Merge pull request #364 from fruddenfeldt/dev

New solution to match updated test syntax

08_calculator/solution/calculator-solution.js

@@ -10,11 +10,13 @@ const sum = function (array) {
   return array.reduce((total, current) => total + current, 0);
 };
 
-const multiply = function (array) {
-  return array.length
-    ? array.reduce((accumulator, nextItem) => accumulator * nextItem)
-    : 0;
-};
+const multiply = function(...args){
+  let product = 1;
+  for (let i = 0; i < args.length; i++) {
+    product *= args[i];
+  }
+  return product;
+ };
 
 const power = function (a, b) {
   return Math.pow(a, b);