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Ruby Ruby Foundations Ruby Standard Library Observable

Posted by Michael Branch
Michael Branch
6,254 Points

Wrong number of arguments error

Getting error, it looks like it's occuring on line for "AccountObserver.new" saying the wrong number of arguments (1 for 0). Feel like I'm doing the exact same thing as Jason in the video.

Here is code:

require 'observer'

class BankAccount include Observable

def initialize(name)
    @name = name
    @transactions = []
end

def deposit(amount)
    changed
    notify_observers(Time.now, 'deposit', amount)
    @transactions.push(amount)
end

def withdraw(amount)
    changed
    notify_observers(Time.now, 'withdraw', amount)
    @transactions.push(-amount)
end

end

class AccountObserver def initalize(account) @account = account @account.add_observer(self) end

def update(time, kind, amount)
    puts "[#{time} (#{kind})]: #{amount}"
end

end

account = BankAccount.new("Michael") AccountObserver.new(account)

account.deposit(100) account.withdraw(50) account.withdraw(25)