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Ruby Build an Address Book in Ruby Class Design Phone Number Class

Michael Hulet
Michael Hulet
47,913 Points
Posted by Michael Hulet
Michael Hulet
47,913 Points

Phone Numbers Print Twice

I've gotten to the part of the video where we write the print_phone_numbers method, and for some reason, all my phone numbers print twice. Here is my version of the aforementioned method:

def print_phone_numbers
    puts "\nPhone Numbers\n" + ("-" * 20)
    phone_numbers.each do |number|
      puts number
    end
end

Here is the output of calling that method (after adding some phone numbers):

Phone Numbers
--------------------
Home: (555)-555-5555
Work: (555)-555-5555
Home: (555)-555-5555
Work: (555)-555-5555

Curiously, if I add another puts statement in the each loop, so the print_phone_numbers method looks like this:

def print_phone_numbers
    puts "\nPhone Numbers\n" + ("-" * 20)
    phone_numbers.each do |number|
      puts "Hi"
      puts number
    end
end

The output looks like this:

Phone Numbers
--------------------
Hi
Home: (555)-555-5555
Hi
Work: (555)-555-5555
Home: (555)-555-5555
Work: (555)-555-5555

Any idea how I could fix this?

EDIT: Here's the contents of both files involved in this program, since it was requested

contact.rb 
require "./phone_number.rb"
class Contact
  attr_writer :first_name, :middle_name, :last_name
  attr_reader :phone_numbers
  def initialize
    @phone_numbers = []
  end
  def first_name
    return @first_name
  end
  def middle_name
    return @middle_name
  end
  def last_name
    return @last_name
  end
  def full_name
    name = first_name
    if !middle_name.nil?
      name += " #{middle_name}"
    end
    return name += " #{last_name}"
  end
  def last_first
    name = last_name + ", " + first_name
    if !middle_name.nil?
      name += " #{middle_name.slice(0, 1)}"
    end
    return name
  end
  def first_last
    return first_name + " " + last_name
  end
  def to_s(format = "full_name")
    case format
    when "full_name"
      return full_name
    when "last_first"
      return last_first
    when "first"
      return first_name
    when "last"
      return last_name
    else
      return first_last
    end
  end
  def add_phone_number(kind, number)
    phone_number = PhoneNumber.new
    phone_number.kind = kind
    phone_number.number = number
    phone_numbers.push phone_number
  end
  def print_phone_numbers
    puts "\nPhone Numbers\n" + ("-" * 20)
    iterations = 0
    phone_numbers.each do |number|
      puts number
      iterations += 1
      puts iterations
    end
  end
end
michael = Contact.new
michael.first_name = "Michael"
michael.last_name = "Hulet"
michael.add_phone_number("Home", "(555)-555-5555")
michael.add_phone_number("Work", "(555)-555-5555")
puts michael.print_phone_numbers
phone_number.rb 
class PhoneNumber
  attr_accessor :kind, :number
  def to_s
    return "#{kind}: #{number}"
  end
end

2 Answers

Owen Tran
Owen Tran
6,822 Points
Owen Tran
Owen Tran
6,822 Points 
def print_phone_numbers
    puts "\nPhone Numbers\n" + ("-" * 20)
    phone_numbers.each do |number|
        puts number  #  <<< remove this
    end
end
Owen Tran
Owen Tran
6,822 Points
Owen Tran
Owen Tran
6,822 Points

or at the bottom

puts michael.print_phone_numbers

remove the puts to just :

michael.print_phone_numbers

The put here means you are putting the return value, then you are putting AGAIN in the method, that's why it's putting twice. Make sense?

Owen Tran
Owen Tran
6,822 Points
Owen Tran
Owen Tran
6,822 Points

So remove one of the puts, doesn't matter which one

Michael Hulet
Michael Hulet
47,913 Points
Michael Hulet
Michael Hulet
47,913 Points

I removed one of the extraneous puts statements, and it fixed my problem. Thanks so much!

Owen Tran
Owen Tran
6,822 Points
Owen Tran
Owen Tran
6,822 Points

You're welcome :)

Owen Tran
Owen Tran
6,822 Points
Owen Tran
Owen Tran
6,822 Points

What is phone_numbers? Can you post the rest of your code? And how are you calling the method?

This works:

phone_numbers = {"Home:" => '(555)-555-5555', "Work:" =>'(555)-555-5555'}

puts "\nPhone Numbers\n" + ("-" * 20)

phone_numbers.each do |key,number|

puts key + number

end

Michael Hulet
Michael Hulet
47,913 Points
Michael Hulet
Michael Hulet
47,913 Points

phone_numbers is an array instance variable of the Contact class. Per your request, I edited my post to include all of my code