contains-duplicate

Author: yg-cho

contains-duplicate/Yg-cho.js

@@ -0,0 +1,11 @@
+/**
+ * @param {number[]} nums
+ * @return {boolean}
+ */
+var containsDuplicate = function(nums) {
+  return new Set(nums).size !== nums.length;
+};
+
+//console.log(containsDuplicate([1, 2, 3, 1])); // true
+// console.log(containsDuplicate([1, 2, 3, 4])); // false
+// console.log(containsDuplicate([1, 1, 1, 3, 3, 4, 3, 2, 4, 2])); // true