tasks a-s

Task/Roman-numerals-Decode/JavaScript/roman-numerals-decode.js

@@ -0,0 +1,27 @@
+var Roman = {
+  Values: [['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]],
+
+  parse: function(str) {
+    var result = 0
+    for (var i=0; i<Roman.Values.length; ++i) {
+      var pair = Roman.Values[i]
+      var key = pair[0]
+      var value = pair[1]
+      var regex = RegExp('^' + key)
+      while (str.match(regex)) {
+        result += value
+        str = str.replace(regex, '')
+      }
+    }
+    return result
+  }
+}
+
+var test_data = ['MCMXC', 'MDCLXVI', 'MMVIII']
+for (var i=0; i<test_data.length; ++i) {
+  var test_datum = test_data[i]
+  print(test_datum + ": " + Roman.parse(test_datum))
+}