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• How to Force iPhone to Check Orientation

  - by Shannon A.

  Here's the problem: View Controller #1 only runs in the two landscape orientations. View Controller #2 runs in any orientation. When view controller #2 is pushed on top of view controller #1 (using presentModalViewController:animated:, as it happens), there's no check for orientation. Instead, VC #2 just assumes the orientation is whichever landscape orientation VC #1 is currently in. This behavior is incorrect if the user happens to be holding the iPhone in a portrait orientation, despite the fact that he's viewing VC #1 where it's not supported. This can easily happen during startup, so it's not just a theoretical question. Is there any way to tell VC #2 to recheck what it's orientation actually is? If so, where would it be best placed? viewDidLoad?

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• Can't store array in json field in postgresql (rails) can't cast Array to json

  - by Drew H

  This is the error I'm getting when I run db:migrate rake aborted! can't cast Array to json This is my table class CreateTrips < ActiveRecord::Migration def change create_table :trips do |t| t.json :flights t.timestamps end end end This is in my seeds.rb file flights = [{ depart_time_hour: 600, arrive_time_hour: 700, passengers: [ { user_id: 1, request: true } ] }] trip = Trip.create( { name: 'Flight', flights: flights.to_json } ) For some reason I can't do this. If I do this. trip = Trip.create( { name: 'Flight', flights: { flights: flights.to_json } } ) It works. I don't want this though because now I have to access the json array with trip.flights.flights. Not the behavior I'm wanting.

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• ANTLR lexer mismatches tokens

  - by Barry Brown

  I have a simple ANTLR grammar, which I have stripped down to its bare essentials to demonstrate this problem I'm having. I am using ANTLRworks 1.3.1. grammar sample; assignment : IDENT ':=' NUM ';' ; IDENT : ('a'..'z')+ ; NUM : ('0'..'9')+ ; WS : (' '|'\n'|'\t'|'\r')+ {$channel=HIDDEN;} ; Obviously, this statement is accepted by the grammar: x := 99; But this one also is: x := @!$()()%99***; Output from the ANTLRworks Interpreter: What am I doing wrong? Even other sample grammars that come with ANTLR (such as the CMinus grammar) exhibit this behavior.

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• Upgrading to IIS7 stopped Firefox from receiving cookies?

  - by Ted Spence

  Our website has been using IIS6 for a long time. We test on IE8, Firefox, and Chrome. All browsers worked fine. We recently did an upgrade to IIS7, and Chrome and IE8 continue to work normally, but Firefox appears to be unable to get the ASP session cookie. As a result, when our code checks the Session[] object, we see nothing, we think the user has logged out, and the site resets your session. Does anyone know why upgrading to IIS7 would cause this behavior in Firefox? We've: 1) Reverted our application pool back to classic mode (no change); 2) Added a dummy value in the Global.asax object (no change); and 3) changed the web.config file from "authentication cookieless=autodetect" to "cookieless=usercookie" and back (no change).

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• MkMapView setRegion animation prevents touch events on Annotation Views

  - by Vlad Gurovich

  Hi there! We have a MKmapView with a bunch of Image Annotation where each Image annotation responds to touch by overriding these methods of AnnotationView subclass: -(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event; -(void) touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event Our map region is updated using [MkMapView setRegion:animated:] whenever the new location is received and is far enough from the old location to make a difference. What I noticed is that if we set animated flag to YES the touches on our annotation are rarely detected(probably due to the fact that main thread is busy animating between two map regions. When we set animated flag to NO, everything is fine, but map transition may(or may not) become jerky. The question I have is whether this is an expected behavior of animated flag of [MkMapView setRegion:animated] function or whether there is a workaround for this issue. Thanks in advance

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• shouldAutorotateToInterfaceOrientation isn't getting called

  - by morgancodes

  What sort of conditions might prevent my UIViewController's shouldAutorotateToInterfaceOrientation method from being called? I've resorted to using NSNotificationCenter to listen for UIDeviceOrientationDidChangeNotification events, but would love to get the autoRotation behavior working properly. A couple shots in the dark about what's going wrong: Maybe I'm not creating my view controller correctly? Maybe it needs to be inserted in the responder chain and somthething I'm doing is preventing that from happening normally? This seems unlikely to me since my view controller is recieving touch events. Maybe the fact that the view contained by my controller relies on OpenGL has something to do with shouldAutorotateToInterfaceOrientation not getting called? Do either of these sound remotely possible as being responsible? Any other ideas of things to look at?

