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  • UITabbar without controller

    - by Etienne
    Hello. I have a simple app where the only view controller has an outlet to a UITabBar. It also implements UITabBarDelegate and is set as the delegate for the UITabBar: @interface TheMainViewController : UIViewController <UITabBarDelegate> { IBOutlet UITabBar *theTabBar; } I implemented the following method Which gets called whenever any of my 4 UITabBarItems get tapped. I tried just doing something really simple: - (void)tabBar:(UITabBar *)tabBar didSelectItem:(UITabBarItem *)item { tabBar.selectedItem = [tabBar.items objectAtIndex:0]; return; } In theory, it should always stay selected on my first tab and it works perfectly when I just tap any UITabBarItem (nothing happens, the first one always stays selected). But when I touch a UITabBarItem and hold it (not taking my finger off) the selection changes anyway ! Debugging, everything gets called properly. It's like changing the selectedItem property doesn't have any effect is the user still has the item "down" (with his finger on it). What would be a good workaround? I tried overloading UITabBar and messing with touchesBegan and touchesEnd but they don't even get called. Same with UITabBarItem. Oh and please don't suggest using a UITabBarController as it is not flexible enough for my application. So frustrating....thanks!

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  • NHibernate, Databinding to DataGridView, Lazy Loading, and Session managment - need advice

    - by Tom Bushell
    My main application form (WinForms) has a DataGridView, that uses DataBinding and Fluent NHibernate to display data from a SQLite database. This form is open for the entire time the application is running. For performance reasons, I set the convention DefaultLazy.Always() for all DB access. So far, the only way I've found to make this work is to keep a Session (let's call it MainSession) open all the time for the main form, so NHibernate can lazy load new data as the user navigates with the grid. Another part of the application can run in the background, and Save to the DB. Currently, (after considerable struggle), my approach is to call MainSession.Disconnect(), create a disposable Session for each Save, and MainSession.Reconnect() after finishing the Save. Otherwise SQLite will throw "The database file is locked" exceptions. This seems to be working well so far, but past experience has made me nervous about keeping a session open for a long time (I ran into performance problems when I tried to use a single session for both Saves and Loads - the cache filled up, and bogged down everything - see http://stackoverflow.com/questions/2526675/commit-is-very-slow-in-my-nhibernate-sqlite-project). So, my question - is this a good approach, or am I looking at problems down the road? If it's a bad approach, what are the alternatives? I've considered opening and closing my main session whenever the user navigates with the grid, but it's not obvious to me how I would do that - hook every event from the grid that could possibly cause a lazy load? I have the nagging feeling that trying to manage my own sessions this way is fundamentally the wrong approach, but it's not obvious what the right one is.

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  • Failed to set the initialPlaybackTime for a MPMoviePlayerController when recreating it in the second

    - by vicky
    Hi, everyone. It's really wired. When at the first time a MPMoviePlayerController (e.g., theMovie) is created, its initialPlaybackTime can be set successfully. But when theMoive is released and re-create a new MPMoviePlayerController, its intialPlaybackTime can not be set correctly, actually the movie always plays from the start. The code is as follows. -(void)initAndPlayMovie:(NSURL *)movieURL { MPMoviePlayerController *theMovie = [[MPMoviePlayerController alloc] initWithContentURL:movieURL]; // create a notification for moviePlaybackFinish [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(moviePlayBackDidFinish:) name:MPMoviePlayerPlaybackDidFinishNotification object:theMovie]; theMovie.initialPlaybackTime = 15; [theMovie setScalingMode:MPMovieScalingModeAspectFill]; [theMovie play];} -(void) moviePlayBackDidFinish:(NSNotification*)notification { MPMoviePlayerController * theMovie = [notification object]; [[NSNotificationCenter defaultCenter] removeObserver:self name:MPMoviePlayerPlaybackDidFinishNotification object:theMovie]; [theMovie release]; [self initAndPlayMovie:[self getMovieURL]]; } With the above code, when the viewcontroller did load and run initAndPlayMovie, the movie starts to play from 15 seconds, but when it plays finished or "Done" is pushed, a new theMovie is created and starts to play from 0 second. Does anybody know what happened with the initialPlaybackTime property of MPMoviePlayerController? And whenever you reload the viewController where the above code is (presentModalViewController from a parent viewcontroller), the movie can start from any playback time. I am really confused what's the difference of the MPMoviePlayerController registration methods between the viewcontroller load and the recreating it after release. Need your help! Thank you!

