWJGL library) after a button is pressed. Works fine on Windows. On Mac, I get this error: 2010-03-05 02:28:25.315 java[1315:a07] [Java CocoaComponent compatibility mode]: Enabled 2010-03-05 02:28:25.316 java[1315:a07] [Java CocoaComponent compatibility mode]: Setting timeout for SWT to 0.100000 2010-03-05 02:28:25.317 java[1315:a07] Apple AWT Startup Exception : _createMenuRef called with existing principal MenuRef already associated with menu 2010-03-05 02:28:25.318 java[1315:a07] Apple AWT Restarting Native Event Thread The SWT window closes and then the app hangs, with no windows open. It looks like the SWT app doesn't shut down cleanly and leaves it's menu entries associated with it, which prevents the LWJGL window from opening. Mac OS X only wants one application menu. SWT doesn't free it's own menu and LWJGL wants to add another. Facts: A button in the SWT dialog is supposed to close the dialog and open a LWJGL window (org.lwjgl.opengl.Display). The button sets a static variable in the app to tell it what to do next after the SWT window is closed, so the LWJGL window is NOT being opened from a SWT callback directly. The button then closes the SWT window. I don't know the correct way of doing this but tried various combinations of shell.close, shell.dispose, display.close and display.dispose, none of them worked. They all close the window but the error occurs every time. Does anyone know what could be done to make this work?

    Read the article

  • Sort multiple columns while using a bindingsource or bindinglist

    - by JF
    Hi everyone. I have a problem I am trying to fix and it's sorting a DataGridView on multiple columns. I have read that this option is not a feature built-in the DataGridView and I have to implement it. I have found multiple solutions, but none quite got to do the work. I'm also quite a newbie in C# and I don't know much of the .Net library. I have also read on the MSDN site for info on different classes that might be of use, but no success. Now, let's get to the point. I have a DataGridView, with a BindingList (originally, a BindingSource) that I want to sort, but by multiple keys. My DataGrid has 9 columns and the user should be able to sort on any column. For example, let's say my Datagrid has 3 columns, named : Index, ID, Name. The user wants to sort by Name, implicitly, the next order would be Index and then ID. So, in case 2 names are identical, Index should be the next sort option. Any ideas how this can be made?

    Read the article

  • Efficient Multiple Linear Regression in C# / .Net

    - by mrnye
    Does anyone know of an efficient way to do multiple linear regression in C#, where the number of simultaneous equations may be in the 1000's (with 3 or 4 different inputs). After reading this article on multiple linear regression I tried implementing it with a matrix equation: Matrix y = new Matrix( new double[,]{{745}, {895}, {442}, {440}, {1598}}); Matrix x = new Matrix( new double[,]{{1, 36, 66}, {1, 37, 68}, {1, 47, 64}, {1, 32, 53}, {1, 1, 101}}); Matrix b = (x.Transpose() * x).Inverse() * x.Transpose() * y; for (int i = 0; i < b.Rows; i++) { Trace.WriteLine("INFO: " + b[i, 0].ToDouble()); } However it does not scale well to the scale of 1000's of equations due to the matrix inversion operation. I can call the R language and use that, however I was hoping there would be a pure .Net solution which will scale to these large sets. Any suggestions? EDIT #1: I have settled using R for the time being. By using statconn (downloaded here) I have found it to be both fast & relatively easy to use this method. I.e. here is a small code snippet, it really isn't much code at all to use the R statconn library (note: this is not all the code!). _StatConn.EvaluateNoReturn(string.Format("output <- lm({0})", equation)); object intercept = _StatConn.Evaluate("coefficients(output)['(Intercept)']"); parameters[0] = (double)intercept; for (int i = 0; i < xColCount; i++) { object parameter = _StatConn.Evaluate(string.Format("coefficients(output)['x{0}']", i)); parameters[i + 1] = (double)parameter; }

    Read the article

  • How to get correct Set-Cookie headers for NSHTTPURLResponse?

