xiretza
/
aoc2020
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

day14/haskell: replace map-filter-enumerate with findIndices

This commit is contained in:
Xiretza 2020-12-16 17:55:22 +01:00
parent 5cbd457ebc
commit d99efc09fe
Signed by: xiretza
GPG Key ID: 17B78226F7139993
1 changed files with 2 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
day14/day14.hs
View File

@ -5,6 +5,7 @@ module Day14 where
import AoC
import Data.Bits
import Data.List
import Data.Map (Map)
import qualified Data.Map as M
import Data.Maybe
@ -26,7 +27,7 @@ parseMaskDecl :: ReadP Mask
parseMaskDecl = do
string "mask = "
mask <- many1 (choice $ char <$> "01X")
let extractMask c = foldl setBit zeroBits . map fst . filter ((==c) . snd) . enumerate 0 . reverse $ mask
let extractMask c = foldl setBit zeroBits . findIndices (==c) . reverse $ mask
return $ Mask { set = extractMask '1'
, clear = extractMask '0'
, dontcare = extractMask 'X'