Why clojure?

What we’re craving for?

In our everyday developer life

simplicity / no incidental complexity
rapidity
clarity
feedback
fail-fast

Simplicity

KISS
Concentrate on the pb to solve, no incidental complexity that hides the true pb

Rapidity

We do have lots of stuffs to solve, the faster, the merrier
No fighting with something out of scope

Clarity

Be able to read code from anyone
Simplicity is intertwined here

Feedback

Want
- Know the fastest possible what’s wrong
- Unit Testing frameworks (midje, clojure.test)
Do not want
- launch some improbable command to know that
- setup an heavy environment to do that
  - wait for the CI server to feed us

Failfast

REPL

Why Clojure ?

addresses these problematics because it was created for that.

(Are we there yet? - Rich Hikey) perfect balance of idealism (lisp) and pragmatism (JVM)

Perfect Java interop.
Excellent parallel programming primitives (not threads)
Cure your parenthesophobia ! Reading (nested) lists of parenthesis can be hard at first, but it is simple, really ! easing the pain :
- Syntax to reduce the number of ():
  - Code is data (list), but most data is not list (so obviously not code)→[],{},#{}
  - Context is used for implicit grouping (i.e. of pairs of key, value)
- IDE to handle them :
  - writing → electric parenthesis
  - reading → rainbow
Only hard at the beginning, but the rewards (true meta-programming) lasts forever.

IDE

emacs

electric parenthesis

rainbow

clojure-jack-in

plugin eclise? intellij? - Do not know any as emacs is sufficient