[plt-dev] Re: promoting unstable libraries

On Feb  3, Carl Eastlund wrote:
> On Wed, Feb 3, 2010 at 9:40 PM, Eli Barzilay <eli at barzilay.org> wrote:
> > On Feb  3, Carl Eastlund wrote:
> >> On Wed, Feb 3, 2010 at 9:33 PM, Eli Barzilay <eli at barzilay.org> wrote:
> >> > On Feb  3, Ryan Culpepper wrote:
> >> >> My proposals:
> >> >>
> >> >> -- unstable/list --
> >> >>
> >> >> The following should move:
> >> >>    - list-prefix?
> >> >
> >> > -5 -- a function that removes the shared prefix is something that I'd
> >> > use in several places (actually, I can't think of a case that I needed
> >> > to know if l1 is a prefix of l2 without wanting the tail of l2 too).
> >> > If such a function is added, then adding a `list-prefix?' function
> >> > should be layered on top to maximize profits.
> >> >
> >> >>    - check-duplicate
> >> >
> >> > -5, for the same reason as I originally said -- it is way better
> >> > if this is merged with remove-duplicates, so they can both share
> >> > functionality like keyword arguments, and implementation
> >> > advantages.  (For example, `remove-duplicates' decides whether it
> >> > should use a hash table or the plain list search, but
> >> > `check-duplicates' doesn't and instead forces you to choose and
> >> > has a bad default.  If there are cases where specifying your
> >> > container rather than your equality is needed, then that should be
> >> > added to `remove-duplicates' too.)
> >>
> >> Are you -5ing the functionality, or the implementation?  It seems
> >> like if you have a different implementation in mind, then wherever
> >> they go, we can use that implementation.
> >
> > The implementation.  Like I said:
> >
> > * a `list-prefix?' function should be layered on top
> >
> > * way better if this is merged with remove-duplicates
> 
> That doesn't seem like a reason against having them at all, though.
> That seems like a reason to improve them, to me.

The first is oversimplistic, the second has a different interface for
no good reason.

-- 
          ((lambda (x) (x x)) (lambda (x) (x x)))          Eli Barzilay:
                    http://barzilay.org/                   Maze is Life!