[Haskell-cafe] Re: data structures question
haskell at list.mightyreason.com
Wed Aug 30 15:49:05 EDT 2006
Benjamin Franksen wrote:
> Matthias Fischmann wrote:
>> The trick is that Int is not the only index data type, but tuples of
>> index data types are, too. Do this:
>> | type Point = (State, State, Int)
>> | type TypeV = Array State Double
>> | matrix :: TypeV
>> | matrix = array bounds values
>> | where
>> | ...
> Surely you meant to say
> | type TypeV = Array Point Double
type Value = Double
newtype PointNat = PointNat Int deriving (...Ix)
type Point = (State,State,PointNat)
type TypeVof a = Array PointNat a
type TypeV = TypeVof Value
I did not even run the code I wrote through ghci, I was just showing what it
could look like.
And stop calling me Shirley.
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