Ben Holley benolee

N.B. to run his examples in emacs, you'll want these aliases:

(defalias 'plus #'+)
(defalias 'quotient #'/)
(defalias 'times #'*)
(defalias 'difference #'-)

Lisp: Atoms and Lists

This gist shows how to create a GIF screencast using only free OS X tools: QuickTime, ffmpeg, and gifsicle.

To capture the video (filesize: 19MB), using the free "QuickTime Player" application:

def wrap(string, before: "<", after: ">")
  "#{before}#{string}#{after}" # no need to retrieve options from a hash
end

# optional

mkdir proj
cd proj
git init

git config user.name 'username'

	class Command
	attr_accessor :pull, :push

	def initialize(name, *args)
	@name, @args, @pull, @push = name, args, *IO.pipe
	end

	def exec
	fork do
	pull.close

	#!/usr/bin/env PeanutButterJellyTime
	# -----------------------------------------------------------------------------
	# keyword => C equiv (description)
	# -----------------------------------------------------------------------------
	# peanut => ++*ptr (increase value of cell)
	# PEANUT => ++ptr (move to next cell)
	# butter => --*ptr (decrease value of cell)
	# BUTTER => --ptr (move to previous cell)
	# jelly => putchar(*ptr) (print character value of cell)
	# JELLY => *ptr=getchar() (store numeric value of char input in cell)

	# slide 77 from waza talk
	# method definition with static scope, class eval'd in a string

	# Environment

	class Foo
	hello = "world!"
	define_method("foo") { hello }

	class_eval "def bar; hello; end"

	=Navigating=
	visit('/projects')
	visit(post_comments_path(post))

	=Clicking links and buttons=
	click_link('id-of-link')
	click_link('Link Text')
	click_button('Save')
	click('Link Text') # Click either a link or a button
	click('Button Value')

	.DS_Store
	tmp/