Exercise: Class Warfare, Validate a Credit Card Number

gistfile1.rb

class CreditCard

  def initialize(num)
    if num.to_s.length == 16
      @num = num
    else
      raise ArgumentError.new("Invalid number length.")
    end
  end
  
def sum_of_odds
    num_array = Array.new
    num_hash = Hash.new
    odd_array = Array.new
    @num.to_s.each_char {|c| num_array.push(c.to_i)}
    puts num_array.inspect
    num_array.each_index {|i| num_hash[i] = num_array[i]}
    puts num_hash
    num_hash = num_hash.select! {|k,v| k == 0 || k % 2 == 0}
    puts num_hash.inspect
    num_hash.each_pair {|k,v| num_hash[k] = v * 2}
    puts num_hash.inspect
    num_hash.each_pair {|k,v| odd_array.push(num_hash[k])}
    puts odd_array.inspect
    odd_array.each_index { |i|
        odd_array[i].to_s.each_char {|c| odd_array.push(c.to_i) if odd_array[i] > 9}
    }
    puts odd_array.inspect
    odd_array.delete_if {|e| e > 9}
    puts odd_array.inspect
    @odd_sum = odd_array.inject(:+)
  end
  
  def sum_of_evens
    num_array = Array.new
    num_hash = Hash.new
    even_array = Array.new
    @num.to_s.each_char {|c| num_array.push(c.to_i)}
    puts num_array.inspect
    num_array.each_index {|i| num_hash[i] = num_array[i]}
    puts num_hash.inspect
    num_hash = num_hash.select! {|k,v| k != 0 && k % 2 != 0}
    puts num_hash.inspect
    num_hash.each_pair {|k,v| even_array.push(num_hash[k])}
    puts even_array.inspect
    @even_sum = even_array.inject(:+)
  end

  
  def check_card
    (sum_of_odds + sum_of_evens) % 10 == 0 ? true : false
    puts (@even_sum + @odd_sum)
  end
    
end

visa = CreditCard.new(8769345123245673)
visa.check_card