This is a question about the use of type classes in Haskell.
I get an error (below) when trying to compile the code (below and at
https://github.com/chrisdew/haskell-sandbox/blob/master/not_working_but_clean.hs
).
As someone just learning Haskell, I have tried following GHC's advice,
but I think
@Neil Brown - That did it. It's not the ideal solution, as all -
are 'coerced' into being 'IO x' (if the rightmost term is an 'IO x'.
But it'll do for the time being.
Many thanks,
Chris.
On 14 April 2011 13:50, Neil Brown nc...@kent.ac.uk wrote:
On 14/04/11 13:00, Chris Dew wrote:
class
@Stephen Tetley - The stream class exists simply to allow for the
creation of a - operator which can be used to 'Stream' data through
multiple pure and IO functions, on the way to some form of output.
It's probably not a great idea, as there are more idiomatic solutions
in Haskell - I'm sure
. Using the partial solution
which Neil Brown proposed, the code will work, but (hello -
bracket) will have a type of IO String which *seems* like it will be
less efficient.
All the best,
Chris.
On 14 April 2011 21:22, Stephen Tetley stephen.tet...@gmail.com wrote:
On 14 April 2011 20:35, Chris
Hello, just like everyone else, I have a question about monads. I've
read the tutorials, written one monad myself (not in this email), but
I still consider myself a Haskell beginner.
* Does GHC eliminate unneeded MVars during compilation?
I'm expecting that it doesn't, as that would mean
