ngrx - RxJs: subscription performed twice -


i've created subscription:

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();

it's performed (do code) twice.

could tell me why?

you getting undefined values first time. try using zip instead of combinelatest.


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