mikera

;; *clojure-version*
;; (require '[taoensso.encore :as encore])

(let [v [1 2 3 4]
      x 1
      y 2
      z 3]

  (encore/qbench ; Returns fastest of 3 sets of lap times for each form, in msecs
    1000000 ; Number of laps

mikera

;; Using criterium to test performance of Tuples
;;
;; Benchmark using parts of the core.matrix implementation test suite
;;
;; ===========================================================
;; Common setup:

(use '[criterium.core :as c])
(require 'clojure.core.matrix.compliance-tester)

mikera

;; =======================================================================
;; Motivation: we are interested in the performance of tiny
;; wrapper functions which look like:
;;    (fn [_ x y] (g x y))
;;
;; Question: are they getting the full performance benefits of inlining?

(ns test
  (:require [criterium.core :as c]))

mikera

(use '[clojure.core.match :only [match]])

(defn evaluate [env [sym x y]]
  (match [sym]
    ['Number]   x
    ['Add]      (+ (evaluate env x) (evaluate env y))
    ['Multiply] (* (evaluate env x) (evaluate env y))
    ['Variable] (env x)))
    
(def environment {"a" 3, "b" 4, "c" 5})

mikera

(sample-normal 5)
=> (-0.10224658005696823 -0.39374760130345093 -0.9347003327466611 0.027885002566669224 -0.5329681018922551)

(view (histogram (sample-normal 1000)))

(view (function-plot sin -10 10))

mikera

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Frequency analysis (implicitly treating a string as a sequence of chars)

(frequencies "abracadabra")

=> {\a 5, \b 2, \r 2, \c 1, \d 1}

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Infinite, lazily calculated sequence of Fibonacci numbers

mikera

;; enodyt's solution to Game of Life
;; https://4clojure.com/problem/94

(fn [board]
    (let [dx (count (first board))
          dy (count board)
          neighbours (fn [pos board]
                       (let [xs [[-1 -1] [0 -1] [1 -1]
                                 [-1  0]        [1  0]
                                 [-1  1] [0  1] [1  1]]]

mikera

;; Objective
;;   1. Learn Clojure by doing Clojure
;;
;; Pre-requisites
;;   You need to have a running Clojure REPL
;;   see:    http://clojure.org/getting_started

; Hello World in Clojure
(println "Hello World")

mikera

;; event application with subsequent events
;; event :: state -> (state' [event])

(defn update-with-events [state events]
  (if-let [event (first events)]
    (let [other-events (rest events)
          [updated-state  new-events] (event game)]
      (recur updated-state  (concat other-events new-events)))
    state ))

mikera

(def test-map 
  {:a 1 :b 2})