[Haskell-cafe] Processing of large files
Alexander N. Kogan
alexander at kogan.nnov.ru
Mon Nov 1 12:52:42 EST 2004
I'm newbie and I don't understand how to process large files in haskell with
constant memory requirements. For example, to count numbers of different
words in text file I wrote following program:
merge  x = [(x,1)]
merge (e@(a,b):xs) x | x == a = (a,b+1):xs
| otherwise = e : merge xs x
foldl merge  .
main = do
args <- getArgs
readFile (head args) >>= procFile
How should I modify it to make it useful on large file?
It eats too much memory...
Auto Wave Processes Group
Institute of Applied Physics RAS
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