2016 Update

Task/Sum-digits-of-an-integer/JavaScript/sum-digits-of-an-integer-1.js

@@ -0,0 +1,6 @@
+function sumDigits(n) {
+	n += ''
+	for (var s=0, i=0, e=n.length; i<e; i+=1) s+=parseInt(n.charAt(i),36)
+	return s
+}
+for (var n of [1, 12345, 0xfe, 'fe', 'f0e', '999ABCXYZ']) document.write(n, ' sum to ', sumDigits(n), '<br>')

Task/Sum-digits-of-an-integer/JavaScript/sum-digits-of-an-integer-2.js

@@ -0,0 +1,27 @@
+(function () {
+    'use strict';
+
+    // digitsSummed :: (Int | String) -> Int
+    function digitsSummed(number) {
+
+        // 10 digits + 26 alphabetics
+        // give us glyphs for up to base 36
+        var intMaxBase = 36;
+
+        return number
+            .toString()
+            .split('')
+            .reduce(function (a, digit) {
+                return a + parseInt(digit, intMaxBase);
+            }, 0);
+    }
+
+    // TEST
+
+    return [1, 12345, 0xfe, 'fe', 'f0e', '999ABCXYZ']
+        .map(function (x) {
+            return x + ' -> ' + digitsSummed(x);
+        })
+        .join('\n');
+
+})();