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  • XStream JavaBeanConverter not serializing properties

    - by Steve Foster
    Hello All, Attempting to use XStream's JavaBeanConverter and running into an issue. Most likely I'm missng something simple, or not understanding XStream's converter handling well enough. @XStreamAlias("test") public class TestObject { private String foo; public String getFoo() { return foo; } public void setFoo(String foo) { this.foo = foo; } } public void test() throws Exception { XStream x = new XStream(new XppDriver()); x.autodetectAnnotations(true); x.processAnnotations(TestObject.class); x.registerConverter(new JavaBeanConverter(x.getMapper())); TestObject o = new TestObject(); o.setFoo("bar"); String xml = x.toXML(o); System.out.println(xml); /* Expecting... <test> <foo>bar</foo> </test> But instead getting... <test> <foo/> </test> */ } I tried adding a trace on the TestObject.getFoo() method and it appears it is being called by XStream, but the data isn't being written to the output stream. After looking at the source for JavaBeanConverter, it looks like my implementation should work, which leads me to believe I haven't configured something correctly during the XStream setup. Am I just missing something simple? Thanks! Edit Also, if it helps, I'm using the following Maven deps for this... <dependency> <groupId>org.apache.servicemix.bundles</groupId> <artifactId>org.apache.servicemix.bundles.xstream</artifactId> <version>1.3_3</version> </dependency> <dependency> <groupId>org.apache.servicemix.bundles</groupId> <artifactId>org.apache.servicemix.bundles.xpp3</artifactId> <version>1.1.4c_3</version> </dependency>

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  • How do I upload an NSImage(NSData)to Twitpic with OAMutableURLRequest?

    - by timothy5216
    I'm using OAConsumer in my xAuth twitterEngine and i'm adding Twitpic OAuth Echo to it. But it won't POST the NSData. here is some of my code: //other file NSArray *reps = [[imageToUpload image] representations]; NSData *imageData = [NSBitmapImageRep representationOfImageRepsInArray:reps usingType:NSJPEGFileType properties:nil]; [twitter testUploadImageData:imageData withMessage:@"Hello WORLD!!" toURL:[NSURL URLWithString:uploadURL.stringValue]]; // - (void)testUploadImageData:(NSData *)data withMessage:(NSString *)message toURL:(NSURL *)url; { //url = @"http://api.twitpic.com/2/upload.xml" //message = @"Hello WORLD!!" NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init]; NSString *String = [[NSString alloc] initWithData:data encoding:NSASCIIStringEncoding]; NSLog(@"dataString: %@",String); OAMutableURLRequest *request = [[OAMutableURLRequest alloc] initWithURL:url consumer:self.consumer token:_accessToken realm:nil signatureProvider:nil]; // Setup POST body [request setHTTPMethod:@"POST"]; //NSString *stringBoundary = [NSString stringWithString:@"0xKhTmLbOuNdArY"]; //NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@", stringBoundary]; // NSString *stringBoundarySeparator = [NSString stringWithFormat:@"\r\n--%@\r\n", stringBoundary]; /* NSMutableString *postString = [NSMutableString string]; [postString appendString:@"\r\n"]; [postString appendString:stringBoundarySeparator]; [postString appendString:[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"message\"\r\n\r\n%@", message]]; [postString appendString:stringBoundarySeparator]; [postString appendString:[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"media\"; filename=\"%@\"\r\n", @"file.jpg"]]; [postString appendString:@"Content-Type: image/jpg\r\n"]; [postString appendString:@"Content-Transfer-Encoding: binary\r\n\r\n"]; // Setting up the POST request's multipart/form-data body NSMutableData *postBody = [NSMutableData data]; [postBody appendData:[postString dataUsingEncoding:NSUTF8StringEncoding]]; [postBody appendData:data]; [request setHTTPBody:postBody]; */ [request setHTTPMethod:@"POST"]; NSString *thing = [[NSString alloc] initWithData:data encoding:NSASCIIStringEncoding]; NSLog(@"%@",thing); [request setParameters:[NSArray arrayWithObjects: [OARequestParameter requestParameterWithName:@"oauth_token" value:_accessToken.key], [OARequestParameter requestParameterWithName:@"X-Auth-Service-Provider" value:@"https://api.twitter.com/1/account/verify_credentials.json"], [OARequestParameter requestParameterWithName:@"key" value:@"my-key-here :P"], [OARequestParameter requestParameterWithName:@"message" value:message], //iv'e changed this many times. I was just trying this to see if it works [OARequestParameter requestParameterWithName:@"media" value:thing], nil]]; OAAsynchronousDataFetcher *dataFetcher = [[OAAsynchronousDataFetcher alloc] init]; [dataFetcher initWithRequest:request delegate:self didFinishSelector:@selector(uploadDidUpload:withData:) didFailSelector:@selector(uploadDidFail:withData:)]; [dataFetcher start]; [dataFetcher release]; [request release]; [pool drain]; } I'm authenticated but it still won't POST the data :(

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  • Failed to save to data store: The operation couldn’t be completed. (Cocoa error 133020.)

    - by poslinski.net
    I am working on quite complex app with huge sync procedure beetwen iphone and web server. I have no troubles with adding records, until I run sync procedure in separete thread, and It will update data on serwer, and send them back to iphone. But after this procedure, inserting new data cause error, such as this: 2011-01-07 12:49:10.722 App[1987:207] Failed to save to data store: The operation couldn’t be completed. (Cocoa error 133020.) 2011-01-07 12:49:10.724 App[1987:207] { conflictList = ( "NSMergeConflict (0x5ac1ea0) for NSManagedObject (0x5a2d710) with objectID '0x5a27080 <x-coredata://E82E75ED-96DB-4CBF-9D15-9CC106AC0052/uzytkownicy/p10>' with oldVersion = 9 and newVersion = 21 and old object snapshot = {\n adres = \"<null>\";\n haslo = xxxxxxxxxxxxxxxxxxxxxx;\n \"id_uzytkownika\" = 3;\n imie = Jan;\n \"kod_jednorazowy\" = 0;\n komorka = \"<null>\";\n login = nowakjan;\n nazwisko = Nowak;\n pesel = 0;\n rodzaj = 2;\n \"stan_konta\" = 0;\n telefon = \"<null>\";\n \"uzytkownicy_uczniowie\" = \"<null>\";\n \"zmienna_losowa\" = 8G9e1;\n} and new cached row = {\n adres = \"<null>\";\n haslo = xxxxxxxxxxxxxxxxxxxxxx;\n \"id_uzytkownika\" = 3;\n imie = Jan;\n \"kod_jednorazowy\" = 0;\n komorka = \"<null>\";\n login = nowakjan;\n nazwisko = Nowak;\n pesel = 0;\n rodzaj = 2;\n \"stan_konta\" = 0;\n telefon = \"<null>\";\n \"uzytkownicy_uczniowie\" = \"<null>\";\n \"zmienna_losowa\" = 8G9e1;\n}", "NSMergeConflict (0xd266990) for NSManagedObject (0xcd05950) with objectID '0x5a453b0 <x-coredata://E82E75ED-96DB-4CBF-9D15-9CC106AC0052/uczniowie/p125>' with oldVersion = 5 and newVersion = 10 and old object snapshot = {\n adres = \"Warszawa; ul. Lwowska 32\";\n \"data_urodzenia\" = \"1997-02-01 23:00:00 +0000\";\n dysfunkcje = \"\";\n email = \"<null>\";\n frekwencja = 0;\n \"id_ucznia\" = 86;\n imie2 = Marian;\n \"imie_ucznia\" = \"S\\U0142awomir\";\n klasa = \"0x5a47820 <x-coredata://E82E75ED-96DB-4CBF-9D15-9CC106AC0052/zespoly/p9>\";\n komorka = \"<null>\";\n \"miejsce_urodzenia\" = Warszawa;\n \"nazwisko_ucznia\" = \"S\\U0142awek\";\n \"numer_ewidencyjny\" = 20;\n opiekun1 = \"Mariusz S\\U0142awek\";\n opiekun2 = \" \";\n pesel = 97020298919;\n plec = 1;\n telefon = 890000002;\n \"uzytkownicy_uczniowie\" = \"<null>\";\n \"web_klasa\" = 50;\n} and new cached row = {\n adres = \"Warszawa; ul. Lwowska 32\";\n \"data_urodzenia\" = \"1997-02-01 23:00:00 +0000\";\n dysfunkcje = \"\";\n email = \"<null>\";\n frekwencja = 0;\n \"id_ucznia\" = 86;\n imie2 = Marian;\n \"imie_ucznia\" = \"S\\U0142awomir\";\n klasa = \"0x5a8e7c0 <x-coredata://E82E75ED-96DB-4CBF-9D15-9CC106AC0052/zespoly/p9>\";\n komorka = \"<null>\";\n \"miejsce_urodzenia\" = Warszawa;\n \"nazwisko_ucznia\" = \"S\\U0142awek\";\n \"numer_ewidencyjny\" = 20;\n opiekun1 = \"Mariusz S\\U0142awek\";\n opiekun2 = \" \";\n pesel = 97020298919;\n plec = 1;\n telefon = 890000002;\n \"uzytkownicy_uczniowie\" = \"<null>\";\n \"web_klasa\" = 50;\n}", "NSMergeConflict (0xd2669b0) for NSManagedObject (0x5a44480) with objectID '0x5a47830 <x-coredata://E82E75ED-96DB-4CBF-9D15-9CC106AC0052/przedmioty/p12>' with oldVersion = 7 and newVersion = 15 and old object snapshot = {\n \"id_przedmiotu\" = 1;\n \"nazwa_przedmiotu\" = Historia;\n \"skrot_nazwy\" = Hist;\n} and new cached row = {\n \"id_przedmiotu\" = 1;\n \"nazwa_przedmiotu\" = Historia;\n \"skrot_nazwy\" = Hist;\n}" ); } I've been looking for any solution but without luck. Thank You in advance for any usefull help.

