Some are similar to those we need for vectors. Remove something from the dictionary. Others correspond more to the different structure of dictionaries. Dictionaries vs. Databases Note that dictionaries are not the same as databases. There are a number of reasons.
Dictionaries have a single key, and that key provides the only way to access information.
Databases may have multiple keys. You may also access information using other fields. A dictionary returns a single object given a request. Filled in the details, primarily from outline 40 of CSC152 99F Added section on puzzles. Solving with Linear Structures .