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  • it means quick-select algorithm?

    - by matin1234
    Hi, I have a question from my homework. I think my teacher needs an algorithm like quick select for this question is this correct? The question: Following a program (Subroutine) as a "black box" is given (for example, inside it is not clear and we do not even inside it) with the worst case linear time, can find the middle of n elements. Using this black box, get a simple linear algorithm that takes input i and find the element which its rank is equal to i (among the n elements) Thanks.

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  • Vaadin - GWT error "module xxx may need to be recompiled

    - by John Leonard
    I'm ramping up on Vaadin and I'm getting this javascript alert whenever I try and run the demo apps. GWT module 'com.vaadin.terminal.gwt.DefaultWidgetSet' may need to be recompiled I've tried cleaning the project to no avail. As I said, I'm ramping up so I'm sure there's some simple step I'm missing or a concept I haven't grasped.

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  • Samples for RESTful web services for WCF

    - by George2
    Hello everyone, I am new to RESTful web services in WCF, but not new to WCF. I want to develop some simple RESTful web services in WCF which manually be accessed from browser. Any good samples or documents to recommend? I am using C#. thanks in advance, George

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  • Core Data vs. SQLitePersistentObjects

    - by Macatomy
    I'm creating an iPhone app and I'm trying to choose between 2 solutions for a persistent store. Core Data, or SQLitePersistentObjects. Basically, all my app needs is a way to store an array of model objects and then load them again to display in a UITableView. Its nothing too complicated. Core Data seems to have a much higher learning curve than the simple to use SQLitePersistentObjects. Are there any obvious benefits of using Core Data over SQLitePersistentObjects in my case?

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  • open new window javascript

    - by Midhat
    I have a window.open call in a page, whose window itself is opened by a window.open call. So there are 2 windows already on the screen Now On the next window.open call: IE7 opens a new window Firefox opens a new tab in the topmost parent window Chrome opens a new tab in current window Is it possible to make this behaviour same in all three browsers. (preferably like #3) Edit : my call is rly simple javascript:window.open("Attachment.aspx?docid=42")

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  • Class Problem (c++ and prolog)

    - by Joshua Green
    I am using the C++ interface to Prolog (the classes and methods of SWI-cpp.h). For working out a simple backtracking that john likes mary and emma and sara: likes(john, mary). likes(john, emma). likes(john, ashley). I can just do: { PlFrame fr; PlTermv av(2); av[0] = PlCompound("john"); PlQuery q("likes", av); while (q.next_solution()) { cout << (char*)av[1] << endl; } } This works in a separate code, so the syntax is correct. But I am also trying to get this simple backtracking to work within a class: class UserTaskProlog { public: UserTaskProlog(ArRobot* r); ~UserTaskProlog(); protected: int cycles; char* argv[1]; ArRobot* robot; void logTask(); }; This class works fine, with my cycles variable incrementing every robot cycle. However, when I run my main code, I get an Unhandled Exception error message: UserTaskProlog::UserTaskProlog(ArRobot* r) : robotTaskFunc(this, &UserTaskProlog::logTask) { cycles = 0; PlEngine e(argv[0]); PlCall("consult('myFile.pl')"); robot->addSensorInterpTask("UserTaskProlog", 50, &robotTaskFunc); } UserTaskProlog::~UserTaskProlog() { robot->remSensorInterpTask(&robotTaskFunc); // Do I need a destructor here for pl? } void UserTaskProlog::logTask() { cycles++; cout << cycles; { PlFrame fr; PlTermv av(2); av[0] = PlCompound("john"); PlQuery q("likes", av); while (q.next_solution()) { cout << (char*)av[1] << endl; } } } I have my opening and closing brackets for PlFrame. I have my frame, my query, etc... The exact same code that backtracks and prints out mary and emma and sara. What am I missing here that I get an error message? Here is what I think the code should do: I expect mary and emma and sara to be printed out once, every time cycles increments. However, it opens SWI-cpp.h file automatically and points to class PlFrame. What is it trying to tell me? I don't see anything wrong with my PlFrame class declaration. Thanks,

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  • implement alphabetical scroll in MPMediaPickerController app

    - by Pavan
    If you go to the iphone library and then go to songs, you will see the songs being displayed in a similar way to the MPMediaItemPicker class does. The only difference is that the ipod application shows the search bar right at the top of the list and also a nice alphabetical scroll on the right hand side whereas the MPMediaItemPicker class only isplays a simple scroll going up and down. How can i implement an alphabetical scroll on the right in the MPMediaItemPicker class? Can someone please help me.

