lib/member.rb


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class Member
  attr_reader :name, :instrument, :age

  def initialize(params = nil)
    if params
      @name = params['name']
      @instrument = params['instrument']
      @age = params['age'].to_i
    else
      @name = ''
      @instrument = ''
      @age = 0
    end
  end

  def to_s
    [name, instrument, age].join(', ')
  end
end