Po potoce - by the stream

Indirect tactics, efficiently applied, are inexhaustible as Heaven and Earth, unending as the flow of rivers and streams – Sun Tzu, The Art of War

My talk about how I got to understand reactive streams through C# and moved that knowledge to ClojureScript. Just to have my notion of programming changed forever.

Story

Childhood

Going by the streams

Using stones and ice in the winter as path

What the water does to the surroundings

You could get to places you can’t normaly

C#

Long running problem with deployment/watchdog/heartbeat SW

Interprocess communication

Helper processes

Several KLs of code

Creator is on parental leave

Rewrite in same spirit, just leave out what is not needed anymore

Big chunks of code just copied

Same architectur

Programmer got ill

I took over and wanted to test it

New start with ReactiveX

Timer loop based checks

Subscribing to only right info through LINQ

Library with fully tested code

Final aplications is only couple of lines, mostly config and orchestration

ClojureScript

Showrum

Simple markdown presentations

More decks

Maps&functions

Unbeareable after while

Too much checks and conditions

Potok

Reactives

RX.js

Beicon - Funcool

Sister lib of Potok - wraper of RX.js

Potok - Funcool

Czech word means stream

Reactive streams

Some promisses

New Beginning

Whats the fuss

It’s just queque

You can stream too

IOT

Proposal

https://eventil.com/events/polyconf-17/submissions/new

Abstract

Story of how work in C# I didn’t like, brought my attention to reactive streams which I transplanted to ClojureScript work I love (Polyglot you see ;-). And I will try to convince you both that ClojureScript is lovely and even better with reactive streams.

Private abstract

The main thing is to show reactive streams and how to use them on the web, but side themes lies in how we are actually modeling after the nature, and how mental transfer between not really similar languages, can lead to great benefit of the creator.

But the story starts in my childhood in the mountain area of the north bohemia, where we were going by the streams and ends with what I see as the new beginning for my attitude to programming.