Can I explain how an associative array differs from a hash table and a dictionary, and how they work?

An associative array, hash table, and dictionary are data structures for storing key-value pairs, but with some differences in terminology and implementation.

• Associative array — a general term for a structure where data is stored by key rather than by index. It is a concept.
• Hash table — a specific implementation of an associative array, where keys are transformed into an array index using a hash function for quick access.
• Dictionary in Python — a built-in data type implemented as a hash table.

Example of a dictionary in Python:

my_dict = {'apple': 1, 'banana': 2}
print(my_dict['apple'])  # Outputs 1

Thus, a dictionary is an associative array implemented via a hash table.