Initial data commit

Task/Averages-Root-mean-square/JavaScript/averages-root-mean-square-1.js

@@ -0,0 +1,6 @@
+function root_mean_square(ary) {
+    var sum_of_squares = ary.reduce(function(s,x) {return (s + x*x)}, 0);
+    return Math.sqrt(sum_of_squares / ary.length);
+}
+
+print( root_mean_square([1,2,3,4,5,6,7,8,9,10]) ); // ==> 6.2048368229954285

Task/Averages-Root-mean-square/JavaScript/averages-root-mean-square-2.js

@@ -0,0 +1,18 @@
+(() => {
+    'use strict';
+
+
+    // rootMeanSquare :: [Num] -> Real
+    const rootMeanSquare = xs =>
+       Math.sqrt(
+            xs.reduce(
+                (a, x) => (a + x * x),
+                0
+           ) / xs.length
+        );
+
+
+    return rootMeanSquare([1, 2, 3, 4, 5, 6, 7, 8, 9, 10]);
+
+     // -> 6.2048368229954285
+})();