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  • jQueryUI autocomplete - when no results are returned

    - by Brian M. Hunt
    I'm wondering how one can catch and add a custom handler when empty results are returned from the server when using jQueryUI autocomplete. There seem to be a few questions on this point related to the various jQuery plugins (e.g. jQuery autocomplete display “No data” error message when results empty), but I am wondering if there's a better/simpler way to achieve the same with the jQueryUI autocomplete. It seems to me this is a common use case, and I thought perhaps that jQueryUI had improved on the jQuery autocomplete by adding the ability to cleanly handle this situation. However I've not been able to find documentation of such functionality, and before I hack away at it I'd like to throw out some feelers in case others have seen this before. While probably not particularly influential, I can have the server return anything - e.g. HTTP 204: No Content to a 200/JSON empty list - whatever makes it easiest to catch the result in jQueryUI's autocomplete. My first thought is to pass a callback with two arguments, namely a request object and a response callback to handle the code, per the documentation: The third variation, the callback, provides the most flexibility, and can be used to connect any data source to Autocomplete. The callback gets two arguments: A request object, with a single property called "term", which refers to the value currently in the text input. For example, when the user entered "new yo" in a city field, the Autocomplete term will equal "new yo". A response callback, which expects a single argument to contain the data to suggest to the user. This data should be filtered based on the provided term, and can be in any of the formats described above for simple local data (String-Array or Object-Array with label/value/both properties). When the response callback receives no data, it inserts returns a special one-line object-array that has a label and an indicator that there's no data (so the select/focus recognize it as the indicator that no-data was returned). This seems overcomplicated. I'd prefer to be able to use a source: "http://...", and just have a callback somewhere indicating that no data was returned. Thank you for reading. Brian

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  • iPhone SDK can't get UIScrollView to work with a UIWebView

    - by Maxwell Segal
    I am building an app that in part of it has two views - one portrait and one landscape. And I want to offer scrolling and pinch & zooming on the landscape orientation. I've built the two views and the simple UIImages in the landscape view all work OK but it does not seem to insert my UIWebView into the UIScrollView. I've done this before with UIImage and all was OK but I must be missing something here - can anybody help with some advice. I'm sure it's something very simple - perhaps to do with the adding of the subview??. Thanks in advance of your help. I've shown the relevant parts of my code below: @interface MonthViewController : UIViewController <UIScrollViewDelegate> { MonthViewController *monthController; IBOutlet UIView *portraitView; IBOutlet UIView *landscapeView; IBOutlet UIWebView *monthKWHChartPortrait; UIWebView *monthKWHChartLandscape; IBOutlet UIScrollView *scrollChartLandscape; IBOutlet UIImageView *eLogoPortrait; IBOutlet UIImageView *eLogoLandscape; IBOutlet UIImageView *clientLogoPortrait; IBOutlet UIImageView *clientLogoLandscape; IBOutlet UIActivityIndicatorView *loadIndicatorPortrait; IBOutlet UIActivityIndicatorView *loadIndicatorLandscape; NSTimer *timer; IBOutlet UILabel *test; } -(UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollChartLandscape { return monthKWHChartLandscape; } - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation { return (interfaceOrientation == UIInterfaceOrientationPortrait || interfaceOrientation == UIInterfaceOrientationLandscapeLeft || interfaceOrientation == UIInterfaceOrientationLandscapeRight); } -(void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration { [super willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:duration]; if (toInterfaceOrientation ==UIInterfaceOrientationLandscapeRight) { NSLog(@"right"); test.text=@"right"; NSString *urlAddressLandscape = @"http://PRIVATEURLHERE.aspx?WIDTH=440"; NSURL *urlLandscape = [NSURL URLWithString:urlAddressLandscape]; NSURLRequest *requestObjLandscape = [NSURLRequest requestWithURL:urlLandscape]; [self.monthKWHChartLandscape loadRequest:requestObjLandscape]; scrollChartLandscape.contentSize = CGSizeMake(monthKWHChartLandscape.frame.size.width, monthKWHChartLandscape.frame.size.height); scrollChartLandscape.maximumZoomScale = 2.5; scrollChartLandscape.minimumZoomScale = 0.6; scrollChartLandscape.showsHorizontalScrollIndicator = YES; scrollChartLandscape.showsVerticalScrollIndicator = YES; scrollChartLandscape.clipsToBounds = YES; scrollChartLandscape.delegate = self; [self.scrollChartLandscape addSubview:monthKWHChartLandscape]; self.view=landscapeView; //self.view.transform=CGAffineTransformMakeRotation(deg2rad*(90)); //self.view.bounds=CGRectMake(0.0, 0.0, 480.0, 320.0); } else

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  • link_to passing paramater and display problem - tag feature - Ruby on Rails

    - by bgadoci
    I have gotten a great deal of help from KandadaBoggu on my last question and very very thankful for that. As we were getting buried in the comments I wanted to break this part out. I am attempting to create a tag feature on the rails blog I am developing. The relationship is Post has_many :tags and Tag belongs_to :post. Adding and deleting tags to posts are working great. In my /view/posts/index.html.erb I have a section called tags where I am successfully querying the Tags table, grouping them and displaying the count next to the tag_name (as a side note, I mistakenly called the column containing the tag name, 'tag_name' instead of just 'name' as I should have) . In addition the display of these groups are a link that is referencing the index method in the PostsController. That is where the problem is. When you navigate to /posts you get an error because there is no parameter being passed (without clicking the tag group link). I have the .empty? in there so not sure what is going wrong here. Here is the error and code: Error You have a nil object when you didn't expect it! You might have expected an instance of Array. The error occurred while evaluating nil.empty? /views/posts/index.html.erb <% @tag_counts.each do |tag_name, tag_count| %> <tr> <td><%= link_to(tag_name, posts_path(:tag_name => tag_name)) %></td> <td>(<%=tag_count%>)</td> </tr> <% end %> PostsController def index @tag_counts = Tag.count(:group => :tag_name, :order => 'updated_at DESC', :limit => 10) @posts=Post.all(:joins => :tags,:conditions=>(params[:tag_name].empty? ? {}: { :tags => { :tag_name => params[:tag_name] }} ) ) respond_to do |format| format.html # index.html.erb format.xml { render :xml => @posts } format.json { render :json => @posts } format.atom end end

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  • how to display image in repeater after AJAX AsyncFileUpload ?

