The language is now at 1.9.3, and while things are fundamentally the same there are assorted little differences.
Still, as a free intro to the language it's not bad.
If you want to buy a book I'd suggest The Ruby Programming Language, as well as anything by Gregory Brown or David A. Black.
Greg also produces the Practicing Ruby newsletter which I cannot recommend highly enough.
http://practicingruby.com/
Greg does amazing stuff.
See also http://university.rubymendicant.com and http://blog.rubybestpractices.com
The language is now at 1.9.3, and while things are fundamentally the same there are assorted little differences.
Still, as a free intro to the language it's not bad.
If you want to buy a book I'd suggest The Ruby Programming Language, as well as anything by Gregory Brown or David A. Black.
Greg also produces the Practicing Ruby newsletter which I cannot recommend highly enough.
http://practicingruby.com/
Greg does amazing stuff.
See also http://university.rubymendicant.com and http://blog.rubybestpractices.com