Re: [Haskell-cafe] Class and Instance

On Fri, 10 Jun 2011 17:28:22 +0100, Patrick Browne wrote:

-- Not OK -- insert 2 [9,2]

This causes an error, because numeric literals like 2 are polymorphic:

:t 2 2 :: Num a => a

If you fix the type to Integer, it works as expected: insert (2 :: Integer) [9,2] By the way: It's helpful to include the error messages in your mail when some piece of code doesn't compile. Cheers, Daniel