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  • Does Django cache url regex patterns somehow?

    - by Emre Sevinç
    I'm a Django newbie who needs help: Even though I change some urls in my urls.py I keep on getting the same error message from Django. Here is the relevant line from my settings.py: ROOT_URLCONF = 'mydjango.urls' Here is my urls.py: from django.conf.urls.defaults import * # Uncomment the next two lines to enable the admin: from django.contrib import admin admin.autodiscover() urlpatterns = patterns('', # Example: # (r'^mydjango/', include('mydjango.foo.urls')), # Uncomment the admin/doc line below and add 'django.contrib.admindocs' # to INSTALLED_APPS to enable admin documentation: #(r'^admin/doc/', include(django.contrib.admindocs.urls)), # (r'^polls/', include('mydjango.polls.urls')), (r'^$', 'mydjango.polls.views.homepage'), (r'^polls/$', 'mydjango.polls.views.index'), (r'^polls/(?P<poll_id>\d+)/$', 'mydjango.polls.views.detail'), (r'^polls/(?P<poll_id>\d+)/results/$', 'mydjango.polls.views.results'), (r'^polls/(?P<poll_id>\d+)/vote/$', 'mydjango.polls.views.vote'), (r'^polls/randomTest1/', 'mydjango.polls.views.randomTest1'), (r'^admin/', include(admin.site.urls)), ) So I expect that whenever I visit http://mydjango.yafz.org/polls/randomTest1/ the mydjango.polls.views.randomTest1 function should run because in my polls/views.py I have the relevant function: def randomTest1(request): # mainText = request.POST['mainText'] return HttpResponse("Default random test") However I keep on getting the following error message: Page not found (404) Request Method: GET Request URL: http://mydjango.yafz.org/polls/randomTest1 Using the URLconf defined in mydjango.urls, Django tried these URL patterns, in this order: 1. ^$ 2. ^polls/$ 3. ^polls/(?P<poll_id>\d+)/$ 4. ^polls/(?P<poll_id>\d+)/results/$ 5. ^polls/(?P<poll_id>\d+)/vote/$ 6. ^admin/ 7. ^polls/randomTest/$ The current URL, polls/randomTest1, didn't match any of these. I'm surprised because again and again I check urls.py and there is no ^polls/randomTest/$ in it, but there is ^polls/randomTest1/' It seems like Django is somehow storing the previous contents of urls.py and I just don't know how to make my latest changes effective. Any ideas? Why do I keep on seeing some old version of regexes when I try to load that page even though I changed my urls.py?

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  • Paperclip and tempfile with Rails

    - by Eric Koslow
    I'm trying to write a rails application where users can upload images, but Paperclip doesn't seem to be working for me. I've gone through all the basic steps (added has_attached_file, the migration, making the form multipart) but I keep getting the same error whenever I try uploading an image: can't convert nil into Integer Looking at the top of the stack ...rails3/lib/paperclip/processor.rb:46:in `sprintf' ...rails3/lib/paperclip/processor.rb:46:in `make_tmpname' .../ruby-1.9.2-head/lib/ruby/1.9.1/tmpdir.rb:154:in `create' .../ruby-1.9.2-head/lib/ruby/1.9.1/tempfile.rb:134:in `initialize' It seems the problem is in the tempfile. My code: _form.rb <%= form_for @high_school, :html => {:multipart => true} do |f| %> <%= f.error_messages %> ... <div class="field"> <%= f.file_field :photo %> </div> <div class="actions"> <%= f.submit %> </div> <% end %> model/high_school.rb ... validates_length_of :password, :minimum => 4, :allow_blank => true has_attached_file :photo has_many :students ... Is this a known problem? I basically followed the instructions from the github to the letter. My environment: Rails3 and Ruby 1.9.2dev Thank you!

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  • Code Completion -- Aptana Eclipse Plugin

    - by jwmajors81
    I have been doing javascript development for the last couple weeks and have tried JSDT and Aptana to assist in code completion. JSDT wasn't very good at all, but I did have more luck with Aptana (used as eclipse plug-in, not the standalone product). The problem I'm encountering is that when I create javascript classes I cannot get code completion to work. For example, if I use the following then code completion doesn't work: var foo = new function(value){ this.myMethod= function(){ } } I have also verified that the following won't work: function foo(value){ this.myMethod= function(){ } } I have found that using a JSON style does work: var foo = { myMethod: function(){ } } Does anyone know why Aptana works for the last style, but not the first? Using the JSON style won't work for me because I have to have seperate instances of the class in question. Also, I am not very successful in getting code completion to work across files. For example, if I have 3 files in the javascript directory then I usually cannot get Aptana to pick up the JSON style markup in the other two classes. This DID work at one point (for the first 2 classes I created), but since then whenever I add new classes they aren't picked up. Thank you very much for you assistance. Jeremy

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  • MS Access 2003: Can data disappear from records and how do I test for this and prevent it?

