Reactive Programming

Introduction

In my last two articles part 1 and part 2, concept of future, which represents single data eventually available later, was discussed.

Future represents single item which will be available in async way. How do we represent multiple items which will be available in async way? Observable represents programming notation of multiple items which will be available in future (async stream of data).

|            |Single Item        |Multiple Items         |
|            |-------------------|-----------------------|
|synchronous |T…