Contents

{-# LANGUAGE BangPatterns #-}
module Binary (toDecimal) where
import Control.Monad (foldM)
import Data.Maybe (fromMaybe)

toDecimal :: String -> Int
toDecimal = fromMaybe 0 . foldM go 0
  where
    go !n c = (n * 2 +) `fmap` toDigit c
    toDigit '0' = Just 0
    toDigit '1' = Just 1
    toDigit _   = Nothing

Version data entries

396 entries across 396 versions & 1 rubygems

Version	Path
trackler-2.2.1.180	tracks/haskell/exercises/binary/examples/success-standard/src/Binary.hs
trackler-2.2.1.179	tracks/haskell/exercises/binary/examples/success-standard/src/Binary.hs
trackler-2.2.1.178	tracks/haskell/exercises/binary/examples/success-standard/src/Binary.hs
trackler-2.2.1.177	tracks/haskell/exercises/binary/examples/success-standard/src/Binary.hs
trackler-2.2.1.176	tracks/haskell/exercises/binary/examples/success-standard/src/Binary.hs
trackler-2.2.1.175	tracks/haskell/exercises/binary/examples/success-standard/src/Binary.hs
trackler-2.2.1.174	tracks/haskell/exercises/binary/examples/success-standard/src/Binary.hs
trackler-2.2.1.173	tracks/haskell/exercises/binary/examples/success-standard/src/Binary.hs
trackler-2.2.1.172	tracks/haskell/exercises/binary/examples/success-standard/src/Binary.hs
trackler-2.2.1.171	tracks/haskell/exercises/binary/examples/success-standard/src/Binary.hs
trackler-2.2.1.170	tracks/haskell/exercises/binary/examples/success-standard/src/Binary.hs
trackler-2.2.1.169	tracks/haskell/exercises/binary/examples/success-standard/src/Binary.hs
trackler-2.2.1.167	tracks/haskell/exercises/binary/examples/success-standard/src/Binary.hs
trackler-2.2.1.166	tracks/haskell/exercises/binary/examples/success-standard/src/Binary.hs
trackler-2.2.1.165	tracks/haskell/exercises/binary/examples/success-standard/src/Binary.hs
trackler-2.2.1.164	tracks/haskell/exercises/binary/examples/success-standard/src/Binary.hs
trackler-2.2.1.163	tracks/haskell/exercises/binary/examples/success-standard/src/Binary.hs
trackler-2.2.1.162	tracks/haskell/exercises/binary/examples/success-standard/src/Binary.hs
trackler-2.2.1.161	tracks/haskell/exercises/binary/examples/success-standard/src/Binary.hs
trackler-2.2.1.160	tracks/haskell/exercises/binary/examples/success-standard/src/Binary.hs