    - by user328960
    Problem and about the database: Data from a record in Access 2003 database has disappeared. This database has 1 backend and 3 frontends, multiple users and is hosted on Citrix. Within this database, we have records of all clients served, ranging in the 1000s. Background info: The form for client data entry is set up with various subforms, including both a "programs enrolled" subform and a "services" subform. A client can be enrolled in multiple programs. Once enrolled in a program, services can be entered for that program area using the services subform. There are multiple fields in the services subform, one of which is a drop-down field allowing you to choose from the programs a client has been enrolled in (the list is updated for that client whenever he is enrolled in a new program). The problem details: For one specific record and one specific program area, the program has disappeared from the "programs enrolled" subform and all of the related services have disappeared from the "services" subform for a period of 3 months of data entry. However, other programs and services for this record did not disappear. Questions: Is the disappearance of data a common Access 2003 problem? Are there tests in place that can be run to see if data is disappearing and catch that data? If so, what are they? If there is specific code involved, what is it? What can be done to prevent the disappearing of data (other than using a different database)?

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  • Iframe src set dynamically through JavaScript is being executed twice on Internet Explorer

    - by Pierre
    Hello Everyone, I am encountering a very annoying problem with IE. Basically I need to set the source of an IFrame using JavaScript, however the source document is being executed twice not once during each call. The simplified HTML code is pasted below (I simplified it so that readers can understand it quickly. The source is being set through JavaScript since it will contain dynamic content): <html> <head> <title>Iframe test</title> </head> <body> <iframe id="testIframe" scrolling="no" frameborder="0" src="" width="800" height="600"></iframe> <script language="JavaScript"> document.getElementById("testIframe").src = "http://localhost/test.php"; </script> </body> </html> In this example, test.php inserts a record inside a local database once called. Whenever the page above is called using IE, two rows are being inserted on most occasions (sometimes only 1 row is inserted but this is not the norm). I tested the same script on Chrome and Opera and it works correctly on them so this must be an IE issue. If is set the src directly inside the iframe tag IE starts behaving correctly, however I need to be able to build the URL using javascript. Has anyone encountered this issue? and does anyone know of a solution/workaround? Thanks and Regards Pierre

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  • JSF html component on WebSphere 7.0

    - by Mike Schall
    We are in the process of upgrading to WebSphere 7.0 on Windows 2008 R2. Our applications currently run on WebSphere 6.1 on Windows 2003. We use custom controls we wrote using JSF 1.1 in our applications. Our controls seem to render and interact fine, however whenever we use a JSF HTML component such as: <%@ taglib uri="http://java.sun.com/jsf/html" prefix="h"%> ... <h:graphicImage url="#{MenuBean.bannerImagePath}" /> We get the following error: com.ibm.ws.jsp.JspCoreException: Unable to convert string '#{MenuBean.bannerImagePath}' to class javax.el.ValueExpression for attribute url: java.lang.IllegalArgumentException: Property Editor not registered with the PropertyEditorManager com.ibm.ws.jsp.JspCoreException: Unable to convert string '#{MenuBean.bannerImagePath}' to class javax.el.ValueExpression for attribute url: java.lang.IllegalArgumentException: Property Editor not registered with the PropertyEditorManager at org.apache.jasper.runtime.JspRuntimeLibrary.getValueFromPropertyEditorManager(JspRuntimeLibrary.java:939) at com.ibm._jsp._dashboard._jspx_meth_h_graphicImage_0(_dashboard.java:136) at com.ibm._jsp._dashboard._jspx_meth_f_view_0(_dashboard.java:436) at com.ibm._jsp._dashboard._jspService(_dashboard.java:109) at com.ibm.ws.jsp.runtime.HttpJspBase.service(HttpJspBase.java:98) at javax.servlet.http.HttpServlet.service(HttpServlet.java:831) at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1583) at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1523) I have found an article on IBM's website giving a possible fix: http://www-01.ibm.com/support/docview.wss?uid=swg21318801 However I have removed the specified jars and am still receiving the error message. Again our custom controls seem to work fine under WebSphere 7's JSF 1.2. Thanks for any help you can provide. Mike

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  • VS2010 Text Editor: How do I set the default formatting style for inline code blocks?

