class Tes
  attr_reader :allSkills

  def initialize
    @allSkills = {"var" => "p_dodge"}
  end

  def addBuff(buff)
    if buff["var"][0,2] == "p_" then
      buff["var"] = buff["var"].delete "p_"
    end
  end

  def prefire
    c = @allSkills.clone
    addBuff(c)
  end

end

f = Tes.new
f.prefire
puts f.allSkills.inspect