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Ruby Ruby Foundations Methods Class Methods

Undefined local variable or method for 'bank_account'. Can't deposit.

I seem to have all the code in my bank_account.rb file just as Jason has in the video, but am getting this error?


Tim Knight
Tim Knight
28,888 Points


Would you mind posting your code here as you have it?

5 Answers

Tim Knight
Tim Knight
28,888 Points

I executed a few calls on the code without any issue:

BankAccount.create_for("Tim", "Knight")
account = BankAccount.find_for("Tim", "Knight")
puts account.full_name   # => Tim Knight
puts account.balance     # => 0
puts account.balance     # => 100
puts account.balance     # => -100
Tim Knight
Tim Knight
28,888 Points

Oh I see. Basically Jason is just creating a local variable of bank_account to pull the details about a specific item. Since the local variable of bank_balance is a class object of BankAccount you then have access to all the methods you wrote in the code.


class BankAccount

def self.create_for(first_name, last_name)
    @accounts ||= []
    @accounts << BankAccount.new(first_name, last_name)

def self.find_for(first_name, last_name)
    @accounts.find{|account| account.full_name == "#{first_name} #{last_name}"}

def initialize(first_name, last_name)
    @balance = 0
    @first_name = first_name
    @last_name = last_name

def full_name
    "#{@first_name} #{@last_name}"

def deposit(amount)
    @balance += amount

def withdraw(amount)
    @balance -= amount

def balance


Tim Knight
Tim Knight
28,888 Points

The code looks okay so far. What are you executing to bring up the error?

I was executing the call Jason did in the course, bank_account.deposit(100).

I think I found the issue. I noticed you called account = BankAccount.find_for("Tim", "Knight")

I didn't do that before trying to deposit. I did it and it worked! Thanks.

Now, do you mind giving me a laymans as to why it worked?