Word frequency: Difference between revisions
Content added Content deleted
(simplify) |
m (→{{header|Haskell}}: workaround failing syntax highlighting (doesn't seem to know that ' is a symbol character)) |
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import Control.Category -- (>>>) |
import Control.Category -- (>>>) |
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import Data.Char -- toLower, isSpace |
import Data.Char -- toLower, isSpace |
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import Data.List -- sortBy, (Foldable(foldl')), filter |
import Data.List -- sortBy, (Foldable(foldl')), filter -- ' |
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import Data.Ord -- Down |
import Data.Ord -- Down |
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import System.IO -- stdin, ReadMode, openFile, hClose |
import System.IO -- stdin, ReadMode, openFile, hClose |
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frequencies :: Ord a => [a] -> Map a Integer |
frequencies :: Ord a => [a] -> Map a Integer |
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frequencies = foldl' (\m k -> M.insertWith (+) k 1 m) M.empty |
frequencies = foldl' (\m k -> M.insertWith (+) k 1 m) M.empty -- ' |
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{-# SPECIALIZE frequencies :: [Text] -> Map Text Integer #-} |
{-# SPECIALIZE frequencies :: [Text] -> Map Text Integer #-} |
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import System.IO (stdin, IOMode(..), openFile, hClose) |
import System.IO (stdin, IOMode(..), openFile, hClose) |
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import System.Environment (getArgs) |
import System.Environment (getArgs) |
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import Data.IORef (IORef(..), newIORef, readIORef, modifyIORef') |
import Data.IORef (IORef(..), newIORef, readIORef, modifyIORef') -- ' |
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-- containers |
-- containers |
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where |
where |
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alter Nothing = Just <$> newIORef (1 :: Int) |
alter Nothing = Just <$> newIORef (1 :: Int) |
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alter (Just ref) = modifyIORef' ref (+ 1) >> return (Just ref) |
alter (Just ref) = modifyIORef' ref (+ 1) >> return (Just ref) -- ' |
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main :: IO () |
main :: IO () |
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