Sometimes, you may require to listen only on the onComplete of a producer. The ignoreElements operator helps you to do that. Please refer to the following code:

    fun main(args: Array<String>) { 
      val observable = Observable.range(1,10) 
      observable 
        .ignoreElements() 
        .subscribe { println("Completed") }//(1) 
    } 

The ignoreElements operator returns a Completable monad, which only has the onComplete event.

We will look into the skip and take operators in Chapter 6, More on Operators and Error Handling while discussing conditional operators.