[ruby-talk:04282] Re: [[:alnum:]] etc

Conrad Schneiker <[e-mail]> writes:

> Hi,
> 
> Dave Thomas wrote:
> 
> > A quick question following a recent post on ruby-list: should we be
> > documenting the Posix character classes such as [[:alnum:]] in the
> > book?
> 
> IMHO, Yes! The more often you have to go scrounging for information
> elsewhere, the less useful a reference is, and the less likely a given
> feature will be used, thereby lowering the effective capability/utility
> of a language. Of course there are cost-benefit and declining ROI and
> TTM opportunity cost factors to consider, but unless more than (say)
> about 10 micro-acres of text is involved, I think it's probably
> worthwhile doing.

I'm just wondering if there's a good reason _why_ they're not
documented (perhaps they don't work on SJIS text or some such).

Dave