Code and Excercises from Professional Clojure

cljbasics or ch1

Contains code from the initial chapter. Code handles basic concepts like

• Principle of values
• Referential transparency
• Tail recursion .. loop/recur
• Mutual recursion ... trampoline
• High order functions
• Partial funtions
• Composition
• Laziness
• Atoms for synchronous uncordinated single state change
• Refs for coordinated state change with multiple objectd
• Defmulti defmethod for polymorhic dispatch
• Deftype and Defrecord for descriptions and actions
• Protocols for a named set of functions
• Persistent data structures

ch2

Rapid feedback cycles.

• REPL - basic use doc, find-doc, source, javadoc
• REPL - starting a nREPL server and client with lein repl or lein repl :start :host localhost :port xxxxx
• REPL - starting a headless nREPL server with lein repl :headless :host localhost :port xxxxx
• REPL - connecting to server with lein repl :connect localhost:xxxxx
• REPL - embedding REPL is server application with lein-ring plugin and :nrepl {:start? true}...
• REPL - code reload with org.clojure/tools.namespace and :reload

ch3

Web Services. Utilising coljure features e.g. expressivenes, immutable data structures, concurrency and re-use to easily create web services.

• Project structure with the compojure template: lein new compojure
• Ring for HTTP abstraction
• Compojure for routing
• example-project works through ring and compojure concepts
• ring-shortener summary project for CH3