    - by Gordon Shamway
    Hello i am using the AsyncFileUpload from the ajaxtoolkit, upter the upload is complete , i want to display all the images that were uploaded (and their URL is inserted into the DB) with my repeater and binding method. but its not working! the images are uploaded, the DB insert works file, but i cant see the images after the repeater is dinded. (i have to mention that if i go step by step, i do see that the ITEMBOUND is being binded and executed) <ajax:TabContainer runat="server" ID="testTab"> <ajax:TabPanel runat="server" ID="testTabContainer"> <ContentTemplate> <ajax:AsyncFileUpload ID="uploadAsyncImage" runat="server" OnUploadedComplete="InsertToTemp" ThrobberID="Throbber"/> <asp:Label ID="Throbber" runat="server" Style="display: none"> <img src="Images/indicator.gif" align="absmiddle" alt="loading" /> </asp:Label> <br /> <asp:UpdatePanel runat="server" ID="pnlImages" UpdateMode="Conditional" ChildrenAsTriggers="true"> <ContentTemplate> <asp:Repeater runat="server" ID="rptImages" > <ItemTemplate> <a href="<%# DataBinder.Eval(Container.DataItem, "PicURL")%>" rel="lightbox"> <asp:Image ImageUrl='<%# DataBinder.Eval(Container.DataItem, "PicURL")%>' Width="50" Height="50" runat="server" ID="testPic" /> </a> </ItemTemplate> </asp:Repeater> </ContentTemplate> </asp:UpdatePanel> </ContentTemplate> </ajax:TabPanel> </ajax:TabContainer> </form> also adding my Code Behind, since it might be important or will help you get an idea of what i am trying to do.private void BindRepater() { ProjDataContext db = DbContext.DbContextProvider(); var pic = from p in db.TempProdCats where p.SessionID == Session.SessionID.ToString() select new { PicURL = p.PicURL }; rptImages.DataSource = pic; rptImages.DataBind(); pnlImages.Update(); } protected void rptImages_ItemDataBound(object sender, RepeaterItemEventArgs e) { if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem) { Image lblCat = (Image)e.Item.FindControl("testPic"); lblCat.ImageUrl = (string)DataBinder.Eval(e.Item.DataItem, "PicURL"); pnlImages.Update(); } } your help will be highly appreciated , if any of you got any idea how to make it work...

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  • Is MVVM pointless?

    - by joebeazelman
    Is orthodox MVVM implementation pointless? I am creating a new application and I considered Windows Forms and WPF. I chose WPF because it's future-proof and offer lots of flexibility. There is less code and easier to make significant changes to your UI using XAML. Since the choice for WPF is obvious, I figured that I may as well go all the way by using MVVM as my application architecture since it offers blendability, separation concerns and unit testability. Theoretically, it seems beautiful like the holy grail of UI programming. This brief adventure; however, has turned into a real headache. As expected in practice, I’m finding that I’ve traded one problem for another. I tend to be an obsessive programmer in that I want to do things the right way so that I can get the right results and possibly become a better programmer. The MVVM pattern just flunked my test on productivity and has just turned into a big yucky hack! The clear case in point is adding support for a Modal dialog box. The correct way is to put up a dialog box and tie it to a view model. Getting this to work is difficult. In order to benefit from the MVVM pattern, you have to distribute code in several places throughout the layers of your application. You also have to use esoteric programming constructs like templates and lamba expressions. Stuff that makes you stare at the screen scratching your head. This makes maintenance and debugging a nightmare waiting to happen as I recently discovered. I had an about box working fine until I got an exception the second time I invoked it, saying that it couldn’t show the dialog box again once it is closed. I had to add an event handler for the close functionality to the dialog window, another one in the IDialogView implementation of it and finally another in the IDialogViewModel. I thought MVVM would save us from such extravagant hackery! There are several folks out there with competing solutions to this problem and they are all hacks and don’t provide a clean, easily reusable, elegant solution. Most of the MVVM toolkits gloss over dialogs and when they do address them, they are just alert boxes that don’t require custom interfaces or view models. I’m planning on giving up on the MVVM view pattern, at least its orthodox implementation of it. What do you think? Has it been worth the trouble for you if you had any? Am I just a incompetent programmer or does MVVM not what it's hyped up to be?

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  • Why is django giving me an attribute error when I call _set.all() for its children models?

    - by user1876508
    I have two models defined from django.db import models class Blog(models.Model): title = models.CharField(max_length=144) @property def posts(self): self.Post_set.all() class Post(models.Model): title = models.CharField(max_length=144) text = models.TextField() blog = models.ForeignKey('Blog') but the problem is, when I run shell, and enter >>> blog = Blog(title="My blog") >>> post = Post(title="My first post", text="Here is the main text for my blog post", blog=blog) >>> blog.posts I get the error Traceback (most recent call last): File "<console>", line 1, in <module> File "/home/lucas/Programming/Python/Django/djangorestfun/blog/models.py", line 9, in posts self.Post_set.all() AttributeError: 'Blog' object has no attribute 'Post_set' >>> Now I am having the following problem >>> from blog.models import * >>> blog = Blog(title="gewrhter") >>> blog.save() >>> blog.__dict__ {'_state': <django.db.models.base.ModelState object at 0x259be10>, 'id': 1, 'title': 'gewrhter'} >>> blog._state.__dict__ {'adding': False, 'db': 'default'} >>> post = Post(title="sdhxcvb", text="hdbfdgb", blog=blog) >>> post.save() >>> post.__dict__ {'blog_id': 1, 'title': 'sdhxcvb', 'text': 'hdbfdgb', '_blog_cache': <Blog: Blog object>, '_state': <django.db.models.base.ModelState object at 0x259bed0>, 'id': 1} >>> blog.posts >>> print blog.posts None Second update So I followed your guide, but I am still getting nothing. In addition, blog.posts gives me an error. >>> from blog.models import * >>> blog = Blog(title="asdf") >>> blog.save() >>> post = Post(title="asdf", text="sdxcvb", blog=blog) >>> post.save() >>> blog.posts Traceback (most recent call last): File "<console>", line 1, in <module> AttributeError: 'Blog' object has no attribute 'posts' >>> print blog.all_posts None

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  • GMF - programmatically create connections without commands

