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  • Dynamicall Rendering in a Scrollable Area

    - by James
    What is the generic algorithm or process that is commonly used to dynamically render portions of a scrolling area? For example, in Google Maps, when the user scrolls past the bounds of the currently rendered area, a grey checkerboard pattern is displayed within the not-yet-rendered portions while the application loads and renders those areas. I'm looking specifically for the approach, or the mathematics, related to filling a graphics area in chunks based on what has just come into view. If possible, I'm looking for anything relevant to the GDI+ process of doing so.

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  • Adding an inheritance to an Qt designed object

    - by Jaguar
    Hello, I have a problem and I want to implement the MVC pattern to my QT application, that's why I need for example to inherite in my QTableWidget about another class like myClass { myMethod(); } but our QTableWidget is contained by our Mainwidows that is designed by the QT designer and generate an ui_MainWindow class ! Do you know how to do that ? Is that a method inside the Qt Designer to do that ? or another method ? Thank you for your answer !

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  • Should I use ICommand or Expression.Interactions InvokeCommand for MVVM in Silverlight 4?

    - by phejndorf
    I'm about to embark on a new project in Silverlight 4, and definitely want to take advantage of the MVVM pattern, now I've finally grasped the basics. For implementing commands in Silverlight 4 it seems there are rather a lot of options ranging from the new built-in Command/ICommand option on the Button, over the InvokeCommand defined in the Microsoft.Expressions.Interactivity namespace and on to the range of assisting MVVM frameworks (Prism, MVVMlight etc). Does anyone here have gotcha's, experience and wisdom to share on this subject?

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  • Best practices for an internal webservice

    - by sankara
    Experience says that using WSDL-SOAP based webservice for internal consumption is an overkill. There are too many service-based POJO classes that when let into the system complicates it way too much. One option would be use adapter pattern, map the request/response objects to internal domain classes and . But is it even required? Is there a better approach? What are your suggestions?

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  • Is it ok to reference .Net assemblies liberally?

    - by panamack
    I'm building a WPF application and working with the MVVM pattern. I have 4 projects in my solution, 3 class libraries, Data, Model and ViewModel and the WPF executable View. Is there anything wrong with the Model referencing WindowsBase so that I can use ObservableCollection<T> for example or can I just make use of what I intuitively feel I need without worrying about the original purposes of the class in the framework e.g. collection databinding.

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  • how to decode quoted-printable using java

    - by shikha
    Hi Can anyone please tell me how to decode quoted-printable using java. Actually i am reading mail from the server and fetching some data from mail using regex.My mail content type is text/html and because of which i am getting html tags along with the data and making very difficult for me to do the pattern matching. it is showing some =20 or =cF etc like characters also. How i can resolve this problem??? Thanks and Regards, Shikha Virmani

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  • Authenticating against a web-service.

    - by Sash
    Did anyone try using a web-service for authentication and at the same time use the web-service as a provider model pattern? Basically, I want to use provider model with authentication against a data-source via a web-service !!! Thanks, Sashidhar Kokku

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  • decorating a function and adding functionalities preserving the number of argument

    - by pygabriel
    I'd like to decorate a function, using a pattern like this: def deco(func): def wrap(*a,**kw): print "do something" return func(*a,**kw) return wrap The problem is that if the function decorated has a prototype like that: def function(a,b,c): return When decorated, the prototype is destroyed by the varargs, for example, calling function(1,2,3,4) wouldn't result in an exception. Is that a way to avoid that? How can define the wrap function with the same prototype as the decorated (func) one? There's something conceptually wrong?

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  • Avoiding dependency carrying

    - by dotnetdev
    When coding, I often come across the following pattern: -A method calls another method (Fine), but the method being called/callee takes parameters, so in the wrapping method, I pass in parameters. Problem is, this dependency carrying can go on and on. How could I avoid this (any sample code appreciated)? Thanks

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  • Split a string by two characters

    - by David
    Hi, Firstable i want to match if a string has the following format: $abc #xyz or $abc .xyz. The abc and xyz mean only alphanumeric string. If it's matched then i need to extract the first $abc and the last #xyz, all that using pure javascript and maybe regex. The pattern is in the following order: Dollar Sign Unlimited alphanumeric string space a hash or point Unlimited alphanumeric string Thanks in advance for any help.

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  • A beginner's log4J question

    - by Nitesh Panchal
    Hello, i configured log4j for basic purpose usin the conversion pattern :- log4j.appender.rollingFile.layout.ConversionPattern=%p %t %c - %m%n But now i want to log the class name from which the error came as well as the username(available in session object) as well as the date and time when that event occurs. How do i do this? What changes do i need to make in format string? Thanks in advance :)

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  • Object Events, how do are they implemented

    - by Malfist
    Events are really awesome, and I wouldn't know what I would do without them, but they're a mystery to me. I'm talking about events in a sense, a function(s) is called if a property, or value, a special event happens. I have only the vaguest idea how these actually work. I know it's an observer pattern, but I don't truly know how it works and/or how to implement it. Can someone explain that to me?

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  • Whats the difference between \z and \Z in a regular expression and when and how do I use it?

    - by Mister M. Bean
    From http://java.sun.com/j2se/1.5.0/docs/api/java/util/regex/Pattern.html: \Z The end of the input but for the final terminator, if any \z The end of the input But what does it mean in practice? Can you give me an example when I use either the \Z or \z. In my test I thought that "StackOverflow\n".matches("StackOverflow\\z") will return true and "StackOverflow\n".matches("StackOverflow\\Z") returns false. But actually both return false. Where is the mistake?

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  • preg_match() find all values inside of table?

    - by mathiregister
    hey guys, a curl function returns a string $widget that contains regular html - two divs where the first div holds a table with various values inside of <td>'s. i wonder what's the easiest and best way for me to extract only all the values inside of the <td>'s so i have blank values without the remaining html. any idea what the pattern for the preg_match should look like? thank you.

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  • UNIX Programs (Shell Scripting) [closed]

    - by atif089
    Hi, I have an exam tomorrow and I need some help with these programs. Or if you can tell me where I can get these. Write a program which uses grep to search a file for a pattern and display search patterns on standard output Write an awk program to print only odd numbered lines of a file. Write a program to open the command ls and give the output to the command through which we count the number of files Thank You :)

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