The slides from my talk on Numerry at Functional Rotterdam 12. Numerry is a tool for plotting data quickly and easily. Many tools are already available, yet, to my knowledge, no one is really portable, nor allows for collaboration. It's a side project to learn functional programming, Clojure and ClojureScript in particular. It is still in its early days, but the pieces start to fit. The presentation covers its design and the constraints required to make it a useful tool.

1. Numerry
Visualisation made easy
@adrienhaxaire

2. Motivations

3. Motivation: Learn functional programming
1. Want to keep improving myself
2. Already know procedural and object oriented programming
3. Emacs Lisp

4. Motivation: Learn modern web development
1. Researcher in geoengineering turned scientific developer
2. Web development is the norm
3. Front end, UI/UX
4. Full stack

5. Motivation: Personal pain point

6. Motivation: Personal pain point
1. Many existing tools, yet all for desktop (except Sage)
2. Ease of use: text file, drag and drop, from the repl
3. Sharing

7. Yay!
I have found a
nice side project!

8. Stack

9. Stack: backend

10. Stack: backend
Why: prototyping

11. Stack: backend

12. Stack: backend

13. Stack: Frontend

14. Stack: Frontend
Tweet

15. Design

16. Constraint: language agnostic
1. Should work with any language
2. Or no language at all: drag and drop & terminal
3. Incentive for clients in many languages
4. Avoid trapping myself into the idioms of a language -> standards

17. Constraint: language agnostic
Not a Single Page Application

18. Constraint: open source
1. Can be installed, not an app only
2. Users! How to handle authentication, security?
3. Data: local, global, replication?

19. System

20. Code

21. core.clj
Start the websocket server

22. Update from RethinkDB
Define the websocket

23. RethinkDB’s changefeed
Async or not, optional argument

24. Ugly but works for now!

25. yes, hard-coded for debug
plot.js:46026 Uncaught InvalidStateError: Failed to
execute 'send' on 'WebSocket': Still in CONNECTING
state.

26. Recap
1. Found a nice project to burn my spare time in happiness
2. Full package: Clojure, RethinkDB, ClojureScript, Reagent
3. Advices/help welcome!
4. Links: Github, blog posts, Twitter