feat: 217.Contains Duplicate

Author: gwbaik9717

contains-duplicate/ganu.js

@@ -0,0 +1,12 @@
+// Time complexity: O(n)
+// Space complexity: O(n)
+
+/**
+ * @param {number[]} nums
+ * @return {boolean}
+ */
+var containsDuplicate = function (nums) {
+  const set = new Set(nums);
+
+  return set.size !== nums.length;
+};