solve: contains duplicate

Author: wogha95

contains-duplicate/wogha95.js

@@ -0,0 +1,10 @@
+// TC: O(N)
+// SC: O(N)
+
+/**
+ * @param {number[]} nums
+ * @return {boolean}
+ */
+var containsDuplicate = function (nums) {
+  return nums.length !== new Set(nums).size;
+};