From 792e55ba1a28934060ac8534a3ef61bd8ccd8da4 Mon Sep 17 00:00:00 2001
From: Erwin Boskma <erwin@datarift.nl>
Date: Tue, 24 Feb 2015 22:00:02 +0100
Subject: [PATCH 1/3] Extra methods

---
 lib/team_ferwin.rb | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/lib/team_ferwin.rb b/lib/team_ferwin.rb
index 90ea37d..e355824 100644
--- a/lib/team_ferwin.rb
+++ b/lib/team_ferwin.rb
@@ -51,6 +51,14 @@ def *(other)
       self.to_i * other.to_i
     end
 
+    def %(other)
+      self.to_i * other.to_i
+    end
+
+    def **(other)
+      self.to_i * other.to_i
+    end
+
     private
       def arabic(token)
         ROMAN_NUMERALS[token]

From ba35161111aaa457abcacbced076baa0451793de Mon Sep 17 00:00:00 2001
From: Erwin Boskma <erwin@datarift.nl>
Date: Tue, 24 Feb 2015 22:02:03 +0100
Subject: [PATCH 2/3] Kleine fix

---
 lib/team_ferwin.rb | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/team_ferwin.rb b/lib/team_ferwin.rb
index e355824..528cf26 100644
--- a/lib/team_ferwin.rb
+++ b/lib/team_ferwin.rb
@@ -52,11 +52,11 @@ def *(other)
     end
 
     def %(other)
-      self.to_i * other.to_i
+      self.to_i % other.to_i
     end
 
     def **(other)
-      self.to_i * other.to_i
+      self.to_i ** other.to_i
     end
 
     private

From 80b08100123576044df72d6e9ecb320d995b3cd4 Mon Sep 17 00:00:00 2001
From: Erwin Boskma <erwin@datarift.nl>
Date: Tue, 24 Feb 2015 22:54:01 +0100
Subject: [PATCH 3/3] Now with Roman Numerals

---
 lib/team_ferwin.rb | 51 +++++++++++++++++++++++++---------------------
 1 file changed, 28 insertions(+), 23 deletions(-)

diff --git a/lib/team_ferwin.rb b/lib/team_ferwin.rb
index 528cf26..52b00e8 100644
--- a/lib/team_ferwin.rb
+++ b/lib/team_ferwin.rb
@@ -2,18 +2,25 @@ class TeamFerwin
 
     ROMAN_NUMERALS = {
       "I" => 1,
+      "IV" => 4,
       "V" => 5,
+      "IX" => 9,
       "X" => 10,
+      "XV" => 40,
       "L" => 50,
+      "XC" => 90,
       "C" => 100,
+      "CD" => 400,
       "D" => 500,
+      "CM" => 900,
       "M" => 1000
     }
     # Use this method to convert roman numbers to arabic
     #
     # Don't you dare cheat on spec!!!
-    def initialize(roman)
+    def initialize(roman, mode)
       @roman_numeral_tokens = roman
+      @mode = mode.to_sym
     end
 
     def to_i
@@ -32,35 +39,33 @@ def to_i
     end
 
     def to_roman(num)
+      roman = ""
+      ROMAN_NUMERALS.each_pair.to_a.reverse.each do |token, digit|
+        while num >= digit do
+          roman << token
+          num -= digit
+        end
+      end
 
+      roman
     end
 
-    def +(other)
-      self.to_i + other.to_i
-    end
-
-    def -(other)
-      self.to_i - other.to_i
-    end
-
-    def /(other)
-      self.to_i.to_f / other.to_i.to_f
-    end
-
-    def *(other)
-      self.to_i * other.to_i
-    end
-
-    def %(other)
-      self.to_i % other.to_i
-    end
-
-    def **(other)
-      self.to_i ** other.to_i
+    [:+, :-, :*, :**, :/, :%].each do |op|
+      define_method op do |other|
+        result(self.to_i.send(op, other.to_i))
+      end
     end
 
     private
       def arabic(token)
         ROMAN_NUMERALS[token]
       end
+
+      def result(num)
+        if @mode == :roman
+          self.to_roman(num)
+        else
+          num
+        end
+      end
 end