product-of-array-except-self solution

Author: Moonjonghoo

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

@@ -0,0 +1,22 @@
+/**
+ * @param {number[]} nums
+ * @return {number[]}
+ */
+var productExceptSelf = function (nums) {
+  let answer = [];
+  answer[0] = 1;
+
+  for (let i = 1; i < nums.length; i++) {
+    answer[i] = answer[i - 1] * nums[i - 1];
+  }
+  let right = 1;
+
+  for (let i = nums.length - 1; i >= 0; i--) {
+    answer[i] *= right;
+    right *= nums[i];
+  }
+  return answer;
+};
+
+productExceptSelf([1, 2, 3, 4]);
+productExceptSelf([-1, 1, 0, -3, 3]);