The tip that saved me HOURS of refactoring time - Advanced TypeScript

folks this one simple trick will improve your refactoring whenever you need to use like an undefined value in typescript here i've got a create user function where i'm creating a bunch of different users but i've now got a new requirement here which is i also need to add a role to some users and some not so here what i could do is i could say for some users i'm going to pass them a role which is going to be admin like this except i reall...