Re: Effective use of destructive functions

["achambers.home@googlemail.com" <achambers.home@googlemail.com>]

On 12 Apr, 08:31, Pascal Bourguignon <p...@informatimago.com> wrote:

> (let ((result (make-list 10 0)))
>    (print (map-into result (function +) '(1 2 3 4 5 6)
>                                         '(100 200 300 400 500 600 700 800)))
>    (print (map-into result (function *) result '(2 2 2 3 3 3)))
>    (map-into result (lambda (x) (+ 1000 x)) result))
>
> (101 202 303 404 505 606 0 0 0 0)
>
> (202 404 606 1212 1515 1818 0 0 0 0)
> (1202 1404 1606 2212 2515 2818 1000 1000 1000 1000)

I'm starting to think that it might be easier to keep a handle on the
root widget then transform that back into the xml tree whenever you
need to actually write it out to a file.  That seems like the more
functional
way to do it.

Cheers,
Andy