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class Instructor::LessonsController < ApplicationController
  before_action :authenticate_user!
  before_action :require_authorized_for_current_section, only: [:new, :create]
  before_action :require_authorized_for_current_lesson, only: [:update]

  def new
    @lesson = Lesson.new
  end

  def create

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<!-- Load Bootstrap from a CDN -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" integrity="sha384-1q8mTJOASx8j1Au+a5WDVnPi2lkFfwwEAa8hDDdjZlpLegxhjVME1fgjWPGmkzs7" crossorigin="anonymous">

<!-- Put inside a bootstrap div -->
<div class="col-xs-10 col-xs-offset-1">
	<h1>Hello</h1>

	<img src="http://imgur.com/Q5GpJMB.png" class="face big img-center center-block img-responsive"/>
</div>

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Setting up the ES6 Sandbox

The configuration of tools like babel are one of the things that throws off beginners when learning to use the technology. We've setup our vagrant environment to give the folder /vagrant/src/es6-sandbox everything it needs to start working with the ES6 programming language (without worrying about getting the perfect babel configuration).

There are a few things we needed to do to supercharge babel to work in this environment. Here are a few concepts that exist in babel and how we configured our ES6 Sandbox to work.

Setting Up Babel

We used NPM to install babel in the environment by executing the command:

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Running Two Vagrant Environments in Parallel.

Two different vagrant environments can be run on the same machine. Here's how.

First, make sure you're initial vagrant environment is powered down. Move to the directory the environment is listed by running this command:

cd Desktop/vagrant

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To run:

babel-node --presets es2015 runner.js

Output:

12 is 10 away from 22

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a = []

a.push(1) # enqueue the number 1 in the queue
a.push(2) # enqueue the number 2 in the queue
a.push(3) # enqueue the number 3 in the queue

# dequeue the first element, 1 has been in the queue longest
puts a.shift  # => displays 1

a.push(4) # enqueue the number 4 in the queue

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def binary_search(target, list)
  position = (list.count / 2).floor
  mid = list[position]

  return mid if mid == target

  if(mid < target)
    return binary_search(target, list.slice(position + 1, list.count/2))
  else
    return binary_search(target, list.slice(0, list.count/2))

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def binary_search(target, list)
  # find the middle position number
  position = (list.count / 2).floor

  # look up the item in the middle position
  mid = list[position]

  # if we've found it, we're done
  return mid if mid == target

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class LinkedListNode
  attr_accessor :value, :next_node
 
  def initialize(value, next_node=nil)
    @value = value
    @next_node = next_node
  end

  # node3.print_value
  def print_values

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# generate all of the touples such that
# the first value and the second value summed
# is less than or equal to the value presented

def touples(n)
  touple_values = []
  n.times do |x|
    n.times do |y|
      touple_values.push([x, y])
    end