ruby should I use self. or @

Question

Here is my ruby code

class Demo
  attr_accessor :lines

  def initialize(lines)
    self.lines = lines
  end
end

In the above code I could have

Answer 1

The main difference would be if you redefined lines= to do something other than @lines = lines.

For example, you could add validation to the attribute (for example, raising if lines is empty).