Can you briefly explain the difference between Nokogiri and Mechanize?

Question

Ruby on Rails

Sorry, my English is hard and I think I'm confusing something.
There is Nokogiri and there is Mechanize. One can retrieve the data from the page and the other can retrieve the data. What's the difference?

Answer 1

Nokogiri - Parser html / xml, designed to parse pages, for example - to steal someone else's content and pass it off as your own.
Mechanize - A library for automating interaction with sites. Submit forms, click on links, set cookies, for example - you can write auto-posting on several resources.
Detailed examples are on their websites.

Answer 2

It's simple, the second uses the first to get the data.