    - by user1437515
    Hi I am developing an graphical editor with GMF and want to create a set of nodes (Resources in my project) and connections between them upon intialization of a new diagram. I do not want to use commands here because without the code is much slimmer, easier to read and also faster it seems to me. There is no problem creating nodes by calling my XXXFactory.eInstance.createResource() and adding them to the diagram model. My connection is contained as source-/targetConnections feature in the resource class. So I added a similarly created connection as source/target to the resources. But it will not show up in the diagram even though it exists in the ResourceImpl structural feature. Maybe I need to add it additionally to the diagram but since its contained by a feature contained by the diagram, I dont know how. Am i doing something wrong or missing something or is it just not possible to do this without commands. Any help would be much appreciated. Sample code is below. The output of it is the two nodes but no connection. Thanks Lars Example createInitialModel method: private static RDFEditor.ShapesDiagram createInitialModel() { ShapesDiagram diagram = >RDFEditor.RDFEditorFactory.eINSTANCE.createShapesDiagram(); RDFEditor.Resource res = RDFEditorFactory.eINSTANCE.createResource(); RDFEditor.Resource res2 = RDFEditorFactory.eINSTANCE.createResource(); Connection con = RDFEditorFactory.eINSTANCE.createConnection(); EStructuralFeature target = >res.eClass().getEStructuralFeature("targetConnections"); EStructuralFeature source = >res.eClass().getEStructuralFeature("sourceConnections"); res2.setName("rdfs:Resource"); res.setName("rdfs:Class"); con.setName("rdfs:type"); con.setSource(res); con.setTarget(res2); res.getSourceConnections().add(con); res.getTargetConnections().add(con); //res2.eSet(target, con); //res.eSet(source, con); List<? extends Shape> resList = Arrays.asList(res,res2); EStructuralFeature shapes = >diagram.eClass().getEStructuralFeature("shapes"); diagram.eSet(shapes, resList); return diagram; }

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  • How to play multiple audio sources simultaneously in Silverlight

    - by Shurup
    I want to play simultaneous multiply audio sources in Silverlight. So I've created a prototype in Silverlight 4 that should play a two mp3 files containing the same ticks sound with an intervall 1 second. So these files must be sounded as one sound if they will be played together with any whole second offsets (0 and 1, 0 and 2, 1 and 1 seconds, etc.) I my prototype I use two MediaElement (me and me2) objects. DateTime startTime; private void Play_Clicked(object sender, RoutedEventArgs e) { me.SetSource(new FileStream(file1), FileMode.Open))); me2.SetSource(new FileStream(file2), FileMode.Open))); var timer = new DispatcherTimer { Interval = TimeSpan.FromMilliseconds(1) }; timer.Tick += RefreshData; timer.Start(); } First file should be played at 00:00 sec. and the second in 00:02 second. void RefreshData(object sender, EventArgs e) { if(me.CurrentState != MediaElementState.Playing) { startTime = DateTime.Now; me.Play(); return; } var elapsed = DateTime.Now - startTime; if(me2.CurrentState != MediaElementState.Playing && elapsed >= TimeSpan.FromSeconds(2)) { me2.Play(); ((DispatcherTimer)sender).Stop(); } } The tracks played every time different and not simultaneous as they should (as one sound). Addition: I've tested a code from the Bobby's answer. private void Play_Clicked(object sender, RoutedEventArgs e) { me.SetSource(new FileStream(file1), FileMode.Open))); me2.SetSource(new FileStream(file2), FileMode.Open))); // This code plays well enough. // me.Play(); // me2.Play(); // But adding the 2 second offset using the timer, // they play no simultaneous. var timer = new DispatcherTimer { Interval = TimeSpan.FromSeconds(2) }; timer.Tick += (source, arg) => { me2.Play(); ((DispatcherTimer)source).Stop(); }; timer.Start(); } Is it possible to play them together using only one MediaElement or any implementation of MediaStreamSource that can play multiply sources?

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  • jquery ui tabs close button beneath the text

    - by Pradyut Bhattacharya
    Hi I m using jquery ui tabs and i m using them with the function of dynamically closing them. the example page here where clicking on the link 'add tab' leads to adding of tabs in the tabs panel... now in firefox the close buttons are displayed beneath the text of the tab which is leading to garbled text in the tab panel or the body of the tabs like other browsers how can i display it in same line the css i m using is .ui-tabs { padding: .20em; zoom: 1; } .ui-tabs .ui-tabs-nav { list-style: none; position: relative; padding: .2em .2em 0; height:27px; } .ui-tabs .ui-tabs-nav li { position: relative; float: left; border-bottom-width: 0 !important; margin: 0 .2em -1px 0; padding: 0; font-size:63.5%; } .ui-tabs .ui-tabs-nav li a { float: left; text-decoration: none; padding: .5em 1em; } .ui-tabs .ui-tabs-nav li.ui-tabs-selected { padding-bottom: 1px; border-bottom-width: 0; } .ui-tabs .ui-tabs-nav li.ui-tabs-selected a, .ui-tabs .ui-tabs-nav li.ui-state-disabled a, .ui-tabs .ui-tabs-nav li.ui-state-processing a { cursor: text; } .ui-tabs .ui-tabs-nav li a, .ui-tabs.ui-tabs-collapsible .ui-tabs-nav li.ui-tabs-selected a { cursor: pointer; font: 62.5%; } .ui-tabs .ui-tabs-panel { padding: 1em 1.4em; display: block; border-width: 0; background:black; color:white; font-size: 12px; } .ui-tabs .ui-tabs-hide { display: none !important; font: 62.5%; } #tabs .ui-tabs-nav li a:hover { float: left; text-decoration: none; padding: .5em 1em; background-color: #868472; } #tabs-profile .ui-tabs-nav li { position: relative; float: left; border-bottom-width: 0 !important; margin: 0 .2em -1px 0; padding: 0; font-size:75%; } Please help thanks Pradyut India

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  • Authorizing a computer to access a web application

    - by HackedByChinese
    I have a web application, and am tasked with adding secure sign-on to bolster security, akin to what Google has added to Google accounts. Use Case Essentially, when a user logs in, we want to detect if the user has previously authorized this computer. If the computer has not been authorized, the user is sent a one-time password (via email, SMS, or phone call) that they must enter, where the user may choose to remember this computer. In the web application, we will track authorized devices, allowing users to see when/where they logged in from that device last, and deauthorize any devices if they so choose. We require a solution that is very light touch (meaning, requiring no client-side software installation), and works with Safari, Chrome, Firefox, and IE 7+ (unfortunately). We will offer x509 security, which provides adequate security, but we still need a solution for customers that can't or won't use x509. My intention is to store authorization information using cookies (or, potentially, using local storage, degrading to flash cookies, and then normal cookies). At First Blush Track two separate values (local data or cookies): a hash representing a secure sign-on token, as well as a device token. Both values are driven (and recorded) by the web application, and dictated to the client. The SSO token is dependent on the device as well as a sequence number. This effectively allows devices to be deauthorized (all SSO tokens become invalid) and mitigates replay (not effectively, though, which is why I'm asking this question) through the use of a sequence number, and uses a nonce. Problem With this solution, it's possible for someone to just copy the SSO and device tokens and use in another request. While the sequence number will help me detect such an abuse and thus deauthorize the device, the detection and response can only happen after the valid device and malicious request both attempt access, which is ample time for damage to be done. I feel like using HMAC would be better. Track the device, the sequence, create a nonce, timestamp, and hash with a private key, then send the hash plus those values as plain text. Server does the same (in addition to validating the device and sequence) and compares. That seems much easier, and much more reliable.... assuming we can securely negotiate, exchange, and store private keys. Question So then, how can I securely negotiate a private key for authorized device, and then securely store that key? Is it more possible, at least, if I settle for storing the private key using local storage or flash cookies and just say it's "good enough"? Or, is there something I can do to my original draft to mitigate the vulnerability I describe?

