Description Difference Calculator is a program that determines the difference between two data structures. This is a popular task, for which there are many online services, for example: http://www.jsondiff.com/. A similar mechanism is used when outputting tests or when automatically tracking changes in configuration files.
Project demonstration:
step 7: https://asciinema.org/a/0MUfHCqhnVvIQoWLxErt28jzp