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Ruby Ruby Objects and Classes Build a Bank Account Class Printing The BankAccount

Dax Allen
Dax Allen
4,788 Points
Posted by Dax Allen
Dax Allen
4,788 Points

Bank Account challenge problem.

Implement a to_s method on the BankAccount class that displays the name and balance in the following format (without brackets): Name: [name], Balance: [balance] It is not necessary to use the sprintf method to implement the balance printing.

I keep getting the error: The 'to_s' method did not return a correctly formatted string.

I have no idea what I am doing wrong. Any help is appreciated.

bank_account.rb 
class BankAccount
  attr_reader :name

  def initialize(name)
    @name = name
    @transactions = []
    add_transaction("Beginning Balance", 0)
  end

  def balance
    balance = 0
    @transactions.each do |transaction|
      balance += transaction[:amount]
    end
    balance
  end

  def debit(description, amount)
    add_transaction(description, -amount)
  end

  def credit(description, amount)
    add_transaction(description, amount)
  end

  def add_transaction(description, amount)
    @transactions.push(description: description, amount: amount)
  end

  def to_s
    puts "Name: #{name}, Balance: #{balance}"
  end
end

3 Answers

Joshua Shroy
Joshua Shroy
9,943 Points

Hey Dax,

Instead of puts which displays the string , try return - which returns the value. 

def to_s
  return "Name: #{name}, Balance: #{balance}"
end
Dax Allen
Dax Allen
4,788 Points
Dax Allen
Dax Allen
4,788 Points

That worked. Thank you for your help.

Joshua Shroy
Joshua Shroy
9,943 Points

No problem!

Tomasz Necek
PLUS
Tomasz Necek
Courses Plus Student 7,028 Points
Tomasz Necek
Tomasz Necek
Courses Plus Student 7,028 Points

Why this one is wrong ? "The to_s method did not return a correctly formatted string."

def to_s
    puts "Name: #{@name}, " + "Balance: " + sprintf("%0.2f", balance)
  end

??:)

Nate Heinold
Nate Heinold
2,679 Points
Nate Heinold
Nate Heinold
2,679 Points

I was interested in this as well. Thinking is that, unlike the training video, our code challenge does not have the trailing calls on the class:

...
puts "Register:"
bank_account.print_register

So to display "Name: #{name}, Balance: #{balance}" by simply running the Class (as the code challenge exists), you need to use return instead of puts .

Anterrio Howard
Anterrio Howard
2,625 Points
Anterrio Howard
Anterrio Howard
2,625 Points

Here is what it should be.

class BankAccount attr_reader :name

def initialize(name) @name = name @transactions = [] add_transaction("Beginning Balance", 0) end

def balance balance = 0 @transactions.each do |transaction| balance += transaction[:amount] end balance end

def debit(description, amount) add_transaction(description, -amount) end

def credit(description, amount) add_transaction(description, amount) end

def add_transaction(description, amount) @transactions.push(description: description, amount: amount) end

def to_s return "Name: #{name}, Balance: #{balance}" end end