Re: can `shuffle-vector' be moved?

[Kevin Rodgers]

On 5/12/11 9:53 PM, Ted Zlatanov wrote:
> On Fri, 13 May 2011 10:03:57 +0800 Leo<address@hidden>  wrote:
>
> L>  On 2011-05-13 03:58 +0800, Ted Zlatanov wrote:
> > > Also this loop call from Pascal Bourguignon is a nice CL alternative to
> > > `shuffle-vector', though it uses the same algorithm:
> > >
> > > (defun shuffle (vector)
> > > "Re-orders randomly the vector."
> > > (loop
> > > for i from (1-  (length vector)) downto 1
> > > do (rotatef (aref vector i) (aref vector (random i)))))
> > >
> > > Can it go into cl-macs.el?
>
> L>  We should have one version and not in cl-macs.el.
>
> Why?  There are many functions in cl-macs.el that have analogues in
> plain ELisp.  If anything I would drop `shuffle-vector' :)
>
> L>  `shuffle' is not in common lisp.
>
> I didn't say it was.  cl-macs.el is not Common Lisp by any means and IMO
> should not be treated as a clone of it.

From cl-macs.el:

;; These are extensions to Emacs Lisp that provide a degree of
;; Common Lisp compatibility, beyond what is already built-in
;; in Emacs Lisp.
...
;; This file contains the portions of the Common Lisp extensions
;; package which should be autoloaded, but need only be present
;; if the compiler or interpreter is used---this file is not
;; necessary for executing compiled code.

--
Kevin Rodgers
Denver, Colorado, USA