Switching RxJava schedulers between app code and corresponding tests

A simple way to switch between using appropriate schedulers in app code and using trampoline schedulers for tests.

Make git forget a tracked file

What to do when you are tracking a file with git but then want to remove it from VCS while keeping it in your file system.

Don't worry about specializing yet!

What technologies should I be learning, so that they prove helpful in my career?