REPL Driven Mobile Development with Clojure(script)

Talk slides as presented in #FragmentsConf 2017.

Transcript

1. REPL Driven Mobile Development with Clojure(script) Srihari Sriraman | nilenso
3. when did you become an expert in building mobile applications? last night, ofc
4. I have leapfrogged
5. Why I am speaking about this Using cljsrn, we built the same app as a native team faster, and better.
6. The things I will talk about Why REPL Driven Development CLJSRN Non tech factors
7. Parlance
8. REPL Https://en.wikipedia.org/wiki/ Read–eval–print_loop Read, Eval, Print, Loop “interactive computer programming environment that takes single expressions, evaluates them, and returns the result to the user.
9. REPL Https://en.wikipedia.org/wiki/ Read–eval–print_loop Read, Eval, Print, Loop
10. Lisp http://lisp-lang.org/ LISt Processor Second oldest HLL Homoiconic
11. Lisp http://lisp-lang.org/ LISt Processor Second oldest HLL Homoiconic
12. Clojure https://clojure.org/ Clojure is a dialect of Lisp that runs on the JVM
13. Clojure https://clojure.org/ Clojure is a dialect of Lisp Runs on the JVM Rich Hickey
14. Clojure(script) http://clojurescript.org/ ClojureScript is a compiler for Clojure that targets JavaScript David Nolen
15. Clojure(script) http://clojurescript.org/ ClojureScript is a compiler for Clojure that targets JavaScript David Nolen
16. CLJSRN http://cljsrn.org ClojureScript is a compiler for Clojure that targets JavaScript. A framework for building native apps using React
17. Feedback
18. Bret Victor - Inventing on Principle https://vimeo.com/36579366 “Most of my time is spent in code, working in a text editor blindly, without an immediate connection to what I'm trying to make."
25. Bret Victor - Inventing on Principle https://vimeo.com/36579366 “Creators need an immediate connection to what they create”
26. Stephen Wolfram – Inside the Wolfram Language https://www.youtube.com/watch?v=EjCWdsrVcBM
27. Ron Garret - Lisping at JPL http://www.flownet.com/gat/jpl-lisp.html “Debugging a program running on a $100M piece of hardware that is 100 million miles away is an interesting experience. Having a read-eval-print loop running on the spacecraft proved invaluable in finding and fixing the problem.”
28. Sam Aaron –Programming Music with Overtone - Sam Aaron https://www.youtube.com/watch?v=imoWGsipe4k Zach Oakes –Making Games at Runtime with Clojure https://www.youtube.com/watch?v=0GzzFeS5cMc Me – Making machines that make music https://www.youtube.com/watch?v=ZvSSeuzN_b4 Clojure land
29. REPL Driven Development
30. Clojurescript Clojure Compiler Javascript Google Closure Compiler Optimized Javascript RN flow How cljsrn gets to a mobile
31. Demo
32. What is a REPL? More than a Shell Interact with running program Define and modify behaviour Read and write access to program’s state In the editor
33. Why use a REPL? Why Clojure REPL? Why CLJS?
34. Why use a REPL? Feedback Explore and internalise the problem Incremental development of the solution Faster than TDD Debuggability
35. Why use a Clojure REPL? 60y of LISP Functions and Data structures, mostly Read, Eval, and Print are overridable functions Access to runtime: Reflections as data Namespaces, vars
36. Why clojurescript? Expressive, Simple Seamless JS Interop Immutable data structures by default Google closure
37. Expressive, Simple Javascript Clojurescript
38. Why clojurescript? Expressive, Simple Seamless JS Interop Immutable data structures by default Google closure
39. Seamless JS interop
40. Why clojurescript? Expressive, Simple Seamless JS Interop Immutable data structures by default Google closure
41. Why clojurescript? Expressive, Simple Seamless JS Interop Immutable data structures by default Google closure
42. Tools figwheel: watchman++ re-frame: SPA framework (predates elm, redux) core.async: no callback hell!
43. Reservations Hiring: Lisps are very different Learning: Community is small
44. Non tech factors
46. Undivided Team Ability to have a full picture Quick feedback cycles Well defined APIs No Specialists
47. Unilingual Team “Use the source” Share code Make PRs across FE and BE Shared tools, and release processes
49. REPL Driven Mobile Development with Clojure(script) Srihari Sriraman | nilenso