integer_expansion

Creates additional methods for the Integer class in Ruby.

gem install integer_expansion

• Integer#to_roman
• Returns any integer (up to 3999) in Roman numerals.
• 1999.to_roman == 'MCMXCIX'
• Integer#to_old_roman
• Returns any integer (up to 3999) in old style Roman numerals (VIIII as opposed to IV in new Roman).
• 1999.to_old_roman == 'MDCCCCLXXXXVIIII'
• Integer#fact
• Returns any integer factorial.
• 4.fact == 24
• Integer#to_english
• Returns an integer as an english number.
• See working sample here: http://evening-scrubland-1979.herokuapp.com/english_number
• Works up to trillions.
• 1999.to_english == 'one thousand nine hundred ninety nine'
• Integer#add_commas
• Returns an integer as a string with commas.
• 1999.add_commas == '1,999'
• test.rb
• Quick test that returns an array of true/false responses based on methods.
• Error checking for incorrect inputs.

• Additional ArgumentErrors for bad inputs.

• http://rubygems.org/gems/integer_expansion
• https://github.com/TGOlson/class_integer