Create one-time subscription

Question

I need to create a subscription to an Observable that is immediately disposed of when it is first called.

Is there something like:

obser         


        

Answer 1

I had similar question.

Below was called even later on from different state changers. As I did not want to.

function foo() {
    // this was called many times which was not needed
    observable.subscribe(func);
    changeObservableState("new value");
}

I decided to try unsubscribe() after subscribe as below.

function foo() {
    // this was called ONE TIME
    observable.subscribe(func).unsubscribe();
    changeObservableState("new value");
}

subscribe(func).unsubscribe(); is like subscribeOnce(func).

I hope that helped you too.