Neil is correct, of course, but if you start thinking in those terms, then you're still thinking like Cfengine is a programming language, and not a declarative language. Why do you need a particular element of a list? The idea behind lists is that you address all of the elements, either serially (with no break or next or continue or last statements) or as a whole. You can get all of the indices if you want - but you can't select which you want. As soon as you have that kind of decision mechanism, you introduce (the possibility, at least) of non-convergent promises.
-Dan On Sep 5, 2011, at 12:49 AM, no-re...@cfengine.com wrote: > Forum: CFEngine Help > Subject: Re: Access single list element > Author: sauer > Link to topic: https://cfengine.com/forum/read.php?3,23314,23351#msg-23351 > > neilhwatson Wrote: > ------------------------------------------------------- >> Is there a way to access a given element within a >> list? In Perl one might call >> $list[0] to get the first element. I tried a few >> variations of that in CF but >> nothing seemed to work. I thought there was a >> thread about this some time ago >> but, I can seem to find it. > > That'd be an array then, not a list. ;) I'd probably solve the problem by > doing something like > "listtoarray[$(list)]" string => "$(list)" > and then referencing elements from listtoarray. And then I'd be compelled to > say twelve Hail Marys afterwards to make up for copying the whole list to an > array just to get to a single element which was already basically in an > array. :) > > There's probably something you could do with a combination of join, split, > and grep as well if you feel more adventurous. > > _______________________________________________ > Help-cfengine mailing list > Help-cfengine@cfengine.org > https://cfengine.org/mailman/listinfo/help-cfengine _______________________________________________ Help-cfengine mailing list Help-cfengine@cfengine.org https://cfengine.org/mailman/listinfo/help-cfengine
