Class: Roman

Inherits:
NumeralBase show all
Defined in:
lib/numerify/converters/roman.rb

Overview

A class to convert to Roman numerals.

Constant Summary collapse

NUMERALS = 
{
  0 => "",
  1 => "I",
  5 => "V",
  10 => "X",
  50 => "L",
  100 => "C",
  500 => "D",
  1000 => "M"
}.freeze

Instance Method Summary collapse

Instance Method Details

#convert(arabic_number_string) ⇒ Object 



18
19
20
21
22
23
 
# File 'lib/numerify/converters/roman.rb', line 18

def convert(arabic_number_string)
  arabic_number_string = arabic_number_string.to_s.strip
  return convert_to_roman_below_two_thousand(arabic_number_string) if arabic_number_string.to_i < 2000

  ("M" * arabic_number_string.slice(0...-3).to_i) + convert_to_roman_below_two_thousand(arabic_number_string.slice(-3, 3))
end