What's the difference between design patterns and design principles?

Question

I\'m new to Ruby on Rails, and I went through these articles.

• Design Patterns in Ruby: Observer, Singleton
• Design Patterns in Ruby

But

Answer 1

To some extent, we can refer principles as a set of rules that we can follow in every step of programming, but patterns are a set of structured solutions for some specific problems that we may face during coding -not always happening.