Higher Order Messaging backgrounded

Piers Cawley talks about RSpec's use of HOM:

It is, however, encouraging to see initiatives like Rspec which, through judicious use of higher order messages enables a much more fluent environment for writing tests:

I think that's the first time I've seen HOM used to explain something else, rather than being the object of attention itself. So HOM is starting to be seen as simply a part of the computing landscape, at least by some. Cool. HOM was never conceived of as an interesting thing by itself but rather as a (meta-)building block for building more expressive computational forms. RSpec looks exactly like one of those cool things HOM enables that I would never have come up with myself. I look forward to seeing more.