edison question

[Hal Daume III]

I'm no edison expert but it seems the problem simply is that you're using
overloaded functions and the compiler can't tell which instance you're
trying to use.  Try adding a type signature to the definition of sorted
(I'm not familiar enough with edision to know what the type is) but
something like:

  let sorted = ... :: SOMETYPEHERE

hopefully someone will provide a more complete answer soon, but since no
one has replied yet...

 - Hal


--
Hal Daume III

 "Computer science is no more about computers    | hdaume@isi.edu
  than astronomy is about telescopes." -Dijkstra | www.isi.edu/~hdaume

On Tue, 30 Jul 2002 paul@theV.net wrote:

> I am quite confused with the collection package provided by
> the edison library. Attached is a sample program, what I
> wanted to do is to maintain a sorted of Pair of id and time
> (sorted by time). The error I got is:
> 
> ghc -package data -package lang test.hs
> 
> test.hs:17:
>     No instance for `Collection.OrdColl c Pair'
>     arising from use of `Collection.minElem' at test.hs:17
>     in a pattern binding: Collection.minElem sorted
> 
> Actually I don't really understand what a class like
> "OrdColl c a" really means and how to use them. Please help!
> 
> Regards,
> .paul.
>