contains duplicate

Author: 0-Chan

contains-duplicate/0-chan.ts

@@ -0,0 +1,8 @@
+/**
+ * time complexity : O(n)
+ * space complexity : O(n)
+ */
+function containsDuplicate(nums: number[]): boolean {
+    const hasDuplicate = new Set(nums).size !== nums.length;
+    return hasDuplicate;
+};