License Plates
May 16, 2017
A license plate number has form ABC-123, three letters followed by three digits. You are to store the set of license plate numbers, assume you will have about a hundred thousand of them, and be able to answer queries like:
* Is license plate PLB-123 a member of the set?
* How many license plates begin with the letters PLB?
* What is the list of license plates that begin with the letters PLB?
Your task is to write programs to store and query a list of license plate numbers. When you are finished, you are welcome to read or run a suggested solution, or to post your own solution or discuss the exercise in the comments below.
Programming Praxis 