    - by nukefusion
    I've got a problem with the formatting of inline code blocks within the VS2010 text editor and wonder if anyone else has had similar problems and found the 'magic' setting I'm looking for. I'm working my way through tutorials in an MVC book. Whenever I add some inline code blocks to a view I want them formatted like so: <% foreach (var link in Model) { %> <a href="<%=Url.RouteUrl(link.RouteValues)%>"> <%=link.Text%> </a> <% } %> What I'm actually getting is this (auto-formatted by the IDE when I finish writing the code): <% foreach (var link in Model) { %> <a href="<%=Url.RouteUrl(link.RouteValues)%>"> <%=link.Text%> </a> <% } %> It's pretty irritating. Any ideas on how I can instruct the IDE to leave my <% % tags alone? I've been fiddling with options under "Tools - Options - Text Editor" for ages but alas am getting nowhere...

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  • Problem with Authlogic and Unit/Functional Tests in Rails

    - by mmacaulay
    I'm learning how unit testing is done in Rails, and I've run into a problem involving Authlogic. According to the Documentation there are a few things required to use Authlogic stuff in your tests: test_helper.rb: require "authlogic/test_case" class ActiveSupport::TestCase setup :activate_authlogic end Then in my functional tests I can login users: UserSession.create(users(:tester)) The problem seems to stem from the setup :activate_authlogic line in test_helper.rb, whenever that is included, I get the following errors when running functional tests: NoMethodError: undefined method `request=' for nil:NilClass authlogic (2.1.3) lib/authlogic/controller_adapters/abstract_adapter.rb:63:in `send' authlogic (2.1.3) lib/authlogic/controller_adapters/abstract_adapter.rb:63:in `method_missing' If I remove setup :activate_authlogic and add instead Authlogic::Session::Base.controller = Authlogic::ControllerAdapters::RailsAdapter.new(self) to test_helper.rb, my functional tests seem to work but now my unit tests fail: NoMethodError: undefined method `params' for ActiveSupport::TestCase:Class authlogic (2.1.3) lib/authlogic/controller_adapters/abstract_adapter.rb:30:in `params' authlogic (2.1.3) lib/authlogic/session/params.rb:96:in `params_credentials' authlogic (2.1.3) lib/authlogic/session/params.rb:72:in `params_enabled?' authlogic (2.1.3) lib/authlogic/session/params.rb:66:in `persist_by_params' authlogic (2.1.3) lib/authlogic/session/callbacks.rb:79:in `persist' authlogic (2.1.3) lib/authlogic/session/persistence.rb:55:in `persisting?' authlogic (2.1.3) lib/authlogic/session/persistence.rb:39:in `find' authlogic (2.1.3) lib/authlogic/acts_as_authentic/session_maintenance.rb:96:in `get_session_information' authlogic (2.1.3) lib/authlogic/acts_as_authentic/session_maintenance.rb:95:in `each' authlogic (2.1.3) lib/authlogic/acts_as_authentic/session_maintenance.rb:95:in `get_session_information' /test/unit/user_test.rb:23:in `test_should_save_user_with_email_password_and_confirmation' What am I doing wrong?

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  • Suggestions for doing async I/O with Task Parallel Library

    - by anelson
    I have some high performance file transfer code which I wrote in C# using the Async Programming Model (APM) idiom (eg, BeginRead/EndRead). This code reads a file from a local disk and writes it to a socket. For best performance on modern hardware, it's important to keep more than one outstanding I/O operation in flight whenever possible. Thus, I post several BeginRead operations on the file, then when one completes, I call a BeginSend on the socket, and when that completes I do another BeginRead on the file. The details are a bit more complicated than that but at the high level that's the idea. I've got the APM-based code working, but it's very hard to follow and probably has subtle concurrency bugs. I'd love to use TPL for this instead. I figured Task.Factory.FromAsync would just about do it, but there's a catch. All of the I/O samples I've seen (most particularly the StreamExtensions class in the Parallel Extensions Extras) assume one read followed by one write. This won't perform the way I need. I can't use something simple like Parallel.ForEach or the Extras extension Task.Factory.Iterate because the async I/O tasks don't spend much time on a worker thread, so Parallel just starts up another task, resulting in potentially dozens or hundreds of pending I/O operations; way too much! You can work around that by Waiting on your tasks, but that causes creation of an event handle (a kernel object), and a blocking wait on a task wait handle, which ties up a worker thread. My APM-based implementation avoids both of those things. I've been playing around with different ways to keep multiple read/write operations in flight, and I've managed to do so using continuations that call a method that creates another task, but it feels awkward, and definitely doesn't feel like idiomatic TPL. Has anyone else grappled with an issue like this with the TPL? Any suggestions?

