Added pivotIndex

jonasraoni · jonasraoni · commit f3b687364e7e · 2023-01-23T11:37:56.000+03:00
diff --git a/pivotIndex.js b/pivotIndex.js
@@ -0,0 +1,13 @@
+/**
+ * @param {number[]} nums
+ * @return {number}
+ */
+var pivotIndex = function(nums) {
+    nums.reduce((t, c, i) => nums[i] = t + c, 0);
+    for (let i = -1; ++i < nums.length;) {
+        if (~~nums[i - 1] === nums.at(-1) - nums[i]) {
+            return i;
+        }
+    }
+    return -1;
+};
