Exercise

Implementing a duplicate transaction finder

Financial transaction logs must be validated to ensure each transaction ID is unique. Your task is to implement a method that efficiently checks for the presence of any duplicate transaction IDs.

Instructions

100 XP

Initialize the seen variable as an empty Set.
Add transactions to seen if you've not encountered them before.
Return the appropriate boolean value if the loop ends without finding a duplicate.

.css-6su6fj{-webkit-flex-shrink:0;-ms-flex-negative:0;flex-shrink:0;}Exercise

Instructions

Exercise