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  • Guides for PostgreSQL query tuning?

    - by Joe
    I've found a number of resources that talk about tuning the database server, but I haven't found much on the tuning of the individual queries. For instance, in Oracle, I might try adding hints to ignore indexes or to use sort-merge vs. correlated joins, but I can't find much on tuning Postgres other than using explicit joins and recommendations when bulk loading tables. Do any such guides exist so I can focus on tuning the most run and/or underperforming queries, hopefully without adversely affecting the currently well-performing queries? I'd even be happy to find something that compared how certain types of queries performed relative to other databases, so I had a better clue of what sort of things to avoid. update: I should've mentioned, I took all of the Oracle DBA classes along with their data modeling and SQL tuning classes back in the 8i days ... so I know about 'EXPLAIN', but that's more to tell you what's going wrong with the query, not necessarily how to make it better. (eg, are 'while var=1 or var=2' and 'while var in (1,2)' considered the same when generating an execution plan? What if I'm doing it with 10 permutations? When are multi-column indexes used? Are there ways to get the planner to optimize for fastest start vs. fastest finish? What sort of 'gotchas' might I run into when moving from mySQL, Oracle or some other RDBMS?) I could write any complex query dozens if not hundreds of ways, and I'm hoping to not have to try them all and find which one works best through trial and error. I've already found that 'SELECT count(*)' won't use an index, but 'SELECT count(primary_key)' will ... maybe a 'PostgreSQL for experienced SQL users' sort of document that explained sorts of queries to avoid, and how best to re-write them, or how to get the planner to handle them better. update 2: I found a Comparison of different SQL Implementations which covers PostgreSQL, DB2, MS-SQL, mySQL, Oracle and Informix, and explains if, how, and gotchas on things you might try to do, and his references section linked to Oracle / SQL Server / DB2 / Mckoi /MySQL Database Equivalents (which is what its title suggests) and to the wikibook SQL Dialects Reference which covers whatever people contribute (includes some DB2, SQLite, mySQL, PostgreSQL, Firebird, Vituoso, Oracle, MS-SQL, Ingres, and Linter).

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  • Infinite loop using Spring Security - Login page is protected even though it should allow anonymous

    - by Tai Squared
    I have a Spring application (Spring version 2.5.6.SEC01, Spring Security version 2.0.5) with the following setup: web.xml <welcome-file-list> <welcome-file> index.jsp </welcome-file> </welcome-file-list> The index.jsp page is in the WebContent directory and simply contains a redirect: <c:redirect url="/login.htm"/> In the appname-servlet.xml, there is a view resolver to point to the jsp pages in WEB-INF/jsp <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="viewClass" value="org.springframework.web.servlet.view.JstlView" /> <property name="prefix" value="/WEB-INF/jsp/" /> <property name="suffix" value=".jsp" /> </bean> In the security-config.xml file, I have the following configuration: <http> <!-- Restrict URLs based on role --> <intercept-url pattern="/WEB-INF/jsp/login.jsp*" access="ROLE_ANONYMOUS" /> <intercept-url pattern="/WEB-INF/jsp/header.jsp*" access="ROLE_ANONYMOUS" /> <intercept-url pattern="/WEB-INF/jsp/footer.jsp*" access="ROLE_ANONYMOUS" /> <intercept-url pattern="/login*" access="ROLE_ANONYMOUS" /> <intercept-url pattern="/index.jsp" access="ROLE_ANONYMOUS" /> <intercept-url pattern="/logoutSuccess*" access="ROLE_ANONYMOUS" /> <intercept-url pattern="/css/**" filters="none" /> <intercept-url pattern="/images/**" filters="none" /> <intercept-url pattern="/**" access="ROLE_ANONYMOUS" /> <form-login login-page="/login.jsp"/> </http> <authentication-provider> <jdbc-user-service data-source-ref="dataSource" /> </authentication-provider> However, I can't even navigate to the login page and get the following error in the log: WARNING: The login page is being protected by the filter chain, but you don't appear to have anonymous authentication enabled. This is almost certainly an error. I've tried changing the ROLE_ANONYMOUS to IS_AUTHENTICATED_ANONYMOUSLY, changing the login-page to index.jsp, login.htm, and adding different intercept-url values, but I can't get it so the login page is accesible and security applies to the other pages. What do I have to change to avoid this loop?

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  • ListView item won't extend width to fill_parent

    - by slybloty
    I have a custom ViewGroup that inflates a ListView from an xml layout. The list item layout is inflated from another xml file. All of the views are set to fill_parent. The ListView fills its parent, but the ListView items don't. I've tried putting the ListView in a LinearLayout and assigning weight to it. Tried RelativeLayout as well. Also, I've built the ListView programmaticaly, without using the xml layout. Even changed the LayoutParams before adding the view to the ViewGroup. I've also taken in consideration these posts as well: Width of clickable area in ListView w/ onListItemClick, In Android, how can I set a ListView item's height and width?, Android Listview width prob. Any ideas to why the items don't extend to fill width? And how to extend them? MyViewGroup class: public class MyViewGroup extends ViewGroup { public MyViewGroup(Context context, AttributeSet attrs) { super(context, attrs); generateMyViewGroup(); } private void generateMyViewGroup() { ListView main = (ListView) View.inflate(getContext(), R.layout.layout_main, null); main.setAdapter(new MyAdapter(getContext())); this.addView(main); } @Override protected void onLayout(boolean changed, int l, int t, int r, int b) { this.getChildAt(0).layout(l, t, r, b); } } ListView xml layout: <?xml version="1.0" encoding="utf-8"?> <ListView xmlns:android="http://schemas.android.com/apk/res/android" android:id="@android:id/list" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_marginRight="3dp" android:background="#77000000" android:cacheColorHint="#00000000" android:divider="#00000000" android:dividerHeight="0dp" android:drawSelectorOnTop="false" android:scrollbars="vertical" > </ListView> ListView item layout: <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/layout_main_category" android:layout_width="fill_parent" android:layout_height="wrap_content" android:background="@color/mainBackground" android:gravity="fill_horizontal|center_vertical" android:orientation="vertical" > <TextView android:id="@+id/main_category" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_marginLeft="8dp" android:layout_marginRight="8dp" android:paddingBottom="7dp" android:paddingLeft="20dp" android:paddingRight="5dp" android:paddingTop="20dp" android:text="test" android:textColor="@color/mainCategory" android:textSize="15sp" android:textStyle="bold" /> </LinearLayout>

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  • OpenCV 2.4.2 on Matlab 2012b (Windows 7)