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• Select and Insert across dblink

  - by Domtar

  I am having a bit of trouble with a select into insert across a dblink in oracle 10. I am using the following statement: INSERT INTO LOCAL.TABLE_1 ( COL1, COL2) SELECT COL1, COL2 FROM REMOTE.TABLE1@dblink s WHERE COL1 IN ( SELECT COL1 FROM WORKING_TABLE) When I run the statement the following is what gets run against the remote server on the DB Link: SELECT /*+ OPAQUE_TRANSFORM */ "COL1", "COL2" FROM "REMOTE"."TABLE1" "S" If I run the select only and do not do the insert into the following is run: SELECT /*+ */ "A1"."COL1" , "A1"."COL2" FROM "REMOTE"."TABLE1" "A1" WHERE "A1"."COL1" = ANY ( SELECT "A2"."COL1" FROM "LOCAL"."TABLE1"@! "A2") The issue is in the insert case the enitre table is being pulled across the dblink and then limited localy which takes a fair bit of time given the table size. Is there any reason adding the insert would change the behavior in this manner?

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• Let system time determine animation speed, not program FPS

  - by Anders

  I'm writing a card game in ActionScript 3. Each card is represented by an instance of a class extending movieclip exported from Flash CS4 that contains the card graphics and a flip animation. When I want to flip a card I call gotoAndPlay on this movieclip. When the frame rate slows down all animations take longer to finish. It seems Flash will by default animate movieclips in a way that makes sure all frames in the clip will be drawn. Therefor, when the program frame rate goes below the frame rate of the clip, the animation will be played at a slower pace. I would like to have an animation always play at the same speed and as a consequence always be shown on the screen for the same amount of time. If the frame rate is too slow to show all frames, frames are dropped. Is is possible to tell Flash to animate in this way? If not, what is the easiest way to program this behavior myself?

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• C#: Dynamically instantiate different classes in the same statement?

  - by C. Griffin

  Here is a simplified version of what I'm trying to do: Without having multiple if..else clauses and switch blocks, can I mimic the behavior of Javascript's eval() shudder to instantiate a class in C#? // Determine report orientation -- Portrait or Landscape // There are 2 differently styled reports (beyond paper orientation) string reportType = "Portrait"; GenericReport report; report = new eval(reportType + "Report()"); // Resolves to PortraitReport() The need stems from the fact that I have 6 types of Crystal Reports (that do the same thing, but look drastically different) for 50 states. There are 3 styles each, rather than entertain the notion of a giant switch block with nested if..else statements determining which of 900 reports to use, I was hoping for an eval-like solution.

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• iPad modal form sheet takes up the whole screen anyways

  - by quixoto

  I'm trying to create a form sheet modal on iPad, which should be a 540x620 modal view. I've created a view controller with a NIB file whose view is a 540x620 sized UIView (with stuff on it). I set the modal presentation style to UIModalPresentationFormSheet, and call presentModalViewController:animated: on the current view controller. My view slides in from the bottom, but instead of being a form sheet, it takes up the whole screen (my view elements are all anchored in the top left of the screen). Even stranger, when I dismiss it, all the UI that was "underneath" it, is all re-layed out to be in the center, in approximately a form sheet sized area in the center of the screen. Bizarro! Anyone have any suggestions as to what could cause this behavior? Thanks.

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• CSS Attribute Content Selector multiple declarations

  - by Dave

  I have this in my CSS: div#headwrap ul li a[href*="dev"] {background: #034769}; div#headwrap ul li a[href*="music"] {background: #A61300}; div#headwrap ul li a[href*="opinion"] {background: #b2d81e}; div#headwrap ul li a[href*="work"] {background: #ffc340}; So, my expected behavior is that where a link (a) within a list item (li) inside a unordered list (ul) inside a div with id "headwrap" has an href that contains "dev", the link will have a background color of #034769. If the link has an href that contains "music" it will have a background color of #A61300, and so on. However, what I am seeing is that the rule is only correctly applied to "dev". If I reorder the CSS declarations (putting music first, for instance), it only gets applied to "music". I'm testing in Firefox and Chrome, both are doing the same thing. Only the first one is applied. Anyone have any ideas why?

