What does $ sign at the end of function name indicate?

Question

Here is the code I\'m reviewing...

import { Observable } from \'rxjs/Rx\';
// reducer
import { playerRegister, PlayerState } from \'./player\';
export functi         


        

Answer 1

For a function it means it returns an observable.

For a variable it means it is an observable.

This notation is widely used in Angular projects and I find it very useful to quickly see that it is an observable and not the actual value.