On Feb 24, 4:43 pm, Gary Wright <gwtm... / mac.com> wrote:

> Facets defines Hash#- based on [key,value] pairs and not keys.  An
> argument can be made for either approach but you can't integrate code
> bases that have different expectations for Hash#-.

BTW, there is a reason for that. You can do:

  ahash - otherhash.keys

T.