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• Firefox session cookies

  - by meandmycode

  Generally speaking, when given a cookie that has no expiration period, modern browsers will consider this cookie to be a 'session cookie', they will remove the cookie at the end of the browsing session (generally when the browser instance closes). IE, Opera, Safari and Chrome all support this behavior. However firefox (3.0.9 latest proper release) appears not to follow this rule, from what I can tell it doesn't expire the cookies when the browser is closed, or when the user logs off or restarts the OS.. So, why does firefox refer to these as session cookies, when they last aparently indefinitely? Does anyone know how Firefox handles session cookie expiration?

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• Keystrokes in Winforms app causing window to close unexpectedly

  - by Paul Sasik

  I have a strange issue that has arisen recently: Whenever I enter text, even a single character, into a textbox in any Form in my application it causes the form and its parent to close. I've checked for the following so far: Errant/mis-assigned event handlers that may be interpreting a keystroke as a Form cancel I am using keypreview in several windows but debugging shows this to not be a cause Happens in any form of the application Happens even with brand new text boxes dropped on the form Tried removing the WithEvents declaration from text box declarations (VB.NET) The result is DialogResult.Cancel when I break the code after Show or ShowDialog The forms do not use AcceptButton or CancelButton properties (set to none) Note: I am modifying a large codebase with a lot of code that I have yet to touch What else could be causing this strange behavior?

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• iPhone Safari localStorage does not persist after device reboot

  - by Tom

  Hi, I write a simple iPhone web app using HTML5's localStorage. Tests on a 2G device show the data does not persist after an iPhone reboot. This is a test code: <html> <head> <meta name="viewport" content="height=device-height, width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no" /> </head> <body> <script> alert("1:" + localStorage.getItem("test")); localStorage.setItem("test", "123"); alert("2:" + localStorage.getItem("test")); </script> </body> As far as I understand the data should persist even after a device reboot. Can anyone shed some light on this behavior? Thanks! Tom.

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• Is there anyway to make a Rails / Rack application tell the web server to drop the connection

  - by dasil003

  There are many security reasons why one would want to drop an HTTP connection with no response (eg. OWASP's SSL best practices). When these can be detected at the server level then it's no big deal. However, what if you can only detect this condition at the application level? Does Rails, or more generally Rack, have any standard way of telling the server to drop the connection without a response? If not, are there some standard headers to pass in that will accomplish that in common web servers (I'm thinking Nginx or Apache)? Even if there is not a standard header is there a reasonable way to configure that behavior? Is this a fool's errand?

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• Can compiler optimization introduce bugs ?

  - by ereOn

  Hi, Today I had a discussion with a friend of mine and we debated for a couple of hours about "compiler optimization". I defended the point that sometimes, a compiler optimization might introduce bugs or at least, undesired behavior. My friend totally disagreed, saying that "compiler are built by smart people and do smart things" and thus, can never go wrong. He didn't convinced my at all, but I have to admit I lack of real-life examples to strengthen my point. Who is right here ? If I am, do you have any real-life example where a compiler optimization produced a bug in the resulting software ? If I'm mistaking, should I stop programming and learn fishing instead ? Thank you !

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• Transactions not working for SubSonic under Oracle?

  - by Fervelas

  The following code sample works perfectly under SQL Server 2005: using (TransactionScope ts = new TransactionScope()) { using (SharedDbConnectionScope scope = new SharedDbConnectionScope()) { MyTable t = new MyTable(); t.Name = "Test"; t.Comments = "Comments 123"; t.Save(); ts.Complete(); } } But under Oracle 10g it throws a "ORA-02089: COMMIT is not allowed in a subordinate session" error. If I only execute the code inside the SharedDbConnectionScope block then everything works OK, but obviously I won't be able to execute operations under a transaction, thus risking data corruption. This is only a small sample of what my real application does. I'm not sure as to what may be causing this behavior; anyone out there care to shed some light on this issue please? Many thanks in advance.

