contains-duplicate solution

Author: Jaehyeon Robert Han

contains-duplicate/Zioq.js

@@ -0,0 +1,28 @@
+/**
+ * @param {number[]} nums
+ * @return {boolean}
+ */
+var containsDuplicate = function(nums) {
+    let dup_set = new Set(); // Initialize Set
+    for (let num of nums) {
+        dup_set.add(num) // Add value into the set (duplicated value will be ignored)
+    }
+
+    if(dup_set.size !== nums.length) {
+        return true
+    }
+    return false
+};
+
+/* 
+    Space Complexity - O(n) - Create a set to store elements
+    Time Complexity - O(n) - Traverse through the array
+*/
+
+
+/* Test code */
+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
+
+