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【小ネタ】Ruby で new するたびにクラスインスタンス変数をインクリメントして、インスタンス変数にぶち込む

Ruby

Last updated at 2022-03-19Posted at 2021-08-14

class BankAccount
  @current_account_number = 0

  def self.new(name)
    super(name, @current_account_number += 1)
  end

  attr_accessor :name
  attr_reader :account_number

  def initialize(name, account_number)
    @account_number = account_number
    @name = name
  end
end

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