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  • Using Fancybox with Google Static Maps

    - by Levi Hackwith
    Setup I have multiple links on a page with the class location_link Each Links rel attribute is equal to a city state combo (i.e.,Omaha, NE) Once the page is loaded, a JavaScript function loops through all of the location_link items and binds a click event to them using jQuery. This click event fires a call to the Fancybox constructor that is supposed to show a Google Map of the location that link is associated with The Problem: Whenever I click on one of the "location links", I get the following error message: The requested content cannot be loaded. Please try again later. Code I've Already Written: function setUpLocationLinks() { locationLinks = $("a.location_link"); locationLinks.click( function() { var me = $(this); console.log(me.attr("href")); $.fancybox( { "showCloseButton" : true, "hideOnContentClick" : true, "titlePosition" : "inside", "title" : me.attr("rel"), "type" : "image" } ) return false; } ); } Research I've Already Done: The Google Static Map API no longer requires an API Key. The following is from the Google Static Maps API Page Note: The Google Static Maps API no longer requires a Maps API key! (Google Maps API Premier customers should instead sign their URLs using a new cryptographic key which will be sent to you. See the Premier documentation for more information.) The The Image URL I'm using does resolve and pulls back the data I need When I put the above mentioned URL into a standard <img> tag, the map shows up just fine. I'd like to pull this off without having to create some sort of dummy <img> tag that I'm constantly switching the src attribute out of. Hopefully, you'll find this information helpful. Please let me know if you have any other questions.

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  • Yet another Subversion "Commit failed" MERGE of 'blabla': 200 OK

    - by marty3d
    Hi! I get the infamous "MERGE of 'whatever': 200 OK" whenever I try to commit using a post-commit hook on Windows (running the repository and Trac locally), and I'm going crazy. I've been looking all over for a day now, without finding any solutions. So here's how it's set up and what I've tried so far: Settings: Windows 7 (64-bit) VisualSVN Server TortoiseSVN Trac 0.11.6 I'm using the three standard scripts for post-commit on Windows. Everything works when I run post-commit.cmd from the command prompt with repo and changesetnumber as parameters. After extensive trouble-shooting, I found that if I remove the last line in trac-post-commit.cmd, Python "%~dp0\trac-post-commit-hook.py" -p "%TRAC_ENV%" -r "%REV%" -u "%AUTHOR%" -m "%LOG%", the Commit failed error goes away. Adding 1/0 (generating a division by zero error) in the python script doesn't show anything different. From the command prompt I get an error, though. Removing all code in the python script also makes the commit failed go away, so I guess the culprit is in trac-post-commit-hook.py. Perhaps if I could send the actual error to a log file, I could dig a little deeper, but I'm not sure how. post-commit.cmd: call %~dp0\trac-post-commit-hook.cmd %1 %2 trac-post-commit-hook.cmd: http://trac.edgewall.org/browser/trunk/contrib/trac-post-commit-hook?rev=920 Thank you so much, it would mean alot if someone could assist a little here! /Martin

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  • NSPredicates, scopes and SearchDisplayController

