Mr. Nicky questions

• Is it ok and safe to work with references passed to constructor - Java
• Is there a way to add custom keyboard shortcuts to Vim for running numerous commands?
• C++ How to properly copy container(vector) of pointers?
• Entity Framework Core - Multiple one-to-many relationships between two entities
• How to copy Context object without deriving
• C++ How to check the last modified time of a file

Mr. Nicky answers