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• perl Getopt::Long madness

  - by ennuikiller

  The following code works in one script yet in another only works if a specify the "--" end of options flag before specifying an option: my $opt; GetOptions( 'help|h' => sub { usage("you want help?? hahaha, hopefully your not serious!!"); }, 'file|f=s' => \$opt->{FILE}, 'report|r' => \$opt->{REPORT}, ) or usage("Bad Options"); In other words, the same code words in good.pl and bad.pl like so: good.pl -f bad.pl -- -f If I try bad.pl -f I get "unknown option:f" Anyone have any clue as to what can cause this behavior? Thanks in advnace!

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• Basic XStream Annotations

  - by jmcmahon

  Hello, I just started using XStream Annotations, and I am trying to figure out how to associate the annotations with the XStream object. From the documentation, it seems like this is the accepted method: XStream xstream = new XStream(new DomDriver()); xstream.processAnnotations(AnnotatedClass.class); My problem with this is that Eclipse isn't recognizing this as a valid method. Everything seems to be configured correctly in Eclipse because it shows me the rest of the methods that are in the XStream object. It's almost like Eclipse thinks it's an older version of xstream. I've tried running a Project Clean inside of Eclipse but that didn't fix anything. I've also tried downloading the XStream jar again which didn't help either. Versions: XStream 1.3.1, Eclipse 3.4, Java 6 Has anybody seen this strange behavior before, or have any ideas on how to fix it?

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• UISearchDisplayController changing row height

  - by tewha

  I've set my UITableView row height to in Interface Builder to 54.0. I have a UISearchDisplayController on that view. When the user taps the search bar in it, the table resizes properly. However, when they start typing (and actually doing the search) the row height decreases. It stays wrong until the search taps Cancel. I could find no documentation on this behavior on Apple's site. I've tried setting the row height in UISearchDisplayDelegate delegate calls. This might be the right approach, but I don't know the details and couldn't get it ti work. I've also tried implementing -- (CGFloat)tableView:(UITableView *)tableView -heightForRowAtIndexPath:(NSIndexPath *)indexPath;. This worked, but I have thousands of entries in this list and can't take the performance hit. What's the right way to fix this?

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• ListBoxItem IsSelected style

  - by plotnick

  I still didn't get it. Could you please show me exactly how to override ListBox's default behavior. Everytime when ListBoxItem is selected the Border's background should be changed. Not the background of the whole row but only background of the border which's specified. <ListBox ItemsSource="{Binding Source={StaticResource AssetsViewSource}}"> <ListBox.ItemTemplate> <DataTemplate> <Border BorderThickness="2" BorderBrush="Black"> <StackPanel> <TextBlock Text="Name: " /> <TextBlock Text="{Binding Name}" /> </StackPanel> </Border> </DataTemplate> </ListBox.ItemTemplate> </ListBox>

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• Java Interface Usage Guidelines -- Are getters and setters in an interface bad?

  - by user68759

  What do people think of the best guidelines to use in an interface? What should and shouldn't go into an interface? I've heard people say that, as a general rule, an interface must only define behavior and not state. Does this mean that an interface shouldn't contain getters and setters? My opinion: Maybe not so for setters, but sometimes I think that getters are valid to be placed in an interface. This is merely to enforce the implementation classes to implement those getters and so to indicate that the clients are able to call those getters to check on something, for example.

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• Is Updating double operation atomic

  - by Yan Cheng CHEOK

  In Java, updating double and long variable may not be atomic, as double/long are being treated as two separate 32 bits variables. http://java.sun.com/docs/books/jls/second_edition/html/memory.doc.html#28733 In C++, if I am using 32 bit Intel Processor + Microsoft Visual C++ compiler, is updating double (8 byte) operation atomic? I cannot find much specification mention on this behavior. When I say "atomic variable", here is what I mean : Thread A trying to write 1 to variable x. Thread B trying to write 2 to variable x. We shall get value 1 or 2 out from variable x, but not an undefined value.

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• TinyMCE editor dislikes being moved around

  - by zneak

  Hello guys, On a page I have, I need to move TinyMCE editors in the DOM tree once in a while. However, for some reason, the editor doesn't like it: it clears itself completely and becomes unusable. As far as I can see, this behavior is consistent between Safari 4 and Firefox 3.6, but not Internet Explorer 7/8. Here's an example. It truly is pissing me off to do something that works in Internet Explorer but not with more appreciable browsers. Is there something I missed in the docs about never trying to move an editor in the DOM tree? Is there some kind of workaround?

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• Sql Server Service Broker Conversation Groups

  - by Brian Hasden

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

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