Drew: I was born in Urumqi (and I'm in Beijing now).  It takes only 33 hours from Beijing to Urumqi now.  I don't know where you are, but I'd like to . . .
`(function (lambda (...) (...)))' is used in many places in Emacs, like shell.el, webjump.el, files.el and so on.  What's the difference between . . .
bit manipulation