Tutorial for using docker to run Rails with Postgres and Redit

Simple 1 server solution for online hosting service (exp. Digital ocean) that allows simple heroku like deployment

DDD article about differences between domain and application service objects

• Domain services carry domain knowledge; application services don’t (ideally).
• Domain services hold domain logic that doesn’t naturally fit entities and value objects.
• Introduce domain services when you see that some logic cannot be attributed to an entity/value object because that would break their isolation.

Prefer lambdas over procs

• a Proc instance can be either lambda or a proc
• all lambdas are Procs
• all procs are Procs
• code blocks behave like procs
• you can determine the kind of Proc by calling lambda? on it lambda -> strict argument count lambada -> do not return from method when return is called in it

Summarize the use of access modifiers in the Ruby language.

Shows less used syntax and declaration. 

Simple show of defference and use case for each one.

Description of good Security practice during Rails app development