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  • String formatting named parameters?

    - by Mark
    I know it's a really simple question, but I have no idea how to google it. how can I do print '<a href="%s">%s</a>' % (my_url) So that my_url is used twice? I assume I have to "name" the %s and then use a dict in the params, but I'm not sure of the proper syntax? just FYI, I'm aware I can just use my_url twice in the params, but that's not the point :)

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  • cake's Acl problems...

    - by Gaurav
    I created an application using the method described in the "http:// book.cakephp.org/view/641/Simple-Acl-controlled-Application" but after I try to log in there is an error which says, "DbAcl::allow() - Invalid node [CORE\cake\libs\controller\components\acl.php, line 325]" I did exactly same as mentioned in the website but after loggin in I am given this error msg.. Please help me rectify this. Any help is greatly appreciated..... thanks gaurav sharma

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  • Convincing Management to use WCF

    - by Kyle Rozendo
    Hi All, I asked another question, stating that the I am unable to use WCF in a new Web Service project and have come to see that it seems to be the technology to use in regards to extensibility and security. My question is a simple one: How can I persuade management (and developers for that matter) to move over to using WCF as opposed to other web service technologies (ASMX/CFC)? They won't be concerned with a comparison between the types (especially with regard to ASMX), simply what there is to gain. Thanks for your time, Kyle

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  • Do fluent interfaces violate the Law of Demeter?

    - by Jakub Šturc
    The wikipedia article about Law of Demeter says: The law can be stated simply as "use only one dot". However a simple example of a fluent interface may look like this: static void Main(string[] args) { new ZRLabs.Yael.Pipeline("cat.jpg") .Rotate(90) .Watermark("Monkey") .RoundCorners(100, Color.Bisque) .Save("test.png"); } So does this goes together?

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  • print HTML using php_printer.dll

    - by Ali Bozorgkhan
    I want to print using php_printer.dll. I have no problem printing a simple text but it doesn't print HTML file and it prints the tags like : <-h-t-m-l- <-b-o-d-y- test <-/-b-o-d-y- <-/-h-t-m-l- I don't have any choice other than using php_printer.dll .

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  • Axis web service can't be invoked from web application

    - by jani
    Hi all, I have a simple axis 1.4 web service which I deployed successfully and can invoke it from main method of a Java class. This works fine but when I try to invoke it from a web application it throws an exception saying 'Class not found' for the class 'ws/impl/AwardWebServiceSoapBindingStub'. I tried to debug it but could not find anything. Any help? Thanks in advance. Regards, Jani.

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  • When is it worth using a BindingSource?

    - by Justin
    I think I understand well enough what the BindingSource class does - i.e. provide a layer of indirection between a data source and a UI control. It implements the IBindingList interface and therefore also provides support for sorting. And I've used it frequently enough, without too many problems. But I'm wondering if I use it more often than I should. Perhaps an example would help. Let's say I have just a simple textbox on a form (using WinForms), and I'd like to bind that textbox to a simple property inside a class that returns a string. Is it worth using a BindingSource in this situation? Now let's say I have a grid on my form, and I'd like to bind it to a DataTable. Should I use a BindingSource now? In the latter case, I probably would not use a BindingSource, as a DataTable, from what I can gather, provides the same functionality that the BindingSource itself would. The DataTable will fire the the right events when a row is added, deleted, etc so that the grid will automatically update. But in the first case with the textbox being bound to a string, I would probably have the class that contains the string property implement INotifyPropertyChanged, so that it could fire the PropertyChanged event when the string changes. I would use a BindingSource so that it could listen to these PropertyChanged events so that it could update the textbox automatically when the string changes. How does this sound so far? I still feel like there's a gap in my understanding that's preventing me from seeing the whole picture. This has been a pretty vague question so far, so I'll try to ask some more specific questions - ideally the answers will reference the above examples or something similar... (1) Is it worth using a BindingSource in either of the above examples? (2) It seems that developers just "assume" that the DataTable class will do the right thing, in firing PropertyChanged events at the right time. How does one know if a data source is capable of doing this? Is there a particular interface that a data source should implement in order for developers to be able to assume this behaviour? (3) Does it matter what Control is being bound to, when considering whether or not to use a BindingSource? Or is it only the data source that should affect the decision? Perhaps the answer is (and this would seem logical enough): the Control needs to be intelligent enough to listen to the PropertyChanged events, otherwise a BindingSource is required. So how does one tell if the Control is capable of doing this? Again, is there a particular interface that developers can look for that the Control must implement? It is this confusion that has, in the past, led to me always using a BindingSource. But I'd like to understand better exactly when to use one, so that I do so only when necessary.

