Data commit

Task/Roman-numerals-Encode/Ruby/roman-numerals-encode-1.rb

@@ -0,0 +1,14 @@
+Symbols = { 1=>'I', 5=>'V', 10=>'X', 50=>'L', 100=>'C', 500=>'D', 1000=>'M' }
+Subtractors = [ [1000, 100], [500, 100], [100, 10], [50, 10], [10, 1], [5, 1], [1, 0] ]
+
+def roman(num)
+  return Symbols[num]  if Symbols.has_key?(num)
+  Subtractors.each do |cutPoint, subtractor|
+    return roman(cutPoint) + roman(num - cutPoint)      if num >  cutPoint
+    return roman(subtractor) + roman(num + subtractor)  if num >= cutPoint - subtractor and num < cutPoint
+  end
+end
+
+[1990, 2008, 1666].each do |i|
+  puts "%4d => %s" % [i, roman(i)]
+end

Task/Roman-numerals-Encode/Ruby/roman-numerals-encode-2.rb

@@ -0,0 +1,6 @@
+Symbols = [ [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'] ]
+
+def arabic_to_roman(arabic)
+  return '' if arabic.zero?
+  Symbols.each { |arabic_rep, roman_rep| return roman_rep + arabic_to_roman(arabic - arabic_rep) if arabic >= arabic_rep }
+end

Task/Roman-numerals-Encode/Ruby/roman-numerals-encode-3.rb

@@ -0,0 +1,8 @@
+Symbols = [ [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'] ]
+
+def to_roman(num)
+    Symbols.reduce "" do |memo, (divisor, letter)|
+        div, num = num.divmod(divisor)
+        memo + letter * div
+    end
+end