Just another update

Task/Averages-Arithmetic-mean/JavaScript/averages-arithmetic-mean-2.js

@@ -1,4 +1,9 @@
-function mean(a)
-{
- return a.length ? Functional.reduce('+', 0, a) / a.length : 0;
-}
+function mean(array) {
+    var sum = 0;
+    array.forEach(function(value){
+        sum += value;
+        });
+    return array.length ? sum / array.length : 0;
+    }
+
+alert( mean( [1,2,3,4,5] ) );   // 3