Select store inside store from the appState

Question

I have a store like this

    {
      rootStore: {
        firstStore: {
          el: false,
          sec: false,
          th: []
        }
      }
    }

how can i get the first store in one go (using one select statement), now I use

() => (state: Observable<any>) => state.select('rootStore').select('firstStore');

Answer 1

You would have to use map:

() => (state: Observable<any>) => state.map(store => store.rootStore.firstStore);

As an alternative, since select is basically an alias for pluck this works as well:

() => (state: Observable<any>) => state.select('rootStore', 'firstStore');