Summary

This chapter contained information that is vital when working with coroutines. Knowing about the different states of a job and how to calculate the current one is important in order to monitor them. Let's recap the topics that were covered in this chapter:

• Job is used for background tasks that don't return anything.
• Deferred is used when the background operation returns something that we want to receive.
• A job can have many states: New, Active, Canceling, Cancelled, and Completed.
• The isActive, isCancelled, and isCompletedproperties can be used to determine the current state of a job.
• Deferred extends job to add the possibility to return something.
• The possible states of deferred are the same as that of a job.
• A job's state can only move forward; it can't be returned to a previous state.
• A final state is one of the states from which a job can't move.
• The final states of job are Cancelled and Completed.
• If deferred is waited on using join(), it's mandatory to validate whether it was cancelled...