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Ruby Ruby Foundations Methods Class Methods

Posted by mm4
mm4
8,600 Points

NoMethodError: undefined method 'each' for #<BankAccount:0x007ff7db82fd40>

I have tried debugging for an hour to no avail. 

class BankAccount
    def self.create_for(firstname, lastname)
        @accounts ||= []
        @accounts = BankAccount.new(firstname, lastname)
    end

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

    def initialize(firstname, lastname)
        @balance = 0
        @firstname = firstname
        @lastname = lastname
    end

    def full_name
        "#{@firstname} #{@lastname}"
    end

    def deposit(amount)
        @balance += amount
    end

    def withdraw(amount)
        @balance -= amount
    end
end

And this is my error:

irb(main):045:0> bankaccount = BankAccount.find_for("J","R")
NoMethodError: undefined method `each' for #<BankAccount:0x007ff7db82fd40>
    from /Users/Macbook/hello.rb:13:in `find'
    from /Users/Macbook/hello.rb:13:in `find_for'
    from (irb):45
    from /Users/Macbook/.rbenv/versions/2.1.5/bin/irb:11:in `<main>'

1 Answer

Maciej Czuchnowski
Maciej Czuchnowski
36,440 Points
Maciej Czuchnowski
Maciej Czuchnowski
36,440 Points

Please rewatch the video, especially 2:28 and make sure your code is correct, especially the self.create_for method with << operator.

mm4
mm4
8,600 Points

Actually that's what I've been playing around with. When I originally had that, it said:

irb(main):016:0> BankAccount.create_for("D","S")

NoMethodError: undefined method `<<' for #<BankAccount:0x007fb181868398>

I thought << was supposed to be already defined in Ruby...

Maciej Czuchnowski
Maciej Czuchnowski
36,440 Points
Maciej Czuchnowski
Maciej Czuchnowski
36,440 Points

<< is defined in Ruby, it allows inserting elements into arrays and hashes.

Maciej Czuchnowski
Maciej Czuchnowski
36,440 Points
Maciej Czuchnowski
Maciej Czuchnowski
36,440 Points

I tried your code, it works fine with << operator.

mm4
mm4
8,600 Points

Okay, thanks! That's really odd. Not sure why my terminal is saying such things but I'll look into it...

Maciej Czuchnowski
Maciej Czuchnowski
36,440 Points
Maciej Czuchnowski
Maciej Czuchnowski
36,440 Points

I used your code in the terminal by running `ruby bank.rb (I saved it with that name locally). I did not run it in IRB. But in IRB you would have to load it first, like Jason did, then run BankAccount.create_for("J","R") and then you can use bankaccount = BankAccount.find_for("J","R") command.

mm4
mm4
8,600 Points

Hi Maciej,

I think I just had to quit the terminal and restart it because once I did that, I got it to work. Maybe I had typed something weird and forgotten about it, and that's why it wasn't working properly, but it's good now! Thanks for the help!