Hi. Iam not very deep in ruby. Please answer: 1) is the attr (method) slower than instance_variable_get/set ? 2) How can I define [] for instance_var_get/set (like in struct) ? 3) Is there a way to undefine @variable. I assign nil to them, but in to_yaml output they are still there (even if empty). Is there way to undefine them? Thanks. FP. -- Posted via http://www.ruby-forum.com/.