Introduction

Dataflow is a library which enable you to implement software by Dataflow programming.
Dataflow programming is not a easy programming paradigm but basically focus on "data flow" of a software.
The initial concept of Dataflow is that programmer can use two abstract class "observer" and "observable".
And these two classes are the basic component of data flow.

observable | observer;

The observer receive data from the observable and this flow is executed aynchronously.
The class could be ether "observable" and "observer" then you can express it like below:

observable | observable; observer | observer; observable | observer | observer; observable | observable | observer;

And we can use filter to get specific type of data from observable.

observable[filter exp] | observer; observable | observer[filter exp];

observer will get data only filtered. If you indicate filter as "[*]" observer will get all data emited by observable.