Shannon Skipper havenwood

Introductory Material

Add Graal JIT Compilation to Your JVM Language in 5 Steps, A Tutorial http://stefan-marr.de/2015/11/add-graal-jit-compilation-to-your-jvm-language-in-5-easy-steps-step-1/
The SimpleLanguage, an example of using Truffle with great JavaDocs. It is the officle getting-started project: https://github.com/graalvm/simplelanguage
Truffle Tutorial, Christan Wimmer, PLDI 2016, 3h recording https://youtu.be/FJY96_6Y3a4 Slides

Ruby on Archlinux

I thought I would document my setup, since it's somewhat non-standard but working quite well for me.

What this does

Install major Ruby versions at their latest patch release
Allow to switch between them seamlessly
Use chruby
Encourage bundler usage

Unscientific Benchmark

The Benchmark

def is_prime? n
  (2...n).all? { |i| n % i != 0 }
end

def sexy_primes n

tmux cheatsheet

As configured in my dotfiles.

start new:

tmux

start new with session name:

I'm a fan of MiniTest::Spec. It strikes a nice balance between the simplicity of TestUnit and the readable syntax of RSpec. When I first switched from RSpec to MiniTest::Spec, one thing I was worried I would miss was the ability to add matchers. (A note in terminology: "matchers" in MiniTest::Spec refer to something completely different than "matchers" in RSpec. I won't get into it, but from now on, let's use the proper term: "expectations").

Understanding MiniTest::Expectations

Let's take a look in the code (I'm specifically referring to the gem, not the standard library that's built into Ruby 1.9):

# minitest/spec.rb

module MiniTest::Expectations

	#!/usr/bin/env ruby

	# frozen_string_literal: true

	require 'json'
	require 'optionparser'

	KEYWORDS = %i[color metadata glow_in_the_dark coats].freeze
	DEFAULTS = {coats: 3, glow_in_the_dark: true}.freeze

	class ZCombinator
	def initialize improver
	@improver = improver
	end

	def call gen
	eat_its_tail(gen).(
	->(gen) { @improver.(applicatively_eat_its_tail gen) }
	).(gen)
	end

	map = -> f {
	-> rf {
	-> acc, elem {
	rf[acc, f[elem]]
	}
	}
	}

	square = -> n { n**2 }
	add = -> acc, n { acc + n }

	require 'fiddle'

	class GVL
	handle = Fiddle::Handle::DEFAULT
	address = handle['rb_thread_blocking_region']
	func = Fiddle::Function.new address, [Fiddle::TYPE_VOIDP,
	Fiddle::TYPE_VOIDP,
	Fiddle::TYPE_VOIDP,
	Fiddle::TYPE_VOIDP], Fiddle::TYPE_VOIDP

	#!/usr/bin/env ruby

	class Time
	WEEKDAYS = %w[ Sunday Monday Tuesday Wednesday Thursday Friday Saturday ]

	def day_before_yesterday
	xday -2
	end

	def yesterday