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  • Redis autocomplete

    - by Alfred
    Hi, How can I implement an autocomplete using redis? Say for example I have an array ["alfred","joel","jeff","addick"]. When I type a I get ["alfred", "addick"] I hope you get the point. How can I implement this using redis commands efficiently(if possible but I think it is). It would be great if I could get some simple commands I can try out via telnet to mimic this behaviour. Thanks P.S: Merry x-mas to all of you :)

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  • Javascipt select a sentence in textarea

    - by John Adawan
    I'm thinking if there is a way to use javascript to pick up ANY ONE sentence from a textarea simply by clicking any position within that sentence. I'm thinking along the line of - first, get current cursor position (which I know how) - second, somehow locate the position of the previous fullstop and the next fullstop (how?) - take whatever content within the two fullstops. (how?) Or there is a simple way to do it?

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  • jQuery tabs using radio buttons instead of list navigation

    - by caleb
    I'm following a tutorial to create a simple jquery tabs show/hide content. Wondering if there's a way to re-engineer it to use a list of radio buttons instead of a list? Tutorial here: http://www.sohtanaka.com/web-design/simple-tabs-w-css-jquery/ My js: $(".tab_content").hide(); //Hide all content $("ul.tabs li:first").addClass("active").show(); //Activate first tab $(".tab_content:first").show(); //Show first tab content //On Click Event $("ul.tabs li").click(function() { $("ul.tabs li").removeClass("active"); //Remove any "active" class $(this).addClass("active").children("input[@type=radio]").click(); //Add "active" class to selected tab $(".tab_content").hide(); //Hide all tab content var activeTab = "#" + $(this).children("input").attr("value"); //Find the href attribute value to identify the active tab + content $(activeTab).fadeIn(); //Fade in the active ID content return false; }); My HTML: <ul class="tabs"> <li><input type="radio" name="card" id="one" value="gallery" /> <label for="one">gallery</label></li> <li><input type="radio" name="card" id="two" value="submit" /> <label for="two">submit</label></li> <li><input type="radio" name="card" id="three" value="resources" /> <label for="three">resources</label></li> <li><input type="radio" name="card" id="four" value="contact" /> <label for="four">contact</label></li> </ul> <div class="tab_container"> <div id="gallery" class="tab_content"> <h2>Gallery</h2> </div> <div id="submit" class="tab_content"> <h2>Submit</h2> </div> <div id="resources" class="tab_content"> <h2>Resources</h2> </div> <div id="contact" class="tab_content"> <h2>Contact</h2> </div> </div> I'm able to actively select the radio button within the list, but not activate the actual div.

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  • emmulator-5554 issue

    - by sandeep
    Hi When i try running the simple Hello Android program i get the following message in console emulator-5554 disconnected! Cancelling 'com.android.hello.HelloAndroid As a result the program does not run. Can any one help me out of this... Thanks in Advance.. sandeep

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  • remember the highlighted text in html page(add annotation to html page)

    - by ganapati hegde
    Hi, I have an HTML file, i am opening it with webkit,i want to develop an app, such that after opening it, i should be able to select some text and make it highlighted(say by pressing some button 'highlight text' ). And it should remember the highlighted text so that when i open it next time it should highlight the same text automatically...which information i got to store so that i can highlight the same in the next time ? any library is available which makes my work simple?

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  • Display image in Django Form

    - by Mridang Agarwalla
    I need to display an image in a Django form. My Django form is quite simple - a single text input field. When I initialise my Django form in a view, I would like to pass the image path as a parameter, and the form when rendered in the template displays the image. Is is possible with Django forms or would i have to display the image separately? Thanks.

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  • libevent buffered events and half-closed sockets

    - by Vi
    It is simple to implement a port mapper using bufferevent_* functions of libevent. However, the documentation states that "This file descriptor is not allowed to be a pipe(2)". Will libevent work correctly if I shutdown the socket in one direction shutdown(socket, SHUT_WR);? I expect it to discard remaining data in the buffer and not write there anymore, but continue reading from socket and calling a read handler.

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