Add product-of-array-except-self solution

Author: froggy1014

product-of-array-except-self/froggy1014.js

@@ -0,0 +1,21 @@
+/**
+ * @param {number[]} nums
+ * @return {number[]}
+ */
+var productExceptSelf = function (nums) {
+  const array = new Array(nums.length).fill(1);
+
+  for (let i = 1; i < nums.length; i++) {
+    array[i] = array[i - 1] * nums[i - 1];
+  }
+
+  let right = 1;
+  for (let i = nums.length - 1; i >= 0; i--) {
+    array[i] = array[i] * right;
+    right *= nums[i];
+  }
+
+  return array;
+};
+
+console.log(productExceptSelf([1, 2, 3, 4]));