Sandbox

Feel free to edit as you wish on this page. It is here for you to experiment with WIKI edit syntax.

fooling around

State class (test)

import Control.Monad.State.Lazy

import testm

TADA! this is a link to google, surprisingly

Siers Fri Jun 27 02:36:37 EEST 2014

section

Sandbox#secton
#Links

--Lars 11:14, 27 July 2009 (UTC)

---

$Insertformulahere$Media:Example.oggFile:Example.jpg

Headline text

Italic textBold text

Pavillon

Uge

Uge

Matrix:

$\left[{\begin{matrix}1&2\\3&4\end{matrix}}\right]$

Embedded matrix:

$\left[{\begin{matrix}1&2\\3&\left[{\begin{matrix}5&6\\7&8\end{matrix}}\right]\end{matrix}}\right]$

Links

An internal link. To not exists page abcd. To exists page Haskell

External

http://cs.pdx.edu/

http://cs.pdx.edu/~dick/HaskellSemantics/jpf05.pdf

http://cs.pdx.edu/~dick/HaskellSemantics/Haskell98.pdf

There is no appearance difference between dead link dead and live link live

Text taken from http://hpaste.org/3881: this wiki's syntax highlight at least does not garble the source, unlike hpaste's highlight.

An external link using text instead of the raw link address.

module Main where

import Prelude hiding (putStrLn, print)
import System.IO.UTF8
import Data.List (intersperse, find)

type Персонаж = String
type Персонажи = [Персонаж]

едоки :: Персонажи
едоки = [ "дедка", "бабка", "внучка", "жучка", "кошка", "мышка" ]

подходы :: [ Персонажи ]
подходы = scanl позвать [] едоки
  where позвать тянущие подмога = подмога:тянущие

построились :: Персонажи -> [ (Персонаж, Персонаж) ]
построились едоки = zip едоки ("репка":едоки)

диспозиции = map (построились.reverse) подходы

описать [] = "Посадил дед репку ..."
описать диспозиция = 
  unwords ["Взялись:"
          , concat $ intersperse ", " $ map за диспозиция
          , ". Тянут-потянут -- " ++ result
          ]
  where 
    за (кто,кого) = кто ++ " за " ++ винительный_падеж кого
    винительный_падеж ы = init ы ++ "у"
    result = case find ((=="мышка").fst) диспозиция of
                  Just _  -> "вытянули репку!"
                  Nothing -> "вытянуть не могут!"

main = mapM_ putStrLn $ map описать диспозиции

Section

Subsection

Subsubsection

huhu

Subsubsubsection

tables

basic table

Header 1	Header 2	Header 3
row 1, cell 1	row 1, cell 2	row 1, cell 3
row 2, cell 1	row 2, cell 2	row 2, cell 3

Single Quote

https://github.com/ppelleti/haskell-wiki-bugs/issues/6

This seems to be fixed.

myLast :: [a] -> a
myLast [] = error "No end for empty lists!"
myLast [x] = x
myLast (_:xs) = myLast xs

myLast' = foldr1 (const id)

-- Prelude> const 1 2
-- 1
-- Prelude> (flip const) 1 2
-- 2
myLast'' = foldr1 (flip const)

myLast''' = head . reverse

myLast'''' = foldl1 (curry snd)

myLast''''' [] = error "No end for empty lists!"  
myLast''''' x = x !! (length x -1)

haskelll code without syntax highlight (no ' problem)

 1-- import Prelude
 2import Data.List
 3import Data.Function
 4
 5main :: IO ()
 6main = do
 7  let xs  = [(8,2),(3,2),(3,1),(10,2),(10,6)] :: [(Int,Int)]
 8  print xs
 9  let sortXs' = sort xs
10  print sortXs'

Another syntax highlighting example

import Control.Applicative
import Data.Bits
import Data.IORef
import Data.Word

ioDirA, iPolA, ioCon, gpPuA, gpioA, gpioB, olatA :: Word8

readReg16 :: ReadFunc -> Word8 -> IO Word16
readReg16 rf reg = word8sToWord16 <$> rf reg 2

data RomCode = RomA00 | RomA02
             deriving (Eq, Ord, Show, Read, Bounded, Enum)

Exercises
Why does using this template add this page to the Pages to be removed category?