    - by Bryan Veloso
    Building a search with some custom objects and three scopes: All, Active, and Former. Got it working with the below code: - (void)filterContentForSearchText:(NSString*)searchText scope:(NSString *)scope { [[self filteredArtists] removeAllObjects]; for (HPArtist *artist in [self artistList]) { if ([scope isEqualToString:@"All"] || [[artist status] isEqualToString:scope]) { NSComparisonResult result = [[artist displayName] compare:searchText options:(NSCaseInsensitiveSearch|NSDiacriticInsensitiveSearch) range:NSMakeRange(0, [searchText length])]; if (result == NSOrderedSame) { [[self filteredArtists] addObject:artist]; } } } } This works fine and takes scope into account. Since I wanted to search four fields at at time, this question helped me come up with the below code: - (void)filterContentForSearchText:(NSString*)searchText scope:(NSString *)scope { [[self filteredArtists] removeAllObjects]; NSPredicate *resultPredicate = [NSPredicate predicateWithFormat:@"familyName CONTAINS[cd] %@ OR familyKanji CONTAINS[cd] %@ OR givenName CONTAINS[cd] %@ OR givenKanji CONTAINS[cd] %@", searchText, searchText, searchText, searchText]; [[self filteredArtists] addObjectsFromArray:[[self artistList] filteredArrayUsingPredicate:resultPredicate]]; } However it no longer takes scope into account. I have been playing around with if statements, adding AND scope == 'Active', etc. to the end of the statement and using NSCompoundPredicates to no avail. Whenever I activate a scope, I'm not getting any matches for it. Just a note that I've seen approaches like this one that take scope into account, however they only search inside one property.

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  • How do I break down an NSTimeInterval into year, months, days, hours, minutes and seconds on iPhone?

    - by willc2
    I have a time interval that spans years and I want all the time components from year down to seconds. My first thought is to integer divide the time interval by seconds in a year, subtract that from a running total of seconds, divide that by seconds in a month, subtract that from the running total and so on. That just seems convoluted and I've read that whenever you are doing something that looks convoluted, there is probably a built-in method. Is there? I integrated Alex's 2nd method into my code. It's in a method called by a UIDatePicker in my interface. NSDate *now = [NSDate date]; NSDate *then = self.datePicker.date; NSTimeInterval howLong = [now timeIntervalSinceDate:then]; NSDate *date = [NSDate dateWithTimeIntervalSince1970:howLong]; NSString *dateStr = [date description]; const char *dateStrPtr = [dateStr UTF8String]; int year, month, day, hour, minute, sec; sscanf(dateStrPtr, "%d-%d-%d %d:%d:%d", &year, &month, &day, &hour, &minute, &sec); year -= 1970; NSLog(@"%d years\n%d months\n%d days\n%d hours\n%d minutes\n%d seconds", year, month, day, hour, minute, sec); When I set the date picker to a date 1 year and 1 day in the past, I get: 1 years 1 months 1 days 16 hours 0 minutes 20 seconds which is 1 month and 16 hours off. If I set the date picker to 1 day in the past, I am off by the same amount. Update: I have an app that calculates your age in years, given your birthday (set from a UIDatePicker), yet it was often off. This proves there was an inaccuracy, but I can't figure out where it comes from, can you?

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  • Design Patterns Recommendation for Filtering Option

    - by Tarik
    Hi people, I am thinking to create a filter object which filters and delete everything like html tags from a context. But I want it to be independent which means the design pattern I can apply will help me to add more filters in the future without effecting the current codes. I thought Abstract Factory but it seems it ain't gonna work out the way I want. So maybe builder but it looks same. I don't know I am kinda confused, some one please recommend me a design pattern which can solve my problem but before that let me elaborate the problem a little bit. Lets say I have a class which has Description field or property what ever. And I need filters which remove the things I want from this Description property. So whenever I apply the filter I can add more filter in underlying tier. So instead of re-touching the Description field, I can easily add more filters and all the filters will run for Description field and delete whatever they are supposed to delete from the Description context. I hope I could describe my problem. I think some of you ran into the same situation before. Thanks in advance...

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  • Client-Server Networking Between PHP Client and Java Server

    - by Muhammad Yasir
    Hi there, I have a university project which is already 99% completed. It consists of two parts-website (PHP) and desktop (Java). People have their accounts on the website and they wish to query different information regarding their accounts. They send an SMS which is received by desktop application which queries database of website (MySQL) and sends the reply accordingly. This part is working superbly. The problem is that some times website wishes to instruct the desktop application to send a specific SMS to a particular number. Apparently there seems no way other than putting all the load to the DB server... This is how I made it work. Website puts SMS jobs in a specific table. Java application polls this table again and again and if it finds a job, it executes it. Even this part is working correctly but unfortunately it is not acceptable by my university to poll the DB like this. :( The other approach I could think of is to use client-server one. I tried making Java server and its PHP client. So that whenever an SMS is to be sent, the website opens a socket connection to desktop application and sends two strings (cell # and SMS message). Unfortunately I am unable to do this. I was successfully to make a Java server which works fine when connected by a Java client, similarly my PHP client connects correctly to a PHP server, but when I try to cross them, they start hating each other... PHP shows no error but Java gives StreamCorruptedException when it tries to read header of input stream. Could someone please tell what I can try to make PHP client and Java server work together? Or if the said purpose can be achieved by another means, how? Regards, Yasir

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  • Is there a perfect algorithm for chess?

