What is the difference between gems in Ruby and regular libraries in other languages?

Question

Ruby on Rails

I have only recently begun studying this language and the technologies associated with it.

Answer 1

Due to all sorts of magic things like ObjectSpace, introspection and the ability to change the behavior of any object right at runtime, you have the opportunity to write a gem that will change the behavior of some components as you need. That is, you can do anything (in theory) by simply putting the right gems.
ps I'm not familiar with ruby ​​myself, so I can't say exactly how it all works. I know only approximately. But @CrusaderGo said it right - there is magic all around.

Answer 2

The presence of magic