Misc.hs

-- |
-- Module      :  ELynx.Tools.Misc
-- Copyright   :  (c) Dominik Schrempf 2020
-- License     :  GPL-3.0-or-later
--
-- Maintainer  :  dominik.schrempf@gmail.com
-- Stability   :  unstable
-- Portability :  portable
--
-- Creation date: Thu Feb 14 13:32:19 2019.
--
-- Miscellaneous tools that do not have their own category (yet).
module ELynx.Tools.Misc
  ( -- * Weird stuff
    compose,
    allValues,
    horizontalConcat,
  )
where

import Data.List

-- | Chain a list of functions together. See https://wiki.haskell.org/Compose.
compose :: [a -> a] -> a -> a
compose = foldl (flip (.)) id

-- | Get all values of a bounded enumerated type.
allValues :: (Bounded a, Enum a) => [a]
allValues = [minBound ..]

-- | A brain f***. As an example, let @xss@ be a list of alignments (i.e., a
-- list of a list of a list of alleles). This function horizontally concatenates
-- the sites. The number of species needs to be same in each alignment. No
-- checks are performed!
horizontalConcat :: [[[a]]] -> [[a]]
horizontalConcat [xs] = xs
horizontalConcat xss = foldl' (zipWith (++)) (head xss) (tail xss)