From 14d57f70bbd4085466b57dbb062fc965f526b664 Mon Sep 17 00:00:00 2001
From: rolux <rolux@rolux.org>
Date: Wed, 20 Jun 2012 11:57:22 +0200
Subject: [PATCH] add Ox.formatRoman

---
 source/Ox/js/Format.js | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/source/Ox/js/Format.js b/source/Ox/js/Format.js
index 2daa6cff..9294e8f7 100644
--- a/source/Ox/js/Format.js
+++ b/source/Ox/js/Format.js
@@ -631,6 +631,31 @@ Ox.formatPercent = function(number, total, decimals) {
     return Ox.formatNumber(number / total * 100, decimals) + '%'
 };
 
+/*@
+Ox.formatRoman <f> Formats a number as a roman numeral
+    > Ox.formatRoman(1999)
+    'MCMXCIX'
+    > Ox.formatRoman(2001)
+    'MMI'
+    > Ox.formatRoman(0)
+    ''
+    > Ox.formatRoman(10000)
+    'MMMMMMMMMM'
+@*/
+Ox.formatRoman = function(number) {
+    var string = '';
+    Ox.forEach({
+        M: 1000, CM: 900, D: 500, CD: 400, C: 100, XC: 90,
+        L: 50, XL: 40, X: 10, IX: 9, V: 5, IV: 4, I: 1
+    }, function(value, roman) {
+        while (number >= value) {
+            string += roman;
+            number -= value;
+        }
+    });
+    return string;
+};
+
 /*@ 
 Ox.formatString <f> Basic string formatting
     > Ox.formatString('{0}{1}', ['foo', 'bar'])