Product of Array Except Self

Author: casentino

product-of-array-except-self/casentino.ts

@@ -0,0 +1,14 @@
+function productExceptSelf(nums: number[]): number[] {
+  const len = nums.length;
+  const result = new Array(len).fill(1);
+  let pre = 1;
+  let post = 1;
+  for (let i = 0; i < len; i++) {
+    result[i] *= pre;
+    pre *= nums[i];
+
+    result[len - i - 1] *= post;
+    post *= nums[len - i - 1];
+  }
+  return result;
+}