From: Steve Wilhelm <steve@...831.com>
Date: 2009-11-16T16:34:26+09:00
Subject: Re: Roman Numerals (Arrgh!)

Benoit Daloze wrote:
> I didn't miss it at all, it's quite cool, but very not easy to find 
> directly
> and to explain for an homework ...
> 
> But I admit it's quite a nice solution, not that hard to understand.
> 
> 2009/11/11 Gennady Bystritsky <Gennady.Bystritsky@quest.com>

I'm going to assume the assignment has long been completed, so here is 
how I would have written the function. Not as elegant as the inject 
version above, but simpler for someone new to Ruby (like myself) to 
understand.

def roman_numeral(number)
  result, numerals = "", [
    [1000, "M"], [900, "CM"], [500, "D"], [400, "CD"],
    [100,  "C"], [90,  "XC"], [50,  "L"], [40,  "XL"],
    [10,   "X"], [9,   "IX"], [5,   "V"], [4,   "IV"],
    [1,    "I"]
  ]
  numerals.each do |order, roman|
    result << roman * (number / order)
    number %= order
  end
  result
end
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