Using WinGHCi to implement first Haskell program

Question

This is not my code :

import Data.Monoid (Endo (..), appEndo)
import Data.Foldable (foldMap)

-- | chainEndos chain a list of endomorphisms to create a new one
-- Point-free version is feasible and redable.
-- Level: Easy
--
-- Examples:
--
-- >>> chainEndos [(+1),(*3)] 2
-- 7
-- >>> chainEndos [('h':),('e':)] "llo"
-- "hello"
--
-- >>> chainEndos [] (12 :: Int)
-- 12
--
chainEndos :: [a->a] -> a -> a
chainEndos = appEndo . foldMap Endo

chainEndos' :: [a->a] -> a -> a
chainEndos' = foldr (.) id

main = print $ chainEndos [('h':),('e':)] "llo"

I would like to run this in the Haskell IDE : http://www.haskell.org/platform/

But WinGhci offers just a repl like structure ? How can I load this as haskell file and run it ?

The Haskell Platform isn't an IDE. It provides GHC, a compiler, and GHCi, an interactive REPL, along with a set of libraries. Are you wanting to compile this code into an executable? Just do ghc --make myFile.hs. If you want to load it into GHCi interactively, run ghci, then type :l path/to/myFile.hs. — bheklilr
– bheklilr, Commented Mar 5, 2014 at 22:18
@bheklilr WinGhci is included in the Haskell Platform for Windows, and has a graphical interface for loading files and the like (see Heather's answer). It's not a full IDE though. Of course, being a wrapper over ghci, your :l command will also work in it. — Ørjan Johansen
– Ørjan Johansen, Commented Mar 6, 2014 at 22:16

cnd · Accepted Answer · 2014-03-06 05:04:46Z

1

Save it to file, then

File -> Load

that's all, after it you can call main

answered Mar 6, 2014 at 5:04

cnd

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