good_ssq_red:: IO [Int] good_ssq_red =do { samp <- fmap str2Ints $ readFile "ssqHitNum.txt"; return $ statis samp; } It works now ! thank you
Bulat Ziganshin-2 wrote: > > Hello zaxis, > > Friday, October 23, 2009, 11:15:01 AM, you wrote: > >> good_ssq_red = withFile "ssqHitNum.txt" ReadMode (\h -> do { >> samp <- fmap str2Ints $ hGetContents h; >> print samp; --without this line, the result will always >> [1..16] >> return $ statis samp; >> }) > > withFile and hGetContents shouldn't be used together. both closes file > handle and, here, withFile closes it before hGetContents lazily reads > data. it's why you need to force reading with print > > use readFile instead > > > > -- > Best regards, > Bulat mailto:bulat.zigans...@gmail.com > > _______________________________________________ > Haskell-Cafe mailing list > Haskell-Cafe@haskell.org > http://www.haskell.org/mailman/listinfo/haskell-cafe > > -- View this message in context: http://www.nabble.com/Lazy-problem---tp26021845p26022301.html Sent from the Haskell - Haskell-Cafe mailing list archive at Nabble.com. _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe