On Thu, May 8, 2008 at 7:26 PM, Joel VanderWerf <vjoel@[...].edu>  wrote:
>  Todd Benson wrote:
> >
> > I'm drawing a blank here with this one.  Why doesn't this work then...
> >
> > irb(main):006:0> r = /\A[oh]*\z/
> > => /\A[oh]*\z/
> > irb(main):007:0> s = "hello, there"
> > => "hello, there"
> > irb(main):008:0> r === s
> > => false
> 
>  Maybe I'm confused about was wanted originally. The above tests the
>  following condition:
> 
>   (set of chars occurring in given string)
>      is_a_subset_of
>   (given set of chars).

Yep.  The subject title is misleading, because the AND is already
there [^ho] means not h _and_ also not o.

I was looking to find if given a string A, can I say whether or not
all of the characters in string A exist in string B (count doesn't
matter, just existence).  All of you gave me some good answers that I
hadn't thought of.  Good brain food :-)

Todd