hsfm/src/HSFM/Utils/MyPrelude.hs

{--
HSFM, a filemanager written in Haskell.
Copyright (C) 2016 Julian Ospald

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
version 2 as published by the Free Software Foundation.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
--}

module HSFM.Utils.MyPrelude where


import Data.Default
import Data.List



-- |Turns any list into a list of the same length with the values
-- being the indices.
-- E.g.: "abdasd" -> [0,1,2,3,4,5]
listIndices :: [a] -> [Int]
listIndices = findIndices (const True)


-- |A `maybe` flavor using the `Default` class.
maybeD :: (Default b) => (a -> b) -> Maybe a -> b
maybeD = maybe def