Using array.sort

[torhu]

Heinz wrote:
> What does this sort property do? how can i use it? how do i implement opCmp. thanks in advance

.sort sorts an array, using some default sort order.  If you want to 
change the order, you implement opCmp.


opCmp has got these signatures, think.  It doesn't seem to be documented 
much:

class C {
     // the argument is of type Object, not C
     int opCmp(Object other);
}

or:

struct S {
    int opCmp(S other);
}


opCmp() has to return less than zero if it's own object is smaller, more 
than zero if 'other' is smaller, and zero if they are equal.

You can't define opCmp for any other types, if you want to change the 
sort order of ints, you have to write a separate sort function.