#TITLE: About Clojure
Nikolai Ryzhikov CoF & CTO of Health Samurai
2022 July, Budva
Health Samurai
- we are crafting FHIR+ platform for healthcare apps
- on of the biggest in Europa clojurians company ~50
Why clojure?
- piece of art (simplicity)
- functional paradigm
- performance
- parallelism & concurrency
- isomorphic - backend, frontend, babashka
- java & js eco-system
- work in Health Samurai
ART
- simplicity
- conceptual consistency
- no one breaking change
—
Promises in js from clj
FP
FP is extremely simple
- design with functions - procedures - good component
- pure functions - ideal
- 20/80 dirty
Performance & Concurrency
- it is fast - can be as fast as Java
- java memory model
Isomorphic * Eco-system
- all java & js libraries
- react story
- back/front & babashka
Links
- Greatest Hits - https://changelog.com/posts/rich-hickeys-greatest-hits
- History
Interactive development!
- REPL as a quintessence of clojure design
- emacs (spacemacs) + cider <<-
Clojure is JS–
- syntax - LISP
- classes & objects
- mutable state
How to read clojure
(a b c) => [a, b, c]
1 + 1 => (+ 1 1) fn(a,b) => (fn a b) if(cond) {} else {} => (if (cond) (expr) (expr)) funct(){…} => (func [args] …)
Developers UX!
- setup emacs
- learn bindings
- start REPL
Run presentation
docker-compose up -d emacs src/budva/core.clj :cider-jack-in