Configuration

[Andy Poulsen]

Originally Posted by Wolfgang

Yes.. it's so nice to type

(nth 7 your-list)

I personally prefer (car ..), (cadr..) and when I need more using (nth ...).

Keep in mind (as Wolfgang showed, referring to your "eighth") that when using (nth ...) that the count starts with 0!

In other words, (first mylist) is the same as (nth 0 mylist)...

This one often causes problems for people the first time they try it, so hopefully this will help!

[jkramer]

Hi,

haha, yes, difficult word... nth or car is better, indeed.
But actually, John answered my question in his example code:

(display (getf (sd-inq-configuration-props obj) :name))

That's what I was looking for :-)
Regards,
Jaap

[Wolfgang]

Originally Posted by jkramer

John answered my question in his example code:

(display (getf (sd-inq-configuration-props obj) :name))

Oh :-o .. a PROPERTY list.. I did not look carefully enough. My eyes were catched by the eihght.

When you have a property list, meaning list of key-value-pairs like

(list :key-x value-x  :key-z value-z   :key-y value-y  ..... )

you definitely should access it with getf / setf using the keys to reference the values.

Otherwise you would not use the advantage to of the props list. E.g. with (nth .. ) (eighth...) or whatever you would depend on the order within the list. But the sequence within a property list is and must and will not be guaranteed!

[jkramer]

Yes, I knew I should use a key value, but could'nt find an example...
Thnx,
Jaap