| public concatMapTo ( rx\ObservableInterface $observable, callable $resultSelector = null ) : Rx\Observable\AnonymousObservable | ||
| $observable | rx\ObservableInterface | - An an observable sequence to project each element from the source sequence onto. |
| $resultSelector | callable | A transform function to apply to each element of the intermediate sequence. The resultSelector is called with the following information: - the value of the outer element - the value of the inner element - the index of the outer element - the index of the inner element |
| return | Rx\Observable\AnonymousObservable | An observable sequence whose elements are the result of invoking the one-to-many transform function collectionSelector on each element of the input sequence and then mapping each of those sequence elements and their corresponding source element to a result element. |
public function concatMapTo(ObservableInterface $observable, callable $resultSelector = null)
{
return $this->concatMap(function () use($observable) {
return $observable;
}, $resultSelector);
}