Re: [Caml-list] List.sort

[Alessandro Baretta <alex@baretta.com>]

Johann Spies wrote:
> 
> According to the manual the Persvasives.compare function is suitable
> to use with List.sort.  I can't figure out how to use it:
> ----------------------------
> # k;;
> - : int list = [3; 2; 1]
> # List.sort (compare 1 2) k;;
> This expression has type int but is here used with type 'a -> 'a ->
> int  ...

         Objective Caml version 3.04+13 (2002-06-05)

# let k = [ 3; 2 ; 1];;
val k : int list = [3; 2; 1]
# List.sort compare k;;
- : int list = [1; 2; 3]


Does this solve your problem? You have to realize that 
functions (like Pervasives.compare) are first class citizens 
in O'Caml. That is, you can pass a function like List.sort 
*another function* as a actual parameter.

This is a fairly elementary question. You should try to 
avoid posting questions like this on this list; however, I 
am more than willing to lend a hand, insofar as possible, so 
you can write to me personally, but please mention "Caml" in 
the subject.

Alex


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