Another update from ingydotnet^djgoku

Task/Roman-numerals-Encode/JavaScript/roman-numerals-encode-2.js

@@ -0,0 +1,50 @@
+function roman(strIntegers) {
+  'use strict';
+  // DICTIONARY OF GLYPH:VALUE MAPPINGS
+  var dctGlyphs = {
+    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
+  };
+
+  // LIST OF INTEGER STRINGS, WITH ANY SEPARATOR
+  var strNums = typeof strIntegers === 'string' ? strIntegers : strIntegers.toString(),
+    lstParts = strNums.split(/\d+/),
+    strSeparator = lstParts.length > 1 ? lstParts[1] : '',
+    lstDecimal = strSeparator ? strIntegers.split(strSeparator) : [strNums];
+
+
+  // REWRITE OF DECIMAL INTEGER AS ROMAN
+  function rewrite(strN) {
+    var n = Number(strN);
+
+    /*  Starting with the highest-valued glyph:
+      take as many bites as we can with it
+      (decrementing residual value with each bite,
+      and appending a corresponding glyph copy to the string)
+      before moving down to the next most expensive glyph */
+
+  // return Object.keys(dctGlyphs).reduce(
+  // OR:
+  return 'M CM D CD C XC L XL X IX V IV I'.split(' ').reduce(
+      function (s, k) {
+        var v = dctGlyphs[k];
+        return n >= v ? (n -= v, s + k) : s;
+      }, ''
+    )
+
+  }
+
+  // ALL REWRITTEN, WITH SEPARATOR RESTORED
+  return lstDecimal.map(rewrite).join(strSeparator);
+}

Task/Roman-numerals-Encode/JavaScript/roman-numerals-encode-3.js

@@ -0,0 +1,5 @@
+roman(1999);
+// --> "MCMXCIX"
+
+[1990, 2008, "14.09.2015", 2000, 1666].map(roman);
+// --> ["MCMXC", "MCMCVI", "XIV.IX.MCMCXV", "MCMC", "MDCLXVI"]