Re: [Haskell-cafe] about integer and float operations

Max Rabkin ha scritto:

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Here is an Haskell version: http://paste.pocoo.org/show/102801/

On my system it takes 30 seconds.

You're only dividing integers by integers to get Doubles.

x /. y = fromIntegral x / fromIntegral y

works just fine in this case.

No, this *does not works*. I get Nan as result, since fromIntegral a, when a is out of range of a double, returns Infinity. Prelude> (fromIntegral (fac 777)) :: Double Infinity CPython, does not try to convert to double, but, instead, to a scaled double.

--Max

Manlio Perillo