Advanced operators

Sometimes, we need functions to create message repetitions or to manipulate or reuse a subscription with multiple observers. This is the time when advanced operators come into play.

IgnoreElements

The IgnoreElements factory method creates a new sequence that will ignore any value message. Instead, errors and completion messages will normally flow out from the sourcing sequence.

This method is particularly useful to create multiple acknowledgements or simply to append some completion code to a sourcing sequence. Here's an example:

//the sourcing sequence of errors or completed messages 
var sourcingSequence = Observable.Throw<object>(new Exception("Test")); 
 
//a sequence able to handle only errors or completed messages 
var ignoredElements = sourcingSequence.IgnoreElements(); 
ignoredElements.Subscribe(new ConsoleObserver()); 

The ConsoleObserver class is the same as that of the previous examples. See the Interval or Create sections in...