roman_numerals.rb

@values = [
  [1000, 'M'],
  [500, 'D'],
  [100, 'C'],
  [50, 'L'],
  [10, 'X'],
  [5, 'V'],
  [1, 'I']
]

def to_roman(num) # RB: Inital Num
  roman_string = ""
  # RB: remainder_num = initial_num
  # RB: When looping through data, make note of what you need to keep track of and what you need to change 
  @values.each do |numeral_pair| 
    # puts num
    # RB: divisor instead of division
    division = num / numeral_pair[0] # 6/5=1. 6/1=6 --> 1/1=1
    # RB: divsion will be an integer
    if division > 0 #V IIIIII # RB: Is the num divisble by the numeral_pair[0] 
      roman_string = roman_string + numeral_pair[1] * division # RB: roman_string += numeral_pair[1] * divisor
      # RB: Remainder of the Initial Num (what's left to convert to roman numerals)
      num = num - numeral_pair[0] # RB: remainder_num -= numeral_pair[0]. 
      # RB: Also look into the modulus operator. where 6%5 = 1
    end
  end
  return roman_string
end

# Drive code... this should print out trues.

puts to_roman(1) == "I"
puts to_roman(3) == "III"
puts to_roman(6) == "VI"
puts to_roman(105) == "CV" 
# TODO: what other cases could you add to ensure your to_roman method is working?