From Newsgroup: comp.lang.lisp

--=-=-=
Content-Type: text/plain
Content-Transfer-Encoding: quoted-printable

In trying to understand McCarthy's eval, I have one question left
unresolved. Let me give a code snippet of eval, which is written in
Common Lisp, taken from Paul Graham's draft.

```
(defun eval. (e a)
(cond
...
((eq (caar e) 'label)
(eval. (cons (caddar e) (cdr e))
(cons (list (cadar e) (car e)) a)))
...
))
```

I wonder what practical difference does it make to, instead, write eval
like this:

```
(defun eval. (e a)
(cond
...
((eq (caar e) 'label)
(eval. (cons (caddar e) (cdr e))
(cons (list (cadar e) (caddar e)) a)))
...
))
```

Anyone?

In my opinion, it makes no practical difference, and this correction
avoids unnecessary double processing.

=2D-=20
The pioneers of a warless world are the youth that
refuse military service. ~ Albert Einstein

--=-=-=
Content-Type: application/pgp-signature; name="signature.asc"

-----BEGIN PGP SIGNATURE-----

iQJKBAEBCgA0FiEEOVeKaEm0xBhCsMmYlk/BEMQK1XUFAmgA2dYWHGRhbi5saXN0 QGxpc3BjbHViLmNvbQAKCRCWT8EQxArVdYdcEACSJPFRTyAfhVTSBICOE3F2tvR8 jdKK11ylA46GDIgFUx2BHojapLjKSciLSy/4fMvJCzws8sUDcu3fZmdt/VXGSAoa ToJOJEK0XbfNuPfU9MCTyygNeBJQlCXv5XDkwpRU8w+kRFPgzVod92jqXbYr1Fqy 0wkj9c5Fg4GgswMx/U5ECWxCuJeQS4O3TXBY6Nakq14gXktykc4VyzkSjV7wQ5Rs 3ygrnxZiZRdFifK5v766eNBMaxTNOWE3uw4CVxU0h9Wsk9dOQ+/YINKszCBFdwhS XCJ87vPTosD6hTG84T2fJfrFJZxryxSuKaUFjTvFSCRPd0BHW/L6ZOftn18izMYb cAWFrAQMyDS+vH44+WuyVOfbT2/sftmcq96Qk22M0g3k6/2jXZbVPhK80bD/0MQM 19VgEDuGJm3o8npgruu+HbyoWDpFtsyLgHwe0VM4npxHfs7fIQWelBakYOt8pR+t x2wh6zgjvkg/Tsm1ECLWjKUXSlX5v9xOE07CXui19Yi+/tR2mZJW//8oK1DW9M3y wWrrWEyacHNYET8g0yKdonNqKt54Wzm0CfKxzeglNuDbgBc+VsedNzPlCWmOrjwr koXRece9tOgAF66YOMnCdT0nKecbmuRFE2Xi6rjU497z1sRz6Y/m1f3UERxqKG7r vWOMcfTKWUYkrPH8Bw==
=gmE/
-----END PGP SIGNATURE-----
--=-=-=--
--- Synchronet 3.21d-Linux NewsLink 1.2