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

Max Rabkin ha scritto:

[...]

Then we can define (/.) :: (Real a1, Real a2, Fractional a) => a1 -> a2 -> a x /. y = fromRational $ toRational x / toRational y [...]

(//) :: (Integral b, Real a, Real a1) => a -> a1 -> b x // y = floor $ toRational x / toRational y

Hope that helps, Max

Yes, thanks. However there is still a *big* problem: it is inefficient. Here is a Python version of the Chudnovsky algorithm [1] for computing Pi: http://paste.pocoo.org/show/102800/ On my system it takes 10 seconds. Here is an Haskell version: http://paste.pocoo.org/show/102801/ On my system it takes 30 seconds. Thanks Manlio Perillo [1] http://upload.wikimedia.org/math/6/6/8/6681cd21f3ca9bf13248a87d4202e06a.png