parse some ruby code from a separate file, write a ruby program which can pull specific data from the parsed code

I need a ruby exercise completed. It requires the coder to take a precreated file, parse the code from the file into an array of hashes, take the data from those hashes and create somewhat of a database, you CANNOT use an actual database or an ORM you must write the code yourself. Using that data, you must write a ruby program which can pull whichever specific data is required. I have completed a good portion of the code myself and the rest of the code should be similar to mine, this needs to be done within 1-3 hours max