    - by Overflown
    Dear Stack Overflow community, I was recently in a discussion with a non-coder person on the possibilities of chess computers. I'm not well versed in theory, but think I know enough. I argued that there could not exist a deterministic Turing machine that always won or stalemated at chess. I think that, even if you search the entire space of all combinations of player1/2 moves, the single move that the computer decides upon at each step is based on a heuristic. Being based on a heuristic, it does not necessarily beat ALL of the moves that the opponent could do. My friend thought, to the contrary, that a computer would always win or tie if it never made a "mistake" move (however do you define that?). However, being a programmer who has taken CS, I know that even your good choices - given a wise opponent - can force you to make "mistake" moves in the end. Even if you know everything, your next move is greedy in matching a heuristic. Most chess computers try to match a possible end game to the game in progress, which is essentially a dynamic programming traceback. Again, the endgame in question is avoidable though. -- thanks, Allan Edit: Hmm... looks like I ruffled some feathers here. That's good. Thinking about it again, it seems like there is no theoretical problem with solving a finite game like chess. I would argue that chess is a bit more complicated than checkers in that a win is not necessarily by numerical exhaustion of pieces, but by a mate. My original assertion is probably wrong, but then again I think I've pointed out something that is not yet satisfactorily proven (formally). I guess my thought experiment was that whenever a branch in the tree is taken, then the algorithm (or memorized paths) must find a path to a mate (without getting mated) for any possible branch on the opponent moves. After the discussion, I will buy that given more memory than we can possibly dream of, all these paths could be found.

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  • Rails test db doesn't persist record changes

    - by nathan.f77
    I've been trying to solve a problem for a few weeks now. I am running rspec tests for my Rails app, and they are working fine except for one error that I can't seem get my head around. I am using MySQL with the InnoDB engine. I have set config.use_transactional_fixtures = true in spec_helper.rb I load my test fixtures manually with the command rake spec:db:fixtures:load. The rspec test is being written for a BackgrounDRb worker, and it is testing that a record can have its state updated (through the state_machine gem). Here is my problem: I have a model called Listings. The rspec test calls the update_sold_items method within a file called listing_worker.rb. This method calls listing.sell for a particular record, which sets the listing record's 'state' column to 'sold'. So far, this is all working fine, but when the update_sold_items method finishes, my rspec test fails here: listing = Listing.find_by_listing_id(listing_id) listing.state.should == "sold" expected: "sold", got: "current" (using ==) I've been trying to track down why the state change is not persisting, but am pretty much lost. Here is the result of some debugging code that I placed in the update_sold_items method during the test: pp listing.state # => "current" listing.sell! listing.save! pp listing.state # => "sold" listing.reload pp listing.state # => "current" I cannot understand why it saves perfectly fine, but then reverts back to the original record whenever I call reload, or Listing.find etc. Thanks for reading this, and please ask any questions if I haven't given enough information. Thanks for your help, Nathan B P.S. I don't have a problem creating new records for other classes, and testing those records. It only seems to be a problem when I am updating records that already exist in the database.

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  • IKImageView resize is blocky

    - by Brian Postow
    I am putting an image into an IKImageView, and immediately sizing it to fit. Whenever I do this, the image originally appears at 1-1 size (huge) and then resizes down, which would be fine if the animation was smooth. However, the animation looks ... fluttery? There are big blocks, like 2 inches square, of the image that appear and shrink independently of each other. The effect is a little annoying, and almost to the level where it might give an epileptic a seizure... (I'm exaggerating a little). Is this a bug in IKImageView? Is it a bug in the animation? Will it go away if I turn off the animation (How do I do that? setAnimates: NO doesn't seem to do anything, nor does overloading animates to return NO in my subclass... EDIT: addedcode: NSImage* image = [doc currentImage]; [imageView setImage: image]; [imageView zoomImageToFit: self]; This is in the app controller, so self is the application (or plugin, depending on which version I'm looking at)

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  • Visual Studio setup problem - 'A problem has been encountered while loading the setup components. Ca

