The Other Prelude

Call for Contribution

This fun project, called "The Other Prelude", and is a creative reconstruction of the standard Prelude. By disregarding history and compatibility, we get a clean sheet.

Naming Conventions

The principal is to make the names very readable for both beginners and category theorists (if any).

Guidelines

• The prelude should not contain any "projection" functions (like fst and snd. They go to the Extension module.

Issues

• Should alphanumeric names be preferred over symbols when defining a class?

The Hierarchy

• TheOtherPrelude - Minimalistic module.
• TheOtherPrelude.Extension - Convenient definitions.

The Code

Currently, the code is in Wiki form. If people do agree that the collaborative decisions begot something pretty, we'll have a group of files in darcs.haskell.org some time.

The imaginery Prelude as it stands,

import Prelude ()    -- hide everything

-- the idea is to remove 'fmap' 
-- and map :: (a -> b) -> [a] -> [b] to be a special case

class Functor f where
  map :: (a -> b) -> f a -> f b


-- should the Functor hierarchy proposal be adopted?
class Monad m where
  (>>=) :: m a -> (a -> m b) -> m b
  (>>) :: m a -> m b -> m b
  return :: a -> m a
  fail :: String -> m a

How to use it, as it stands,

import Prelude ()                            -- hide everything
import TheOtherPrelude                       -- get everything
import qualified TheOtherPrelude.Monad as M  -- standard convention

See Also

• Mathematical prelude discussion - A numeric Prelude. Could this be merged into this one?
• Prelude extensions and Prelude function suggestions - Unlike "The Other Prelude" they enhance the Prelude.
• Functor hierarchy proposal - making "Monad m" imply "Functor m"
• If-then-else - making "if" a function