Hi Dan,
Thanks for the tip. \B does seem to work in the way that I expected the
null pattern to (although I understand the subtle difference you point
out. Fortunately, our usernames shouldn't have any word boundaries in
them.)
The other issue that I am running into is that it seems that slists
cannot be indexed - calling getindices on an slist does not seem to
return another slist. So only arrays have indices (?)
I attempted:
vars:
"chars" slist => splitstring("word", "\B", 4);
reports:
cfengine_3::
"The first letter in word is $(chars[0])"
But that doesn't seem to work. So, per your suggestion, I tried
regextract - according to the online docs, regextract will create an
array, which I may be able to use in this way. Problem is...
> # cf-agent -f ./understanding_slist.cf -I -K
> cf3:./understanding_slist.cf:24,83: Unknown built-in function
> regextract(), near token ')'
Is regextract() only available after 3.0.3?
Jim
On 2/26/10 2:13 PM, daniel.kl...@cfengine.com wrote:
> Jim-
>
> You're right, splitstring does not split on every character (and maybe it
> should if you specify a null pattern). And you missed on "." (because that
> makes every character a separator, and then there are no characters to
> separate) and on "[.]" (because a '.' in a [character class] is just a dot,
> and there are no dots in your string. But here's something that will get
> you closer:
>
> vars:
> "chars" slist => splitstring("word", "\B", 4);
>
> (look in the Perl manual for the reason :-) This works fine if you only have
> alphanumeric characters in your string (a-zA-Z0-9_). However, it will NOT
> work
> right if you try to split "foo:baz:bar".
>
> Look at regextract, too - that may be another way of accomplishing what you
> want - in case you need to address more complicated strings to split.
>
> -Dan
>
> P.S. \b means the place between a \w and a \W character. \B means the place
> between two \w or two \W characters.
>
>
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