on :: (b -> b -> c) -> (a -> b) -> a -> a -> c
base Data.Function
(*) `on` f = \x y -> f x * f y. Typical usage: Data.List.sortBy (compare `on` fst). Algebraic properties: * (*) `on` id = (*) (if (*) {, const }) * (*) `on` f) `on` g = (*) `on` (f . *  on f . flip on g = flip on (g . >  
onException :: IO a -> IO b -> IO a
base Control.Exception.Base, base Control.Exception
Like finally, but only performs the final action if there was an exception raised by the computation.
package on-a-horse
Please read the introduction at on-a-horse.org Version 0.3
once :: Testable prop => prop -> Property
QuickCheck Test.QuickCheck.Property, QuickCheck Test.QuickCheck
Modifies a property so that it only will be tested once.
package one-liner
Write short and concise generic instances of type classes. Version 0.2.1
oneLine :: String -> String
QuickCheck Test.QuickCheck.Text
oneOf :: Stream s m Char => [Char] -> ParsecT s u m Char
parsec Text.Parsec.Char, parsec Text.ParserCombinators.Parsec.Char
oneOf cs succeeds if the current character is in the supplied list of characters cs. Returns the parsed character. See also satisfy. > vowel = oneOf "aeiou"
oneof :: [Gen a] -> Gen a
QuickCheck Test.QuickCheck.Gen, QuickCheck Test.QuickCheck
Randomly uses one of the given generators. The input list must be non-empty.
package oneOfN
Anonymous coproduct type (generalization of Either to choices among other than 2 cases) Version
package only
The only command-line tool lets you search based on word patterns or line patterns like never before! Not only can you search with 'only -l patt' but you can select the n-th match with '-l n/patt/' and the next 3 lines with '-l /patt/0:3'. Version
onRose :: (a -> [Rose a] -> Rose a) -> Rose a -> Rose a
QuickCheck Test.QuickCheck.Property
onsideIndent :: PPHsMode -> Indent
haskell-src Language.Haskell.Pretty
indentation added for continuation lines that would otherwise be offside
package onu-course
Based on http://hackage.haskell.org/package/Craft3e Version 1
type OnDecodeError = OnError Word8 Char
text Data.Text.Encoding.Error
A handler for a decoding error.
One :: BlendingFactor
OpenGL Graphics.Rendering.OpenGL.GL.PerFragment
class OneDimensionalTextureTarget t
OpenGL Graphics.Rendering.OpenGL.GL.Texturing.Specification
OneLineMode :: Mode
pretty Text.PrettyPrint.HughesPJ, pretty Text.PrettyPrint, haskell-src Language.Haskell.Pretty
All on one line
OneMinusConstantAlpha :: BlendingFactor
OpenGL Graphics.Rendering.OpenGL.GL.PerFragment
OneMinusConstantColor :: BlendingFactor
OpenGL Graphics.Rendering.OpenGL.GL.PerFragment
OneMinusDstAlpha :: BlendingFactor
OpenGL Graphics.Rendering.OpenGL.GL.PerFragment

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