Re: [Haskell-cafe] What's the problem with iota's type signature?

On Wed, May 27, 2009 at 7:33 PM, michael rice wrote:

Still exploring monads. I don't understand why the type signature for double is OK, but not the one for iota.

Michael

=================

--double :: (Int a) => a -> Maybe b --double x = Just (x + x)

iota :: (Int a) => a -> [b] iota n = [1..n]

Int is not a class, and you are using it as such?

--usage: [3,4,5] >>= iota --should produce [1,2,3,1,2,3,4,1,2,3,4,5]

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