Array comprehension syntax

[Jason Orendorff]

Erik Arvidsson wrote:
> That should throw a syntax error since it uses 'in' instead of 'of'.

D'oh!

Brendan Eich wrote:
> LOL! You can tell Jason is a Pythonista (or Pythonist?). I guess I am too,
> slightly.
>
> Anyway, we'll figure out how to write 'of' not 'in' when the file name ends
> in .js!

My secret is out.

I see a few lines of Emacs Lisp in my future.  :-|

-j