kylev

FROM ruby:2.6-alpine

# Additional runtime facilities provided by the OS.
RUN apk add --no-cache libxml2 libxslt postgresql-libs tzdata
# Tell bundler how to use the OS.
RUN gem install bundler -v '~> 1.17' && \
        bundle config build.nokogiri --use-system-libraries
WORKDIR /opt/app
RUN mkdir -p tmp/pids tmp/cache

kylev

(ns tutorial.maryhad
  "Implementation of \"Mary Had a Little Lamb\"

  Found here:
  http://www.pianolessons4children.com/sheetmusic/Mary_Had_a_Little_Lamb_C_Major.pdf"
  (:require [leipzig.live :as live]
            [leipzig.melody :refer :all]
            [leipzig.scale :as scale]
            [overtone.inst.piano :refer [piano]]
            [overtone.live :refer :all]))

kylev

require 'json'
require 'bson'

a = BSON::ObjectId.new
b = BSON::ObjectId.new

puts a.to_json
# {"$oid":"5837b91f775ab9717f8d8bc9"}
puts b.to_json
# {"$oid":"5837b92c775ab9717f8d8bca"}

kylev

#!/usr/bin/env ruby

# List all the (known) operations on each AWS service API. This is
# incredibly useful for building well-restricted IAM access
# rules. With this list you can quickly see what "s3:Get*" matches, or
# just glance through and look for something that might be missing and
# breaking your app.

# I can't believe I had to write this myself. I'm pretty sure there
# are a lot of people out there with near-god-mode permission on IAM

kylev

/**
 * MIDI Visual Metronome
 * 
 * Developed on Sparkfun Uno R3 and Sparkfun MIDI Shield.
 * 
 * Reqires the popular FortySevenEffects MIDI library:
 * https://github.com/FortySevenEffects/arduino_midi_library
 * 
 * The intended application is with MIDI and electronic music in
 * a situation where proper stage or in-ear monitors are not

kylev

function noBar() {
  console.log(bar());
}
// ReferenceError: bar is not defined

function hoistedVar() {
  console.log(bar());

  var bar = function() {
    return 42;

kylev

 #!/usr/bin/env ruby

# Some members of ruby community continue to misunderstand the interplay of
# signal handlers and exception handling. This is a brief exploration
# via examples. You can run them by uncommenting the invocations at
# the bottom. You can see their behavior with Ctrl-C.
#
# Some of the examples will require a kill -9 from another terminal to
# stop.
#

kylev

# Create happily takes IO-like objects as body.
file = directory.files.create(
  :key    => 'giant_linux_distro.iso',
  :body   => File.open("nightly.iso"), # No ma! No read()!
  :public => true
)

# Get will take a block for streamy goodness.
directory.files.get("giant_thing.bin") do |chunk, remaining, total|
  output.write(chunk)

kylev

class Object
  def wtf!
    raise (self.respond_to?(:pretty_inspect) ? self.pretty_inspect : self.inspect)
  end
end

kylev

module Capybara
  class Session

    # `execute_script` variant that first waits for jQuery's $ to be defined.
    def execute_jquery(script)
      synchronize_javascript("$ !== 'undefined'")
      execute_script(script)
    end

    # `evaluate_script` variant that first waits for jQuery's $ to be defined.