    - by Maik Xhani
    Hello i am trying to use OpenCV 2.4.2 in Matlab 2012b. I have tried those actions: downloaded OpenCV 2.4.2 used CMake on opencv folder using Visual Studio 10 and Visual Studio 10 Win64 compiler built Debug and Release version with Visual Studio first without any other option and then with D_SCL_SECURE=1 specified for every project changed Matlab's mexopts.bat and adding new lines refering to library and include (see bottom for mexopts.bat content) with Visual Studio 10 compiler tried to compile a simple file with a OpenCV library inclusion and all goes well. try to compile something that actually uses OpenCV commands and get errors. I used openmexopencv library and when tried to compile something i get this error cv.make mex -largeArrayDims -D_SECURE_SCL=1 -Iinclude -I"C:\OpenCV\build\include" -L"C:\OpenCV\build\x64\vc10\lib" -lopencv_calib3d242 -lopencv_contrib242 -lopencv_core242 -lopencv_features2d242 -lopencv_flann242 -lopencv_gpu242 -lopencv_haartraining_engine -lopencv_highgui242 -lopencv_imgproc242 -lopencv_legacy242 -lopencv_ml242 -lopencv_nonfree242 -lopencv_objdetect242 -lopencv_photo242 -lopencv_stitching242 -lopencv_ts242 -lopencv_video242 -lopencv_videostab242 src+cv\CamShift.cpp lib\MxArray.obj -output +cv\CamShift CamShift.cpp C:\Program Files\MATLAB\R2012b\extern\include\tmwtypes.h(821) : warning C4091: 'typedef ': ignorato a sinistra di 'wchar_t' quando non si dichiara alcuna variabile c:\program files\matlab\r2012b\extern\include\matrix.h(319) : error C4430: identificatore di tipo mancante, verr… utilizzato int. Nota: default-int non Š pi— supportato in C++ the content of my mexopts.bat is @echo off rem MSVC100OPTS.BAT rem rem Compile and link options used for building MEX-files rem using the Microsoft Visual C++ compiler version 10.0 rem rem $Revision: 1.1.6.4.2.1 $ $Date: 2012/07/12 13:53:59 $ rem Copyright 2007-2009 The MathWorks, Inc. rem rem StorageVersion: 1.0 rem C++keyFileName: MSVC100OPTS.BAT rem C++keyName: Microsoft Visual C++ 2010 rem C++keyManufacturer: Microsoft rem C++keyVersion: 10.0 rem C++keyLanguage: C++ rem C++keyLinkerName: Microsoft Visual C++ 2010 rem C++keyLinkerVersion: 10.0 rem rem ******************************************************************** rem General parameters rem ******************************************************************** set MATLAB=%MATLAB% set VSINSTALLDIR=c:\Program Files (x86)\Microsoft Visual Studio 10.0 set VCINSTALLDIR=%VSINSTALLDIR%\VC set OPENCVDIR=C:\OpenCV rem In this case, LINKERDIR is being used to specify the location of the SDK set LINKERDIR=c:\Program Files (x86)\Microsoft SDKs\Windows\v7.0A\ set PATH=%VCINSTALLDIR%\bin\amd64;%VCINSTALLDIR%\bin;%VCINSTALLDIR%\VCPackages;%VSINSTALLDIR%\Common7\IDE;%VSINSTALLDIR%\Common7\Tools;%LINKERDIR%\bin\x64;%LINKERDIR%\bin;%MATLAB_BIN%;%PATH% set INCLUDE=%OPENCVDIR%\build\include;%VCINSTALLDIR%\INCLUDE;%VCINSTALLDIR%\ATLMFC\INCLUDE;%LINKERDIR%\include;%INCLUDE% set LIB=%OPENCVDIR%\build\x64\vc10\lib;%VCINSTALLDIR%\LIB\amd64;%VCINSTALLDIR%\ATLMFC\LIB\amd64;%LINKERDIR%\lib\x64;%MATLAB%\extern\lib\win64;%LIB% set MW_TARGET_ARCH=win64 rem ******************************************************************** rem Compiler parameters rem ******************************************************************** set COMPILER=cl set COMPFLAGS=/c /GR /W3 /EHs /D_CRT_SECURE_NO_DEPRECATE /D_SCL_SECURE_NO_DEPRECATE /D_SECURE_SCL=0 /DMATLAB_MEX_FILE /nologo /MD set OPTIMFLAGS=/O2 /Oy- /DNDEBUG set DEBUGFLAGS=/Z7 set NAME_OBJECT=/Fo rem ******************************************************************** rem Linker parameters rem ******************************************************************** set LIBLOC=%MATLAB%\extern\lib\win64\microsoft set LINKER=link set LINKFLAGS=/dll /export:%ENTRYPOINT% /LIBPATH:"%LIBLOC%" libmx.lib libmex.lib libmat.lib /MACHINE:X64 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib opencv_calib3d242.lib opencv_contrib242.lib opencv_core242.lib opencv_features2d242.lib opencv_flann242.lib opencv_gpu242.lib opencv_haartraining_engine.lib opencv_imgproc242.lib opencv_highgui242.lib opencv_legacy242.lib opencv_ml242.lib opencv_nonfree242.lib opencv_objdetect242.lib opencv_photo242.lib opencv_stitching242.lib opencv_ts242.lib opencv_video242.lib opencv_videostab242.lib /nologo /manifest /incremental:NO /implib:"%LIB_NAME%.x" /MAP:"%OUTDIR%%MEX_NAME%%MEX_EXT%.map" set LINKOPTIMFLAGS= set LINKDEBUGFLAGS=/debug /PDB:"%OUTDIR%%MEX_NAME%%MEX_EXT%.pdb" set LINK_FILE= set LINK_LIB= set NAME_OUTPUT=/out:"%OUTDIR%%MEX_NAME%%MEX_EXT%" set RSP_FILE_INDICATOR=@ rem ******************************************************************** rem Resource compiler parameters rem ******************************************************************** set RC_COMPILER=rc /fo "%OUTDIR%mexversion.res" set RC_LINKER= set POSTLINK_CMDS=del "%LIB_NAME%.x" "%LIB_NAME%.exp" set POSTLINK_CMDS1=mt -outputresource:"%OUTDIR%%MEX_NAME%%MEX_EXT%;2" -manifest "%OUTDIR%%MEX_NAME%%MEX_EXT%.manifest" set POSTLINK_CMDS2=del "%OUTDIR%%MEX_NAME%%MEX_EXT%.manifest" set POSTLINK_CMDS3=del "%OUTDIR%%MEX_NAME%%MEX_EXT%.map"

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  • WPF: Binding to ObservableCollection in ControlTemplate is not updated

    - by Julian Lettner
    I created a ControlTemplate for my custom control MyControl. MyControl derives from System.Windows.Controls.Control and defines the following property public ObservableCollection<MyControl> Children{ get; protected set; }. To display the nested child controls I am using an ItemsControl (StackPanel) which is surrounded by a GroupBox. If there are no child controls, I want to hide the GroupBox. Everything works fine on application startup: The group box and child controls are shown if the Children property initially contained at least one element. In the other case it is hidden. The problem starts when the user adds a child control to an empty collection. The GroupBox's visibility is still collapsed. The same problem occurs when the last child control is removed from the collection. The GroupBox is still visible. Another symptom is that the HideEmptyEnumerationConverter converter does not get called. Adding/removing child controls to non empty collections works as expected. Whats wrong with the following binding? Obviously it works once but does not get updated, although the collection I am binding to is of type ObservableCollection. <!-- Converter for hiding empty enumerations --> <Common:HideEmptyEnumerationConverter x:Key="hideEmptyEnumerationConverter"/> <!--- ... ---> <ControlTemplate TargetType="{x:Type MyControl}"> <!-- ... other stuff that works ... --> <!-- Child components --> <GroupBox Header="Children" Visibility="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=Children, Converter={StaticResource hideEmptyEnumerationConverter}}"> <ItemsControl ItemsSource="{TemplateBinding Children}"/> </GroupBox> </ControlTemplate> . [ValueConversion(typeof (IEnumerable), typeof (Visibility))] public class HideEmptyEnumerationConverter : IValueConverter { #region IValueConverter Members public object Convert(object value, Type targetType, object parameter, CultureInfo culture) { int itemCount = ((IEnumerable) value).Cast<object>().Count(); return itemCount == 0 ? Visibility.Collapsed : Visibility.Visible; } public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) { throw new NotImplementedException(); } #endregion } Another, more general question: How do you guys debug bindings? Found this (http://bea.stollnitz.com/blog/?p=52) but still I find it very hard to do. I am glad for any help or suggestion.

