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Javier Neira

Fatvat: Web Sockets and Haskell - 0 views

www.fatvat.co.uk/...web-sockets-and-haskell.html

web socket haskell example toHack webdev

shared by Javier Neira on 05 Jan 10 - No Cached
  • Javier Neira on 05 Jan 10
     
    import Network import System.IO import Control.Concurrent import Char serverHandshake = "HTTP/1.1 101 Web Socket Protocol Handshake\r\n\ \Upgrade: WebSocket\r\n\ \Connection: Upgrade\r\n\ \WebSocket-Origin: http://localhost\r\n\ \WebSocket-Location: ws://localhost:9876/\r\n\ \WebSocket-Protocol: sample\r\n\r\n\0" acceptLoop socket = forever $ do (h,_,_) IO () listenLoop h = do sendFrame h "hello from haskell" threadDelay (3 * 1000000) sendFrame h "it works!" return () sendFrame :: Handle -> String -> IO () sendFrame h s = do hPutChar h (chr 0) hPutStr h s hPutChar h (chr 255)
Javier Neira

Learning Haskell Notes - 0 views

www.ninebynine.org/...Learning-Haskell-Notes.html

haskell learning notes

shared by Javier Neira on 09 Dec 09 - Cached
  • 8. Functors
  • A "functor" is a structured collection (or container) type with a method (fmap) that accepts a method and applies that method to the members of the collection yielding an isomorphic collection of values of a (possibly) new type. Is this right?
  • Every monad is a functor, but not the other way around; a monad is a functor PLUS functions >>= and return satisfying some laws
  • ...4 more annotations...
  • a functor is a type constructor PLUS a function fmap satisfying some laws.
  • I think it's better to use existentials, as they let you define multiple instances for the same type.
  • People tend to forget that the major difference between ADT's and OO-style classes is really only that with a class you can have many instances in the same program simultaneously, whereas with an ADT you can have only one; but the ADT implementation is still interchangeable.
  • sequence :: Monad m => [m a] -> m [a]
Javier Neira

Hoogle - 0 views

haskell.org/hoogle

haskell search api hoogle programming

shared by Javier Neira on 26 Jan 10 - Cached
  • Javier Neira on 26 Jan 10
     
    Hoogle is a Haskell API search engine, which allows you to search many standard Haskell libraries by either function name, or by approximate type signature.
J.A. Alonso

Functional Programming in Haskell (Part 2 : Abstract dataypes and ``infinite'' structures) - 0 views

www.cmi.ac.in/...lecture2.pdf

Haskell tutorial

shared by J.A. Alonso on 14 Sep 11 - No Cached
  • J.A. Alonso on 14 Sep 11
     
    Introducción a la programación en Haskell por Madhavan Mukund
Javier Neira

Leksah - Haskell IDE in Haskell - 0 views

leksah.org/index.html

haskell programming IDE leksah

shared by Javier Neira on 25 Nov 09 - Cached
  • Javier Neira on 25 Nov 09
     
    Leksah is a Haskell IDE (Integrated Development Environment) written in Haskell based on Gtk+ and gtk2hs. Leksah is a practical tool to support the Haskell development process. It is platform independent and runs on any platform where GTK+, gtk2hs and GHC can be installed. It is currently been tested on Windows and Linux but it should work on the Mac. It works with the Glasgow Haskell Compiler (GHC). Leksah is completely free and distributed under the Gnu Public License 2.0
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