On Nov 6, 5:04   򮮮 
> I was looking for documentation for the block variants of Array#index
> and/or Array#find_index methods athttp://www.ruby-doc.org/core/classes/Array.html
> but could not find anything (I do see the object variant of
> Array#index). Are they documented elsewhere ?

The 1.9 docs seem to have them:
http://ruby-doc.org/ruby-1.9/index.html
specifically:
http://ruby-doc.org/ruby-1.9/classes/Array.html#M000712