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  • Explain Type Classes in Haskell

    - by Tsubasa Gomamoto
    Hi, I am a C++ / Java programmer and the main paradigm I happen to use in everyday programming is OOP. In some thread I read a comment that Type classes are more intuitive in nature than OOP. Can someone explain the concept of type classes in simple words so that an OOP guy like me can understand it?

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  • PHP Object Oriented forum example

    - by Martin Trigaux
    Hello, I'm trying to learn to use PHP with an object oriented scheme. I think I understand the concept but I need real example, a forum exactly. I know PhpBB but it's maybe too complicated to fully understand it so I'm looking for something simpler but still in object oriented. Thank you

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  • How to do 404 link testing through selenium rc for complete website?

    - by user1726460
    How can i verify a complete website's link(mostly links that are redirecting to 404 page) by using selenium Rc. Previously i tried to do this thong by using xenu and web link validator but in there results most of the links are showing 500 internal serevr error.and for the pages they are showing 500 internal server error the pages actuallt don't exists in the web site. So what is the concept if we can crawl through the website using selenium rc.?

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  • Python: Multi list comprehension, is there such an unwieldy beast of prey ?

    - by bandana
    consider the following python 'code'. it demonstrates the concept of a multi-list comprehension: start = ['a', 'b', 'c'] middle = ['r', 'a', 'a'] finish = ['t', 'r', 't'] l = [s.upper() + m + f for s in start, m in middle, e in finish] >>> print l ['Art', 'Bar', 'Cat'] Alas, the above code does not work in python. What would be a good approximation of multi-list comprehension in python? Please discuss what happens when the lists have different lengths.

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  • question about learning TDD

    - by Gandalf StormCrow
    what are the best books to learn about junit, jmock and testing generally? Currently I'm reading pragmatic unit testing in Java, I'm on chapter 6 its good but it gets complicated.. is there a book for a bottom up? from your expirience which helped you get the testing concept

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  • Execute another program in multi-threaded program

    - by Gary
    Hi, Just wondering how if it's possible to execute another program in a thread and send information to/get information from it. Essentially the same concept as with a child process and using pipes to communicate - however I don't want to use fork. I can't seem to find whether it's possible to do this, any help would be appreciated. Thanks

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  • .Net Windows Service to monitor mailbox

    - by Brent
    Hi there, I need to create a .Net windows service to monitor a mailbox and process attachments (if found) on the emails and then delete the email from the server. I have two questions I'd like your thoughts on: POP3 or IMAP to connect to the mail server? Which POP3/IMAP library should I use. At this stage we're just doing a proof of concept, so a free one would be my preference. Cheers!

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  • Logging a certain event only once in ruby

    - by Andrew Grimm
    Are there any logging frameworks in ruby that allow you to log a specific event type only once? logger = IdealLogger.new logger.log(:happy_path, "We reached the happy path") # => logs this message logger.log(:happy_path, "We reached the happy path yet again") # => Doesn't log this logger.log(:sad_path, "We've encountered a sad path!") # => logs this message Also, is there a term for the concept of logging a certain event type only once?

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  • Public Private Key Encryption Tutorials

    - by Jake M
    Do you know of a tutorial that demonstrates Public Private Key encryption(PPKE) in C++ or C? I am trying to learn how it works and eventually use Crypto++ to create my own encryptions using public private keys. Maybe theres a Crypto++ PPKE tutorial? Maybe someone can explain the relationship(if any) between the public and private keys? Could anyone suggest some very simple public and private key values I could use(like 'char*32','char/32') to create my simple PPKE program to understand the concept?

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  • Web Application Auditing

    - by Adonis L
    How can I audit a web application specifically database changes, when the application is connecting to the database as a system account? I would like to use a simple database trigger to write to an audit table but I am unsure of how I would be able to add the user that is logged on instead of the account that is actually doing the work. I have read a few articles on identity flow but I do not fully understand the concept.

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  • How to Load PDF in silverlight

    - by Srikanth
    Hi....I need to prepare proof-of-concept for a silverlight application. For that I need to load PDF in silverlight. I just need to load PDF in browser and allow the user to perform next, previous, stop and pause actions. Anybody can help out.

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  • Not very objective - please help

    - by chainwork
    I am having trouble understanding the meaning and more importantly the concept of an object as it relates to jQuery. I understand the basics that its a collection of data that comes in two forms, properties and methods but I kind of get lost on how it works beyond that. Can anyone point me to some good tutorials that maybe helped you understand? I'm hoping to "Get it" once and for all. Many many thanks for your help! =]

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  • Load image from string

    - by zaf
    Given a string containing jpeg image data, is it possible to load this directly in pygame? I've tried using StringIO but failed and I don't completely understand the 'file-like' object concept. Currently, as a workaround, I'm saving to disk and then loading an image the standard way: # imagestring contains a jpeg f=open('test.jpg','wb') f.write(imagestring) f.close() image=pygame.image.load('test.jpg') Any suggestions on improving this so that we avoid creating a temp file?

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  • How to change the language of application in iphone

    - by Prash.......
    hi, I am developing an application, in which i am giving user to select other language , by default the application will be in English , if user selects other language from the list. The application language should be get changed to the respective language. I know the concept of Localization, but if there any way to do that, if i want to do that using localization please suggest me proper steps for that. please suggest me solution for that.

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  • how to connect SQL Server cubes using dotnet(C#)

    - by prince23
    Hi. I am new to this cubes concept in SQL Server. I need to connect to cubes and query and get a result and display that result in grid view Any help would be great telling how to connect to a cube, articles on it, code any thing that can help me to achieve the result Thank you.

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  • C++ equivalent to Python's doctests?

    - by drcraig
    I think the concept of Python's doctests is brilliant, and as a C++ programmer at a real-time shop, I'm quite jealous. We basically have no unit test capability, which is a severe hindrance. I've seen C++Unit, etc, but is there anything that can extract test cases out of comments like Python's doctests rather than putting them in the code directly?

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  • back button is working on emulator but it is not working in device in android

    - by Rajeevgandhi
    Hi all, am new to this android development. I have index page and am displaying every links in the same page using div concept. Now i want to use the back button for my application i have developed code to handle the div and it is working in the AVD(Andriod Virtual Device 5556) but if i upload the apk into my device it is not working. Am waiting for your reply Please help me...... Thanks, Rajeevgandhi. S

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  • Javascript plugins design pattern like jQuery

    - by Marco Demaio
    Could someone write down a very simple basic example in javascript to conceptualize (and hopefully make me understand) how the jQuery plugin design pattern is done and how it works? I'm not interested in how creating plugin for jQuery (so no jQuery code here at all). I'm interested in a simple explanation (maybe with a bit of Javascript code) to explain how it is done the plugin concept. Plz do not reply me to go and read jQuery code, I tried, but I it's too complex, otherwise I would have not post a question here.

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  • Is there already FUSE filesystem that serialise each request to stream?

    - by Vi
    Concept: nc -lp 1234 -e fusexmp_server nc 127.0.0.1 1234 -c "fusestream /mnt/tmp" Advantages are: Easy implementation of servers in high level language (without need of any arch-dependent things like JNI or whatever) Simple ad-hoc networking filesystem out of the box. Accessibility without actual FUSE (when it is inaccessible): nc -lp 1234 -e fusexmp_server& fakefusestream 127.0.0.1 1234 % ls bin lib usr proc etc % get /etc/hosts % exit Is there already such thing or I should implement it?

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