Operators used in this application

Now, the structure of the application is ready. Before going into its implementation, some more operators will be described here, four new operators that will be used in the application:

• The skip operator
• The filter operator
• The flat_map operator
• The let operator

The skip operator

The skip operator omits the first n items emitted by the input observable and emits all other items of the input observable on the output observable. The following figure shows the workings of this operator:

Figure 6.4: The skip operator

The prototype of this operator is the following one:

Observable.skip(self, count)

The count parameter is the number of items to skip before emitting some items.

Here is an example...