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  • Admob in iPhone with Tabbar and TableView

    - by satyam
    I'm having tab bar with 5 buttons. Out of 5 tabs, 2 are table views which uses navigation controller for showing sub views on click of cell. Above the tab bar, in each view I left some space for ads using "Admob". I'm adding ads using IB. But its giving EXC_BAD_ACCESS when its reaching "adMobAd = [AdMobView requestAdWithDelegate:self];" in AdViewController.m I'm using following lines of code to add views to tab bar view. In my code, I just added ads to LatestNews only. Can some one help me out of this problem. UINavigationController *localNavigationController; // create tab bar controller and array to hold the view controllers tabBarController = [[UITabBarController alloc] init]; NSMutableArray *localControllersArray = [[NSMutableArray alloc] initWithCapacity:5]; // setup the first view controller (Root view controller) LatestNews* latestNewsController; latestNewsController = [[LatestNews alloc] initWithTabBar]; // create the nav controller and add the root view controller as its first view localNavigationController = [[UINavigationController alloc] initWithRootViewController:latestNewsController]; // add the new nav controller (with the root view controller inside it) // to the array of controllers [localControllersArray addObject:localNavigationController]; // release since we are done with this for now [localNavigationController release]; [latestNewsController release]; // setup the second view controller just like the first Forums* forumsController; forumsController = [[Forums alloc] initWithTabBar]; localNavigationController = [[UINavigationController alloc] initWithRootViewController:forumsController]; [localControllersArray addObject:localNavigationController]; [localNavigationController release]; [forumsController release]; RecipeList* recipesController = [[RecipeList alloc] initWithTabBar]; localNavigationController = [[UINavigationController alloc] initWithRootViewController:recipesController]; [localControllersArray addObject:localNavigationController]; [localNavigationController release]; [recipesController release]; //Setup Connect view Connect* cnt = [[Connect alloc] initWithTabBar]; [localControllersArray addObject:cnt]; [cnt release]; //Setup Subscribe View Subscribe* scribe = [[Subscribe alloc] initWithTabBar]; [localControllersArray addObject:scribe]; [scribe release]; // load up our tab bar controller with the view controllers tabBarController.viewControllers = localControllersArray; [localControllersArray release]; [window addSubview:tabBarController.view]; [window makeKeyAndVisible];

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  • Haskell newbie on types

    - by garulfo
    I'm completely new to Haskell (and more generally to functional programming), so forgive me if this is really basic stuff. To get more than a taste, I try to implement in Haskell some algorithmic stuff I'm working on. I have a simple module Interval that implements intervals on the line. It contains the type data Interval t = Interval t t the helper function makeInterval :: (Ord t) => t -> t -> Interval t makeInterval l r | l <= r = Interval l r | otherwise = error "bad interval" and some utility functions about intervals. Here, my interest lies in multidimensional intervals (d-intervals), those objects that are composed of d intervals. I want to separately consider d-intervals that are the union of d disjoint intervals on the line (multiple interval) from those that are the union of d interval on d separate lines (track interval). With distinct algorithmic treatments in mind, I think it would be nice to have two distinct types (even if both are lists of intervals here) such as import qualified Interval as I -- Multilple interval newtype MInterval t = MInterval [I.Interval t] -- Track interval newtype TInterval t = TInterval [I.Interval t] to allow for distinct sanity checks, e.g. makeMInterval :: (Ord t) => [I.Interval t] -> MInterval t makeMInterval is = if foldr (&&) True [I.precedes i i' | (i, i') <- zip is (tail is)] then (MInterval is) else error "bad multiple interval" makeTInterval :: (Ord t) => [I.Interval t] -> TInterval t makeTInterval = TInterval I now get to the point, at last! But some functions are naturally concerned with both multiple intervals and track intervals. For example, a function order would return the number of intervals in a multiple interval or a track interval. What can I do? Adding -- Dimensional interval data DInterval t = MIntervalStuff (MInterval t) | TIntervalStuff (TInterval t) does not help much, since, if I understand well (correct me if I'm wrong), I would have to write order :: DInterval t -> Int order (MIntervalStuff (MInterval is)) = length is order (TIntervalStuff (TInterval is)) = length is and call order as order (MIntervalStuff is) or order (TIntervalStuff is) when is is a MInterval or a TInterval. Not that great, it looks odd. Neither I want to duplicate the function (I have many functions that are concerned with both multiple and track intevals, and some other d-interval definitions such as equal length multiple and track intervals). I'm left with the feeling that I'm completely wrong and have missed some important point about types in Haskell (and/or can't forget enough here about OO programming). So, quite a newbie question, what would be the best way in Haskell to deal with such a situation? Do I have to forget about introducing MInterval and TInterval and go with one type only? Thanks a lot for your help, Garulfo

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  • Autoconf (newbie) -- building with static library

    - by EB
    I am trying to migrate from manual build to autoconf, which is working very nicely so far. But I have one static library that I can't figure out how to integrate. That library will NOT be located in the usual library locations - the location of the binary (.a file) and header (.h file) will be given as a configure argument. (Notably, even if I move the .a file to /usr/lib or anywhere else I can think of, it still won't work.) Manual compilation is working with these: gcc ... -I/path/to/header/file/directory /full/path/to/the/.a/file/itself (Uh, I actually don't understand why the .a file is referenced directly, not with -L or anything. Yes, I have a half-baked understanding of building C programs.) I can use the configure argument to successfully find the header (.h file) using AC_CHECK_HEADER. Inside the AC_CHECK_HEADER I then add the location to CPFLAGS and the #include of the header file in the actual C code picks it up nicely. Given a configure argument that has been put into $location and the name of the needed files are myprog.h and myprog.a (which are both in the same directory), here is what works so far: AC_CHECK_HEADER([$location/myprog.h], [AC_DEFINE([HAVE_MYPROG_H], [1], [found myprog.h]) CFLAGS="$CFLAGS -I$location"]) Where I run into difficulties is getting the binary (.a file) linked in. No matter what I try, I always get an error about undefined references to the function calls for that library. I'm pretty sure it's a linkage issue, because I can fuss with the C code and make an intentional error in the function calls to that library which produces earlier errors that indicate that the function prototypes have been loaded and used to compile. I tried adding the location that contains the .a file to LDFLAGS and then doing a AC_CHECK_LIB but it is not found. Maybe my syntax is wrong, or maybe I'm missing something more fundamental, which would not be surprising since I'm a newbie and don't really know what I'm doing. Here is what I have tried: AC_CHECK_HEADER([$location/myprog.h], [AC_DEFINE([HAVE_MYPROG_H], [1], [found myprog.h]) CFLAGS="$CFLAGS -I$location"; LDFLAGS="$LDFLAGS -L$location"; AC_CHECK_LIB(myprog)]) No dice. AC_CHECK_LIB is looking for -lmyprog I guess (or libmyprog?) so I'm not sure if that's a problem, so I tried this, too (omit AC_CHECK_LIB and include the .a directly in LDFLAGS), without luck: AC_CHECK_HEADER([$location/myprog.h], [AC_DEFINE([HAVE_MYPROG_H], [1], [found myprog.h]) CFLAGS="$CFLAGS -I$location"; LDFLAGS="$LDFLAGS -L$location/myprog.a"]) To emulate the manual compilation, I tried removing the -L but that doesn't help: AC_CHECK_HEADER([$location/myprog.h], [AC_DEFINE([HAVE_MYPROG_H], [1], [found myprog.h]) CFLAGS="$CFLAGS -I$location"; LDFLAGS="$LDFLAGS $location/myprog.a"]) I tried other combinations and permutations, but I think I might be missing something more fundamental....

