Add product-of-array-except-self solution

Author: Jeehay28

product-of-array-except-self/Jeehay28.js

@@ -0,0 +1,30 @@
+/**
+ * @param {number[]} nums
+ * @return {number[]}
+ */
+
+// Time Complexity: O(n)
+// Space Complexity: O(n)
+var productExceptSelf = function (nums) {
+
+    let result = [];
+
+    let left = Array(nums.length).fill(1)
+    let right = Array(nums.length).fill(1)
+
+    for (let i = 1; i < nums.length; i++) {
+
+        left[i] = left[i - 1] * nums[i - 1];
+        right[nums.length - 1 - i] = right[right.length - i] * nums[nums.length - i]
+
+    }
+
+    for (let i = 0; i < nums.length; i++) {
+        result[i] = left[i] * right[i];
+    }
+
+    return result;
+
+
+};
+