    - by overboming
    I want to use the following code to login to a website which returns its cookie information in the following manner: Set-Cookie: 19231234 Set-Cookie: u2am1342340 Set-Cookie: owwjera I'm using the following code to log in to the site, but the print statement at the end doesn't output anything about "set-cookie". On Snow leopard, the library seems to automatically pick up the cookie for this site and later connections sent out is set with correct "cookie" headers. But on leopard, it doesn't work that way, so is that a trigger for this "remember the cookie for certain root url" behavior? NSMutableURLRequest *request = [[[NSMutableURLRequest alloc] init] autorelease]; [request setURL:[NSURL URLWithString:uurl]]; [request setHTTPMethod:@"POST"]; [request setValue:postLength forHTTPHeaderField:@"Content-Length"]; [request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"]; [request setValue:@"keep-live" forHTTPHeaderField:@"Connection"]; [request setValue:@"300" forHTTPHeaderField:@"Keep-Alive"]; [request setHTTPShouldHandleCookies:YES]; [request setHTTPBody:postData]; [request setTimeoutInterval:10.0]; NSData *urlData; NSHTTPURLResponse *response; NSError *error; urlData = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error]; NSLog(@"response dictionary %@",[response allHeaderFields]);

    Read the article

  • How to avoid coupling when using regions in Composite WPF

    - by emddudley
    I have an application designed using Microsoft's Composite Application Library. My shell has several regions defined so that I can inject content from separate modules. I'm looking for a design pattern that will reduce the coupling that these regions introduce. In all examples I have seen, regions are defined and accessed using a string in a static class in the infrastructure project.: <ItemsControl cal:RegionManager.RegionName="{x:Static inf:RegionNames.TabRegion}"> public static class RegionNames { public const string TabRegion = "TabRegion"; } This introduces an dependency on the shell from the infrastructure project, because the infrastructure project is now defining some of the shell's capabilities. The CAL RegionManager throws an exception if you attempt to access a region which is not defined, so I must ensure that the infrastructure and shell projects are kept in sync. Is there a way to isolate the shell's regions so that they are defined only within the shell (no region names in the infrastructure project)? Is there a way to make regions optional, so that shells can be swapped out even if they don't have all the same regions? (An example: One shell has menu and toolbar regions, another only has the menu... modules should be able to inject into the toolbar if it's available, without failing when it's not)

    Read the article

  • JAXB :Class cast exception while trying to unmarshall XML using JAXB

    - by Navin
    Hi I am novice to JAXB , i am trying to sample using JAXB. trying to dispaly the values in the MenuList.xml ----MenuList.xml----------- Projects Library Library1 ----------------------------MenuList.xsd------------------- The uisng the command I run the xsd file and it generated the classes. MenuList and Object Factory. AppTest.java package com.xx.menu; import java.io.File; import java.io.IOException; import javax.xml.bind.JAXBContext; import javax.xml.bind.JAXBElement; import javax.xml.bind.JAXBException; import javax.xml.bind.UnmarshalException; import javax.xml.bind.Unmarshaller; public class TestNew { /** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub try { JAXBContext jc = JAXBContext.newInstance("com.xx.menu"); //Create unmarshaller Unmarshaller um = jc.createUnmarshaller(); File file = new File ("C:\\sample\\menulist.xml"); JAXBElement element = (JAXBElement)um.unmarshal(file); Menulist menulist= (Menulist) element.getValue (); System.out.println("name : "+menulist.getMenu()); } catch( UnmarshalException ue ) { ue.printStackTrace(); System.out.println( "Caught UnmarshalException" ); } catch( JAXBException je ) { je.printStackTrace(); } catch( Exception ioe ) { ioe.printStackTrace(); } } } Error: java.lang.ClassCastException: com.xx.menu.Menulist at com.xx.menu.TestNew.main(TestNew.java:26) Can you please help me where I am going wrong ...I will be greatly thankful to you. Thanks

