Object Privacy

object_privacy.rb

class BankAccount
  def initialize(customer_name, type, acct_number)
    @customer_name = customer_name
    @type = type
    @acct_number = acct_number
  end

  def customer_name=(customer_name)
    @customer_name = customer_name
  end

  def customer_name
    @customer_name
  end

  def type=(type)
    @type = type
  end

  def type
    @type
  end

  def acct_number
    @acct_number.sub(/\d{3}-\d{2}-/, "XXX-XX-#{$3}")
  end

  def to_s
    "#{@customer_name}: #{@type} # #{acct_number}"
  end
end