    - by kronoz
    Hi All, I've had a serious issue with my Visual Studio 2008 setup. I receive the ever-so-useful error 'A problem has been encountered while loading the setup components. Canceling setup.' whenever I try to uninstall, reinstall or repair Visual Studio 2008 (team system version). If I can't resolve this issue I have no choice but to completely wipe my computer and start again which will take all day long! I've recently received very strange errors when trying to build projects regarding components running out of memory (despite having ~2gb physical memory free at the time) which has rendered my current VS install useless. Note I installed VS2005 shell version using the vs_setup.msi file in the SQL Server folder after I had installed VS2008, in order to gain access to the SQL Server 2005 Reporting Services designer in Business Intelligence Development Studio (this is inexplicably unavailable in VS2008). Does anyone have any solutions to this problem? P.S.: I know this isn't directly related to programming, however I feel this is appropriate to SO as it is directly related to my ability to program at all! Note: A colleague found a solution to this problem, hopefully this should help others with this problem.

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  • SQL Exception: "Impersonate Session Security Context" cannot be called in this batch because a simul

    - by kasey
    When opening a connection to SQL Server 2005 from our web app, we occasionally see this error: "Impersonate Session Security Context" cannot be called in this batch because a simultaneous batch has called it. We use MARS and connection pooling. The exception originates from the following piece of code: protected SqlConnection Open() { SqlConnection connection = new SqlConnection(); connection.ConnectionString = m_ConnectionString; if (connection != null) { try { connection.Open(); if (m_ExecuteAsUserName != null) { string sql = Format("EXECUTE AS LOGIN = {0};", m_ExecuteAsUserName); ExecuteCommand(connection, sql); } } catch (Exception exception) { connection.Close(); connection = null; } } return connection; } I found an MS Connect article which suggests that the error is caused when a previous command has not yet terminated before the EXECUTE AS LOGIN command is sent. Yet how can this be if the connection has only just been opened? Could this be something to do with connection pooling interacting strangely with MARS? UPDATE: For the short-term we have implemented a workaround by clearing out the connection pool whenever this happens, to get rid of the bad connection, as it otherwise keeps getting handed back to various users. (Not too bad as this only happens a couple of times a day.) But if anyone has any further ideas, we are still looking out for a real solution...

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  • How to start an iPhone 3.1.3 project in Xcode 3.2.3 (iPhone SDK 4 beta)

    - by Zordid
    Hi there! I am having big problems since I downloaded the beta version of iPhone SDK 4.0. Okay, I just started to look at iPhone development a few weeks ago, but I cannot figure out how Xcode is supposed to work: whenever I start a new project, I choose a template like "View-based application" or so. Now, the target will always (at least I did not find a preference anywhere!) be the latest SDK: 4.0. But then: switching the target back to, say, 3.1.3 the template files seem to contain errors! Starting an empty application this way yields an exception: Terminating app due to uncaught exception 'NSUnknownKeyException', reason: [...] this class is not key value coding-compliant for the key rootViewController sick Now, my (stupid) question: How do I develop an application NOT targeting the latest SDK, but the standard 3.1.3 SDK?? In other words: I would expect Xcode not only to ask for a project type in the New Project window, but also for my desired target!! Am I right that the templates generated with this step are not valid for any other target than 4.0? How can that be?? ...I want my Eclipse back! sigh Can anybody help me please?

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  • Find Port Number and Domain Name to connect to Hive Table

    - by user1419563
    I am new to Hive, MapReduce and Hadoop. I am using Putty to connect to hive table and access records in the tables. So what I did is- I opened Putty and in the host name I typed- ares-ingest.vip.host.com and then I click Open. And then I entered my username and password and then few commands to get to Hive sql. Below is the list what I did $ bash bash-3.00$ hive Hive history file=/tmp/rjamal/hive_job_log_rjamal_201207010451_1212680168.txt hive> set mapred.job.queue.name=hdmi-technology; hive> select * from table LIMIT 1; So my question is- I was trying to connect to Hive Tables using Squirrel SQL Client, so in that my Connection URL is- jdbc:hive://ares-ingest.vip.host.com:10000/default. So whenever I try to connect with these attributes, I always get Hive: Could not establish connection to ares-ingest.vip.host.com:10000/default: java.net.ConnectException: Connection timed out: connect. It might be possible I am using wrong port number or domain name here. Is there any way from the command prompt I can find out these two things, like what Domain Name and Port Number(where Hive server is running) should I use to connect to Hive table from Squirrel SQL Client. As I know host and port are determined by where the hive server is running

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