Izmjenjena struktura, dodan backand

web/node_modules/array-reduce/index.js

@@ -0,0 +1,18 @@
+var hasOwn = Object.prototype.hasOwnProperty;
+
+module.exports = function (xs, f, acc) {
+    var hasAcc = arguments.length >= 3;
+    if (hasAcc && xs.reduce) return xs.reduce(f, acc);
+    if (xs.reduce) return xs.reduce(f);
+    
+    for (var i = 0; i < xs.length; i++) {
+        if (!hasOwn.call(xs, i)) continue;
+        if (!hasAcc) {
+            acc = xs[i];
+            hasAcc = true;
+            continue;
+        }
+        acc = f(acc, xs[i], i);
+    }
+    return acc;
+};