    Read the article

  • Accessing Yahoo realtime stock quotes

    - by DVK
    There's a fairly easy way of retrieving 15-minute delayed quotes off of Yahoo! Finance web site ("quotes.csv" API). However, so far I was unable to find any info on how to access real-time quotes. The hang-ups with real-time quotes are: Only available to logged-in user No API Non-obvious how to scrape the info - I'm somewhat convinced they are placed on the page by some weird Ajax call. So I was wondering if anyone had managed to develop a publically available solution to retrieve real-time quotes for a stock from Yahoo! Finance. Notes: Implementation language/framework need is flexible but Perl or Excel is highly preferred. Assume that security is not an issue - I'm willing to supply yahoo userid and pasword, even in cleartext. I'm not 100% hung up on Yahoo - they are merely the only provider of free realtime stock quotes I'm familiar with. if the same thing can be done with Google Finance, I'd be just as happy. This is for a personal project, so scalability/fault tolerance/etc... are not important. I'm looking for a "do the whole retrieval" library ideally, but if I'm pointed to partial solutions (e.g. how to retrieve info from Yahoo's user-logged-in pages; how to scrape realtime quotes from Yahoo's page) I can fill in the blanks. I saw Finance::YahooQuote but it does not seem to allow you to supply log-in information and appears to use the lagging quotes.csv API Thanks!

    Read the article

  • Web-based clients vs thick/rich clients?

    - by rudolfv
    My company is a software solutions provider to a major telecommunications company. The environment is currently IBM WebSphere-based with front-end IBM Portal servers talking to a cluster of back-end WebSphere Application Servers providing EJB services. Some of the portlets use our own home-grown MVC-pattern and some are written in JSF. Recently we did a proof-of-concept rich/thick-client application that communicates directly with the EJB's on the back-end servers. It was written in NetBeans Platform and uses the WebSphere application client library to establish communication with the EJB's. The really painful bit was getting the client to use secure JAAS/SSL communications. But, after that was resolved, we've found that the rich client has a number of advantages over the web-based portal client applications we've become accustomed to: Enormous performance advantage (CORBA vs. HTTP, cut out the Portal Server middle man) Development is simplified and faster due to use of NetBeans' visual designer and Swing's generally robust architecture The debug cycle is shortened by not having to deploy your client application to a test server No mishmash of technologies as with web-based development (Struts, JSF, JQuery, HTML, JSTL etc., etc.) After enduring the pain of web-based development (even JSF) for a while now, I've come to the following conclusion: Rich clients aren't right for every situation, but when you're developing an in-house intranet-based solution, then you'd be crazy not to consider NetBeans Platform or Eclipse RCP. Any comments/experiences with rich clients vs. web clients?

    Read the article

  • What is the scope of CONTEXT_INFO in SQL Server?

    - by JasonS
    I am using CONTEXT_INFO to pass a username to a delete trigger for the purposes of an audit/history table. I'm trying to understand the scope of CONTEXT_INFO and if I am creating a potential race condition. Each of my database tables has a stored proc to handle deletes. The delete stored proc takes userId as an parameter, and sets CONTEXT_INFO to the userId. My delete trigger then grabs the CONTEXT_INFO and uses that to update an audit table that indicates who deleted the row(s). The question is, if two deletes sprocs from different users are executing at the same time, can CONTEXT_INFO set in one of the sprocs be consumed by the trigger fired by the other sproc? I've seen this article http://msdn.microsoft.com/en-us/library/ms189252.aspx but I'm not clear on the scope of sessions and batches in SQL Server which is key to the article being helpful! I'd post code, but short on time at the moment. I'll edit later if this isn't clear enough. Thanks in advance for any help.

    Read the article

  • Send Data Using the WebRequest Class to DotNetOpenAuth website

    - by Denis
    I am trying to send data to DotNetOpenAuth website as described here http://msdn.microsoft.com/en-us/library/debx8sh9.aspx Sender receive (500) Internal Server Error. The same code for blank website without DotNetOpenAuth works fine. Should I tweak something? Here is an exception: System.ArgumentNullException was unhandled by user code Message="Value cannot be null.\r\nParameter name: key" Source="mscorlib" ParamName="key" StackTrace: at System.ThrowHelper.ThrowArgumentNullException(ExceptionArgument argument) at System.Collections.Generic.Dictionary`2.Insert(TKey key, TValue value, Boolean add) at System.Collections.Generic.Dictionary`2.Add(TKey key, TValue value) at DotNetOpenAuth.OAuth.ChannelElements.OAuthChannel.ReadFromRequestCore(HttpRequestInfo request) in c:\BuildAgent\work\7ab20c0d948e028f\src\DotNetOpenAuth\OAuth\ChannelElements\OAuthChannel.cs:line 145 at DotNetOpenAuth.Messaging.Channel.ReadFromRequest(HttpRequestInfo httpRequest) in c:\BuildAgent\work\7ab20c0d948e028f\src\DotNetOpenAuth\Messaging\Channel.cs:line 372 at DotNetOpenAuth.OAuth.ServiceProvider.ReadRequest(HttpRequestInfo request) in c:\BuildAgent\work\7ab20c0d948e028f\src\DotNetOpenAuth\OAuth\ServiceProvider.cs:line 222 Exception occurs on last line of the code: private void context_AuthenticateRequest(object sender, EventArgs e) { // Don't read OAuth messages directed at the OAuth controller or else we'll fail nonce checks. if (this.IsOAuthControllerRequest()) { return; } if (HttpContext.Current.Request.HttpMethod != "HEAD") { // workaround: avoid involving OAuth for HEAD requests. IDirectedProtocolMessage incomingMessage = OAuthServiceProvider.ServiceProvider.ReadRequest(new HttpRequestInfo(this.application.Context.Request));

