cpursley

PostgreSQL is Enough

• Simplify: move code into database functions
• Just Use Postgres for Everything
• PostgreSQL is the worlds’ best database
• Postgres is eating the database world
• Hacker News discussion

Background and Cron Jobs

lilactown

# Add these to your .bash_profile / .zshrc / etc.

# Starts a Clojure repl
function rebel-clj() {
  clojure -Sdeps "{:deps {com.bhauman/rebel-readline {:mvn/version \"0.1.4\"} $@}}" -m rebel-readline.main
}

# Starts a browser REPL
function rebel-cljs() {
  clojure -Sdeps "{:deps {com.bhauman/figwheel-main {:mvn/version \"0.1.7\"} com.bhauman/rebel-readline-cljs {:mvn/version \"0.1.4\"} $@}}" -m figwheel.main

garybernhardt

This document has moved!

It's now here, in The Programmer's Compendium. The content is the same as before, but being part of the compendium means that it's actively maintained.

teropa

;; Credits:
;;
;; * ClojureScript
;; * Reagent https://reagent-project.github.io/
;; * Figwheel https://github.com/bhauman/lein-figwheel
;; * core.async https://clojure.github.io/core.async/
;; * Christophe Grand's Life implementation http://clj-me.cgrand.net/2011/08/19/conways-game-of-life/

(ns life.core
  (:require [reagent.core :as r]

rbnpi

#sample based voices for any bass_xxx_c samples over 4 octave range from :c2 to :c5 by Robin Newman December 2014
#use pl(inst,n,d=0.2,pan=0,v=0.8) to play a note where n is note symbol,d duration,v volume
#or plarray(inst,nt,dur,sh=0,vol=0.8,pan=0) to play lists of note symbols and durations
#where inst is samplename,nt and dur are note symbol and duration arrays,sh transpose shift
use_debug false
rm = 2**(1.0/12) #rate multiplier between adjacent semitones (twelth root of 2)
inst = :bass_hard_c #to define scope of inst variable set up here. Used as a parameter later
s=1.0/16 #speed multiplier give 2 crotchet/sec or 120 bpm
shift=0

rbnpi

#a Glass Armonica "voice" for Sonic Pi by Robin Newman November 2014
# revised to use rpitch 2018; corrected 2022 for missing tr function
#This simulates the Glass Armonica invented by Benjamin Franklin and for which Mozart
#composed the piece played here
#This version uses rpitch: parameter added to Sonic Pi after the original was written in 2014
##| sample :ambi_glass_rub
##| play :fs5
##| puts note(:fs5)
##| stop
use_debug false

gshaw

# NullStorage provider for CarrierWave for use in tests.  Doesn't actually
# upload or store files but allows test to pass as if files were stored and
# the use of fixtures.
class NullStorage
  attr_reader :uploader

  def initialize(uploader)
    @uploader = uploader
  end

john2x

Clojure Destructuring Tutorial and Cheat Sheet

(Related blog post)

Simply put, destructuring in Clojure is a way extract values from a datastructure and bind them to symbols, without having to explicitly traverse the datstructure. It allows for elegant and concise Clojure code.

Vectors and Sequences

twinforces

Title: MMD Cheat Sheet
Author: Pierce T. Wetter III
Email: pierce@twinforces.com
Date: September 6, 2013

### Basics ###

| What | | Syntax |  
| :------------ | -- |  :----------- |
| *Italic* | |  \*Italic\* or \_Italic\_|

ecmendenhall

(ns primes.core)

(defn trial-division [n divisor factors]
  (if (< n 2)
    factors
    (if (= 0 (mod n divisor))
      (recur (/ n divisor) divisor (conj factors divisor))
      (recur n (inc divisor) factors))))

(defn prime-factors [n]