Hi Antoine, The first Int field is a unique index, beginning at 1 and increasing by 1 for each unique Node. The second [Int] field is just a list of random numbers associated with that node.
Mark On 14/08/2011, at 2:13 AM, Antoine Latter wrote: > On Sat, Aug 13, 2011 at 4:37 AM, Mark Spezzano > <mark.spezz...@chariot.net.au> wrote: >> Hi, >> >> I'm creating a Graph data structure, and I want to use the array list >> approach, implemented as an Array. >> >> I need my Nodes to be instances of Ix for this to work and my Node type is >> roughly as follows: >> >> data Node = MyNode Int [Int] Type1 Type2 >> >> (Type1 and Type2 are nullary algebraic datatypes--enumerations in other >> words) >> >> How can I "index" the Array with an instance of a Node. I think I need to >> make Node an instance of Ix somehow?? >> > > What do the 'Int' and '[Int]' fields represent in your Node type? > > Antoine > >> Is this a sensible approach? Sample code of the instance declaration for Ix >> would be helpful. >> >> >> Thanks >> >> Mark Spezzano >> >> _______________________________________________ >> Haskell-Cafe mailing list >> Haskell-Cafe@haskell.org >> http://www.haskell.org/mailman/listinfo/haskell-cafe >> > > _______________________________________________ > Haskell-Cafe mailing list > Haskell-Cafe@haskell.org > http://www.haskell.org/mailman/listinfo/haskell-cafe > > _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
