Ngrx: combine to selectors -

i've built istore:

export interface istore {   user: iuser;   sources: isourceredux; } 

where iuser is:

export interface iuser {     id: string;     cname: string;     sname: string;     ... } 

and isourceredux is:

export interface isourceredux {     entities: { [key: string]: isource };     ids: array<string>;     selectedids: array<string>;     editingsource: isource;     defaultid: string; } 

so, i've created these selectors:

export const getsourcesstate = (state: istore) => state.sources; export const getselectedids = (sourcerdx: isourceredux) => sourcerdx.selectedids; export const getselectedsourceids = createselector(getsourcesstate, fromsources.getselectedids); 

so, now, in order check if user logged did that:

this.store$   .select(fromroot.getuserstate)   .filter(user => user.id != null && user.logged)   .do(user => this.store$.dispatch(...))   ... 

now i'm strugling getting user information , selectedsourceids @ same time in order check if:

1. a user logged (this.store$.select(fromroot.getuserstate)
2. then selectedsourceids (this.store.select(fromroot.getselectedsourceids))
3. dispatch action

how this?

this solution:

this.store$.combinelatest(       this.store$.select(fromroot.getuserentity),       this.store$.select(fromroot.getselectedsourceids),       (store, user, selectedsourceids) => ({user: user, selectedsourceids: selectedsourceids})      )     .filter((proj) => proj.user.id != null && proj.user.logged)     .do((proj) => this.store$.dispatch({type: 'delete_cards', payload: {username: proj.user.username, tokens: proj.selectedsourceids}}))     .take(1)     .subscribe(); 

i hope it's useful.