[racket-dev] first and rest in racket/base

I agree with Eli. first is not car and shouldn't be treated as it.

car : (Cons a b) -> a
first : (List a) -> a

I also agree with Carl that we should deprecate grandpa's names and
give nice names. I suggest "fst" and "snd" and "pair"

Jay

On Thu, Dec 13, 2012 at 12:26 PM, Carl Eastlund <cce at ccs.neu.edu> wrote:
> If they do the wrong thing, we should fix them, not deprecate them.  We're
> not LISP, let's not promote car/cdr as the primary names for list
> operations.
>
> Carl Eastlund
>
>
>
> On Thu, Dec 13, 2012 at 2:19 PM, Eli Barzilay <eli at barzilay.org> wrote:
>>
>> -1, since they are different from what some people would expect them
>> to do.  -2 for the `empty', `cons?' etc aliases.
>>
>>
>> An hour and a half ago, Vincent St-Amour wrote:
>> > I just got tripped up, again, trying to traverse a list with `first'
>> > and `rest' in a `racket/base' file. `first' and `rest' are only
>> > available in `racket' and `racket/list', but not in `racket/base'.
>> >
>> > If we want to encourage use of `first' and `rest' over `car' and
>> > `cdr' and of `racket/base' when possible (which, e.g., the style
>> > guide does), I think it makes sense to provide `first' and `rest' in
>> > `racket/base'.
>> >
>> > The attached patch implements that change.
>> >
>> > Does this sound reasonable?
>>
>> --
>>           ((lambda (x) (x x)) (lambda (x) (x x)))          Eli Barzilay:
>>                     http://barzilay.org/                   Maze is Life!
>> _________________________
>>   Racket Developers list:
>>   http://lists.racket-lang.org/dev
>>
>
>
> _________________________
>   Racket Developers list:
>   http://lists.racket-lang.org/dev
>



--
Jay McCarthy <jay at cs.byu.edu>
Assistant Professor / Brigham Young University
http://faculty.cs.byu.edu/~jay

"The glory of God is Intelligence" - D&C 93