    Read the article

  • ICollectionView.SortDescriptions sort does not work if underlying DataTable has zero rows

    - by BigBlondeViking
    We have a WPF app that has a DataGrid inside a ListView. private DataTable table_; We do a bunch or dynamic column generation ( depending on the report we are showing ) We then do the a query and fill the DataTable row by row, this query may or may not have data.( not the problem, an empty grid is expected ) We set the ListView's ItemsSource to the DefaultView of the DataTable. lv.ItemsSource = table_.DefaultView; We then (looking at the user's pass usage of the app, set the sort on the column) Sort Method below: private void Sort(string sortBy, ListSortDirection direction) { ICollectionView dataView = CollectionViewSource.GetDefaultView(lv.ItemsSource); dataView.SortDescriptions.Clear(); var sd = new SortDescription(sortBy, direction); dataView.SortDescriptions.Add(sd); dataView.Refresh(); } In the Zero DataTable rows scenario, the sort does not "hold"? and if we dynamically add rows they will not be in sorted order. If the DataTable has at-least 1 row when the sort is applied, and we dynamically add rows to the DataTable, the rows com in sorted correctly. I have built a standalone app that replicate this... It is an annoyance and I can add a check to see if the DataTable was empty, and re-apply the sort... Anyone know whats going on here, and am I doing something wrong? FYI: What we based this off if comes from the MSDN as well: http://msdn.microsoft.com/en-us/library/ms745786.aspx

    Read the article

  • Win32: What is the status of chunked encoding support in WinHttpReadData?

    - by Cheeso
    The documentation for WinHttpReadData says, regarding HTTP's chunked transfer coding: Starting in Windows Vista and Windows Server 2008, WinHttp enables applications to perform chunked transfer encoding on data sent to the server. When the Transfer-Encoding header is present on the WinHttp response, WinHttpReadData strips the chunking information before giving the data to the application. Can anyone decipher this? Q1 First, this text is on the page for WinHttpReadData, which is used to ... read data within an HTTP client application, specifically the response data. So what does it mean when it says Starting in Windows Vista and Windows Server 2008, WinHttp enables applications to perform chunked transfer encoding on data sent to the server. The WinHttpReadData function isn't used with data being sent to the server. It is used when reading data from the server. Consulting the doc for the WinHttpWriteData function, which is used to send data to the server as part of an HTTP request, there is no mention of the chunked transfer capability. Q2 Supposing that I figure out just what the newish chunked transfer support amounts to, how do I get that support? It says that it is new on Vista and WS2008. What happens if I write an app that runs on WS2003, and uses WinHttpReadData and it encounters a chunked response, or WinHttpWriteData, and it wants to send a chunked request? Between the lines, is this documentation saying that I need to link against the Vista-era Windows SDK, or later, in order to get the capability to do chunked encoding? Or is it really impossible on WS2003?, in other words it is the case that the app doing chunked transfer using this library must run on the OS specified? This might read like a rant, but it's not. I truly want to know.

    Read the article

facebook twitter digg google delicious technorati stumbleupon myspace wordpress linkedin gmail igoogle windows live tumblr viadeo yahoo buzz yahoo mail yahoo bookmarks favorites email print

< Previous Page | 566 567 568 569 570 571 572 573 574 575 576 577  | Next Page >