robert-stuttaford

Cognician's new architecture with Clojure and Datomic: Notes

• These notes accompany a talk I gave on the 19th of April at ScaleConf 2013.

• @RobStuttaford

• Slides: https://speakerdeck.com/robertstuttaford/cognicians-new-architecture-with-clojure-and-datomic

General interest

robert-stuttaford

Functional programming isn't scary: Notes

• These notes accompany a talk I gave on the 15th of May at the Computer Science Dept of UCT.

• @RobStuttaford

• Slides: https://speakerdeck.com/robertstuttaford/functional-programming-star-isnt-star-scary

About Clojure

robert-stuttaford

(def conn (d/conn some-uri))

(def some-id 12345)

(defn get-v [db] (ffirst (d/q '[:find ?v :in $ ?e :where [?e :some/attribute ?v]] db some-id)))

(get-v (d/db conn))
;; => :some-value

(def tx [[:db/retract some-id :some/attribute :some-value]

robert-stuttaford

(defn start-session!
  []
  ;; put-value! talks to ring's sessions dsl
  (put-value! :session-uuid (db/new-uuid)))

(defn uuid
  []
  ;; get-value talks to ring's sessions dsl
  (get-value :session-uuid))

robert-stuttaford

Check out README.md to get started editing Clojure with Emacs.

robert-stuttaford

Compass / SASS / SCSS

• http://compass-style.org/reference/compass
• http://37signals.com/svn/posts/3271-easy-retina-ready-images-using-scss
• https://github.com/paranoida/sass-mediaqueries
• http://web-design-weekly.com/2013/05/12/handy-sass-mixins

CSS

• http://css3clickchart.com
• http://dochub.io/
• http://kushagragour.in/lab/hint/

robert-stuttaford

Gain massive leverage in your tech stack with Clojure: Notes

• These notes accompany a talk I gave on the 9th of October at Tech4Africa 2013.

• Twitter: @RobStuttaford

Materials for this talk

• Slides: https://speakerdeck.com/robertstuttaford/gain-massive-leverage-in-your-tech-stack-with-clojure
• Source code: https://github.com/robert-stuttaford/leverage

robert-stuttaford

Immutable data...base?: Notes

These notes accompany a talk I gave on the 6th of February at RubyFuza 2014.

• Twitter: @RobStuttaford

Materials for this talk

• Slides: https://speakerdeck.com/robertstuttaford/immutable-data-dot-dot-dot-base
• Code: https://github.com/robert-stuttaford/rubyfuza

robert-stuttaford

(ns app
  (:require [om.core :as om :include-macros true]))
            
(defn log-tx [tx-data root-cursor]
  (let [{:keys [path old-value new-value]} tx-data
        c js/console]
    (doto c (.group (str "TRANSACTION " path)) (.groupCollapsed "OLD"))
    (prn (pr-str old-value))
    (doto c (.groupEnd) (.group "NEW"))
    (prn (pr-str new-value))

robert-stuttaford

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;; Connection

(defprotocol DatomicConnection
  (as-conn [_]))

(extend-protocol DatomicConnection
  datomic.Connection
  (as-conn [c] c)
  datomic.db.Db