'in' syntax for searching arrays

[Bill Baxter]

Denton Cockburn wrote:
> What would be the problem in extending the 'in' syntax used for AA to
> regular arrays?
> 
> I think it's rather nice syntactic sugar.

What it should mean.  See the series of arguments and counter-arguments 
in the enh request I filed:
http://d.puremagic.com/issues/show_bug.cgi?id=1323

So which meaning where you hoping it would have?

--bb