## mark a section (Learn more)

>> Hash.new { raise } => {} >> h = Hash.new { raise } => {} >> h[:a] = "yay" => "yay" >> h[:a] => "yay" >> h[:b] RuntimeError: from (irb):2 from (irb):5:in `call' from (irb):5:in `default' from (irb):5:in `[]' from (irb):5

This paste will be private.