Cenophobie has created a Ruby Cheatsheet available in PDF and PNG formats. It's a little old (not out of date) but I hadn't seen it before and it's quite good. It only covers the basic, but is a useful reminder of which methods you have at your disposal on the basic classes like Object, String, Array, and Hash. It also includes a list of the special variables, command line arguments, reserved words, expressions, and so forth.
Comments
Benoit ·
I'm addicted to http://www.ruby-doc.org/core/ but I'm gonna give a chance to this sexy cheatsheet :)
Valeriu Palos ·
It's always good to see such cheatsheets for Ruby. Here's a set of 2 (quickrefs) cheatsheets from Ryan Davis; A generic one:
http://ruby-pdf.rubyforge.org/pdf-writer/demos/Ruby-Language-QuickRef.pdf
...and one about Ruby libs:
http://ruby-pdf.rubyforge.org/pdf-writer/demos/Ruby-Library-QuickRef.pdf