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  • WebHttpBinding: Log all errors to service logfile

    - by W van Noort
    I have a self-hosted WCF service that uses a WebHttpBinding. In the implementation of the service, all exceptions are caught and a appropriate message is returned to the caller. All exceptions are also logged to the service logfile. catch (Exception ex) { _log.Error("Error posting message", ex); WebOperationContext.Current.OutgoingResponse.StatusCode = HttpStatusCode.InternalServerError; return string.Format("{0}:error={1}", (int)HttpStatusCode.InternalServerError, ex.Message); } However, some situations are intercepted by the WCF framework. e.g.: when the client sends a message that exceeds the configured quotum, i never get an entry in my log file. In fact, i only found this, by adding this to the config file, and inspecting the generated trace file. <system.diagnostics> <sources> <source name="System.ServiceModel" switchValue="Information, ActivityTracing" propagateActivity="true"> <listeners> <add name="xml" /> </listeners> </source> <source name="CardSpace"> <listeners> <add name="xml" /> </listeners> </source> <source name="System.IO.Log"> <listeners> <add name="xml" /> </listeners> </source> <source name="System.Runtime.Serialization"> <listeners> <add name="xml" /> </listeners> </source> <source name="System.IdentityModel"> <listeners> <add name="xml" /> </listeners> </source> </sources> <sharedListeners> <add name="xml" type="System.Diagnostics.XmlWriterTraceListener" initializeData="c:\test\Traces.svclog" /> </sharedListeners> Is there a way to get these kind of errors visible in my own logfile?

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  • Rails - embedded polymorphic comment list + add comment form - example?

    - by odigity
    Hey, all. Working on my first Rails app. I've searched all around - read a bunch of tutorials, articles, and forum posts, watched some screencasts, and I've found a few examples that come close to what I'm trying to do (notably http://railscasts.com/episodes/154-polymorphic-association and ep 196 about nested model forms), but not exactly. I have two models (Podcast and BlogPost) that need to be commentable, and I have a Comment model that is polymorphically related to both. The railscasts above had a very similar example (ep 154), but Ryan used a full set of nested routes, so there were specific templates for adding and editing comments. What I want to do is show the list of comments right on the Podcast or BlogPost page, along with an Add Comment form at the bottom. I don't need a separate add template/route, and I don't need the ability to edit, only delete. This is a pretty common design on the web, but I can't find a Rails example specifically about this pattern. Here's my current understanding: I need routes for the create and delete actions, of course, but there are no templates associated with those. I'm also guessing that the right approach is to create a partial that can be included at the bottom of both the Podcast and BlogPost show template. The logical name for the partial seems to me to be something like _comments.html.haml. I know it's a common convention to have the object passed to the partial be named after the template, but calling the object 'comments' seems to not match my use case, since what I really need to pass is the commentable object (Podcast or BlogPost). So, I guess I'd use the locals option for the render partial call? (:commentable = @podcast). Inside the partial, I could call commentable.comments to get the comments collection, render that with a second partial (this time with the conventional use case, calling the partial _comment.html.haml), then create a form that submits to... what? REST-wise, it should be a POST to the collection, which would be /podcast|blogpost/:id/comments, and I think the helper for that is podcast_comments_path(podcast) if it were a podcast - not sure what to do though, since I'm using polymorphic comments. That would trigger the Comment.create action, which would then need to redirect back to the podcast|blogpost path /podcast|blogpost/:id. It's all a bit overwhelming, which is why I was really hoping to find a screencast or example that specifically implements this design.

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  • IronPython and Nodebox in C#

    - by proxylittle
    My plan: I'm trying to setup my C# project to communicate with Nodebox to call a certain function which populates a graph and draws it in a new window. Current situation: [fixed... see Update2] I have already included all python-modules needed, but im still getting a Library 'GL' not found it seems that the pyglet module needs a reference to GL/gl.h, but can't find it due to IronPython behaviour. Requirement: The project needs to stay as small as possible without installing new packages. Thats why i have copied all my modules into the project-folder and would like to keep it that or a similar way. My question: Is there a certain workaround for my problem or a fix for the library-folder missmatch. Have read some articles about Tao-Opengl and OpenTK but can't find a good solution. Update1: Updated my sourcecode with a small pyglet window-rendering example. Problem is in pyglet and referenced c-Objects. How do i include them in my c# project to be called? No idea so far... experimenting alittle now. Keeping you updated. SampleCode C#: ScriptRuntimeSetup setup = Python.CreateRuntimeSetup(null); ScriptRuntime runtime = new ScriptRuntime(setup); ScriptEngine engine = Python.GetEngine(runtime); ScriptSource source = engine.CreateScriptSourceFromFile("test.py"); ScriptScope scope = engine.CreateScope(); source.Execute(scope); SampleCode Python (test.py): from nodebox.graphics import * from nodebox.graphics.physics import Vector, Boid, Flock, Obstacle flock = Flock(50, x=-50, y=-50, width=700, height=400) flock.sight(80) def draw(canvas): canvas.clear() flock.update(separation=0.4, cohesion=0.6, alignment=0.1, teleport=True) for boid in flock: push() translate(boid.x, boid.y) scale(0.5 + boid.depth) rotate(boid.heading) arrow(0, 0, 15) pop() canvas.size = 600, 300 def main(canvas): canvas.run(draw) Update2: Line 139 [pyglet/lib.py] sys.platform is not win32... there was the error. Fixed it by just using the line: from pyglet.gl.lib_wgl import link_GL, link_GLU, link_WGL Now the following Error: 'module' object has no attribute '_getframe' Kind of a pain to fix it. Updating with results... Update3: Fixed by adding following line right after first line in C#-Code: setup.Options["Frames"] = true; Current Problem: No module named unicodedata, but in Python26/DLLs is only a *.pyd file`. So.. how do i implement it now?!

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  • System.IO.IOException: file used by another process

    - by Srodriguez
    Dear all, I've been working in this small piece of code that seems trivial but still i cannot really see where is the problem. My functions does a pretty simple thing. Opens a file, copy its contents, replace a string inside and copy it back to the original file (a simple search and replace inside a text file then). I didn't really know how to do that as I'm adding lines to the original file, so i just create a copy of the file, (file.temp) copy also a backup (file.temp) then delete the original file(file) and copy the file.temp to file. I get an exception while doing the delete of the file. Here is the sample code: private static bool modifyFile(FileInfo file, string extractedMethod, string modifiedMethod) { Boolean result = false; FileStream fs = new FileStream(file.FullName + ".tmp", FileMode.Create, FileAccess.Write); StreamWriter sw = new StreamWriter(fs); StreamReader streamreader = file.OpenText(); String originalPath = file.FullName; string input = streamreader.ReadToEnd(); Console.WriteLine("input : {0}", input); String tempString = input.Replace(extractedMethod, modifiedMethod); Console.WriteLine("replaced String {0}", tempString); try { sw.Write(tempString); sw.Flush(); sw.Close(); sw.Dispose(); fs.Close(); fs.Dispose(); streamreader.Close(); streamreader.Dispose(); File.Copy(originalPath, originalPath + ".old", true); FileInfo newFile = new FileInfo(originalPath + ".tmp"); File.Delete(originalPath); File.Copy(fs., originalPath, true); result = true; } catch (Exception ex) { Console.WriteLine(ex); } return result; }` And the related exception System.IO.IOException: The process cannot access the file 'E:\mypath\myFile.cs' because it is being used by another process. at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath) at System.IO.File.Delete(String path) at callingMethod.modifyFile(FileInfo file, String extractedMethod, String modifiedMethod) Normally these errors come from unclosed file streams, but I've taken care of that. I guess I've forgotten an important step but cannot figure out where. Thank you very much for your help,

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