On Fri, Mar 28, 2014 at 12:54:03AM -0500, John M. Dlugosz wrote:
> More generally, is there some effective way to search for
> non-alphabetical Haskell things?  Google just ignores the
> "punctuation".

You can find :| on Hayoo [1], the other handy place where to
look for APIs stuff being Hoogle [2] (Hoogle is more focused on
'standard' Haskell libraries, Hayoo searches in all Hackage,
both have their usefulness).
>From there, if I need to search, say, a blog post, I will refer
to the name of the typeclass/module/data and feed it to a search
engine (so in this case "data NonEmpty etc. etc.").
Apparently Google ignores punctuation in most cases [3].