Or good_ssq_red = readFile "ssqHitNum.txt" >>= return . statis . str2Ints I personally prefer this because I like how the >>= illustrates that the result is being fed into "return . statis . str2Ints", but it is a matter of style. :-) Cheers, Greg On Oct 23, 2009, at 1:09 AM, Bulat Ziganshin wrote:
Hello zaxis,
Friday, October 23, 2009, 12:02:57 PM, you wrote:
btw,
good_ssq_red = fmap (statis.str2Ints) $ readFile "ssqHitNum.txt"
or
good_ssq_red = (statis.str2Ints) `fmap` readFile "ssqHitNum.txt"
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.Ziganshin@gmail.com
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-- Best regards, Bulat mailto:Bulat.Ziganshin@gmail.com
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