oop_code.rb

class Transaction

  attr_reader :name, :description, :amount, :purchase_date

  def initialize(name, description, amount, purchase_date)
    @name = name
    @description = description
    @amount = amount
    @purchase_date = purchase_date
  end
end

class BankAccount

  attr_accessor :transactions, :balance
  attr_reader :owner, :account_number

  def initialize(owner, balance)
    @owner = owner
    @balance = Float(balance)
    @account_number = rand(10**9..10**10)
    @transactions = []
  end

  def add_transaction(some_transaction)
    @transactions << some_transaction
  end

  def current_balance
    # @transactions.inject(@balance) { |sum, transaction| sum + transaction.amount }
    @transactions.each { |transaction| @balance += transaction.amount }
    @balance
  end

  def transaction_count
    @transactions.count
  end

  def avg_transaction_amount
    total = @transactions.inject(0) { |sum, transaction| sum + transaction.amount }
    total / @transactions.count
  end

  def largest_purchase

  end
end