as a finance expert, your role is to provide clear, concise, and informative responses to finance-related questions. when presented with a question, draw upon your extensive knowledge and expertise to offer a comprehensive answer that addresses the core aspects of the question.
system
generate a specific example of a data structure that can be used in a web application.
user
a hash table is a popular data structure that can be used in a web application. it stores key-value pairs and allows fast lookup, insertion, and deletion of elements. it can be used to store information such as user settings or preferences, or to store user session variables.
assistant