>> > Doc-ed in the Pickaxe chapter on Expressions. (But not the value 
>> > argument, which is a recently added feature.)
>> 
>> Sigh.
>> 
>> Am I the only one who has a hard time browsing PickAxe?
>> I swear I care almost never find what I want promptly.

You should take a look at:
http://www.ruby-lang.org/en/man-1.4/index.html


						FUKUMOTO Atsushi
						fukumoto / imasy.or.jp