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# This builds a publicly available SSH server on EC2.
#
# Make sure to edit the path to your public SSH key.
#
# Log in:
#
#     $ ssh ubuntu@$(terraform output -raw public_ip)

terraform {
  required_providers {

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require "nokogiri"
require "open-uri"
require "optparse"
require "set"

MAX_DEPTH = 2

class Page
  def initialize(body:, url:)
    @body = body

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require "rspec/autorun"

# An implementation of an immutable binary search tree in Ruby, with a small
# suite of tests. Supports #==, #insert, #delete, and #to_a (an in-order
# traversal).
#
# To run the tests, just evaluate the file: `ruby binary_search_tree.rb`

class Leaf
  def ==(other)

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# Supposing that you're starting on the master branch...

# Create a new branch and switch to it:
git checkout -b my-work

# Commit your changes on that branch:
git add .
git commit -m "My work so far!"

# Update the master branch:

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class MessageDispatcher
  def initialize
    @observers = []
  end

  def register(observer)
    @observers << observer
  end

  def dispatch(message)

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#!/usr/bin/env ruby

class UnixProcess
  attr_reader :uid, :pid, :ppid, :cmd

  def initialize(uid:, pid:, ppid:, cmd:)
    @uid = uid
    @pid = pid
    @ppid = ppid
    @cmd = cmd

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#!/usr/bin/env ruby

class SayRepl
  attr_reader :voice

  def initialize(voice)
    @voice = voice
  end

  def go

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p (0..1000000).count{rand<Math.sqrt(1-rand**2)}/250000.0

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### Keybase proof

I hereby claim:

  * I am hrs on github.
  * I am hrs (https://keybase.io/hrs) on keybase.
  * I have a public key whose fingerprint is 1B41 8F2C 23DE DD9C 807E  A74F 841B 3DAE 25AE 721B

To claim this, I am signing this object:

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# attr_reader/writers/accessors are handy shortcuts for creating
# getter and setter methods. That's all they're for.

# An attr_reader creates a getter method. For example, the following
# two classes have identical effects:

class NamedWombat
  attr_reader :name

  def initialize(name)