Amb

Category: Combinator

Brief: Propagates the observable sequence that reacts first.

Input: Accepts many input types (single elements, tuples, arrays) as long as all inputs are of the same type

Output: Same as input

The Amb operator allows you to setup a race condition between two or more observable sequences. This operator will emit all the items only from the first of the input sequences to produce a notification. You can think of it as a choice between all of the input sequences, where the decision criteria is speed of first response.

As soon as the first item or notification arrives from the winning sequence, all the subscriptions to the remaining sequences will be cancelled.