Re: How to iterate over properties in a plist?

[Pascal J. Bourguignon]

Marcin Borkowski <mbork@mbork.pl> writes:

> Hi all,
>
> I need to iterate over all properties in a plist.  Obviously, mapcar (or
> mapc, since I need side effects only) is of no use for me.  I can easily
> write a plist-mapc function:
>
> (defun plist-mapc (function plist)
>   "Iterate FUNCTION (a two-argument function) over PLIST.  Error
> checking is for weenies."
>   (when plist
>     (funcall function (car plist) (cadr plist))
>     (plist-mapc function (cddr plist))))
>
> but maybe it's there already?

There's:

    (loop for (k v) on p-list by (function cddr)
          do (something-with :key k :value v))

But you might still want to abstrat it away in a map-plist function.

-- 
__Pascal Bourguignon__                 http://www.informatimago.com/
“The factory of the future will have only two employees, a man and a
dog. The man will be there to feed the dog. The dog will be there to
keep the man from touching the equipment.” -- Carl Bass CEO Autodesk