| public concatMap ( callable $selector, callable $resultSelector = null ) : Rx\Observable\AnonymousObservable | ||
| $selector | callable | A transform function to apply to each element from the source sequence onto. The selector is called with the following information: - the value of the element - the index of the element - the Observable object being subscribed |
| $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 concatMap(callable $selector, callable $resultSelector = null)
{
return $this->lift(function () use($selector, $resultSelector) {
return new ConcatMapOperator($selector, $resultSelector);
});
}