contains method
- Object needle
override
Returns whether needle
occurs in the elements provided by this stream.
Compares each element of this stream to needle
using Object.==.
If an equal element is found, the returned future is completed with true
.
If this stream ends without finding a match, the future is completed with
false
.
If this stream emits an error, or the call to Object.== throws, the returned future is completed with that error, and processing stops.
Implementation
@override
AsObservableFuture<bool> contains(Object needle) =>
AsObservableFuture<bool>(_stream.contains(needle));