longest-consecutive-sequence solution

Author: Jeehay28

longest-consecutive-sequence/Jeehay28.js

@@ -0,0 +1,31 @@
+/**
+ * @param {number[]} nums
+ * @return {number}
+ */
+var longestConsecutive = function (nums) {
+  let result = [];
+  let longest = [];
+
+  numsSorted = nums.sort((a, b) => a - b);
+
+  numsFiltered = [...new Set(numsSorted)];
+
+  for (let i = 0; i < numsFiltered.length; i++) {
+    if (result.length === 0) {
+      result.push(numsFiltered[i]);
+    } else if (result.length >= 1) {
+      if (numsFiltered[i] === result[result.length - 1] + 1) {
+        result.push(numsFiltered[i]);
+      } else {
+        longest.push(result.length);
+        result = [numsFiltered[i]];
+      }
+    }
+  }
+
+  if (longest.length === 0) {
+    return result.length;
+  } else {
+    return Math.max(Math.max(...longest), result.length);
+  }
+};