I know firebase + android architecture 1.0 is a good combination.
but how about firebase + android architecture 1.0 + dagger2?
I am creating a social app and I have been studying on the Internet alone and I am confused.
I did a lot of research. but…
What is the regex using javax.validation.constraints @Pattern for user not to be able to choose username such as "admin" or "manager"?
I am not understanding how to use "?!" to indicate word which must be excluded. Could you please suggest some…