davidbella

class RackApp
  def call(env)
    [200, {"Content-Type" => "text/html"}, ["Hello Rack! - you requested #{env["REQUEST_PATH"]}"]]
  end
end

run RackApp.new

# lambda.call -- rack uses .call
#run lambda { |env| [200, {"Content-Type" => "text/html"}, [env.to_s]] }

davidbella

class Integer

  def to_roman
    numeral = ""
    number = self
    hash = {1000 => "M", 900 => "CM", 500 => "D", 400 => "CD", 100 => "C", 90 => "XC", 50 => "L", 40 => "XL", 10 => "X", 9 => "IX", 5 => "V", 4 => "IV", 1 => "I"}

    hash.each do |key, value|
      until number < key
        numeral << value

davidbella

RSpec.configure do |config|
  # Use color in STDOUT
  config.color_enabled = true

  # Use color not only in STDOUT but also in pagers and files
  config.tty = true

  # Use the specified formatter
  config.formatter = :progress # :progress, :html, :textmate
end

davidbella

class Integer
  @@conversion = {
    1 => ['I', 'V', 'X'],
    2 => ['X', 'L', 'C'],
    3 => ['C', 'D', 'M'],
    4 => ['M', 'M', 'M']
  }

  def to_roman
    numeral = self

davidbella

# Download this file:
# https://gist.github.com/aviflombaum/28534c5d69edd2439a7d/download

# Run it from your terminal with:
# ruby ruby.basics.rb
# (Just make sure you are in the right directory)

# ======================================
# Ignore All This Code
# ======================================

davidbella

class Person
  def initialize(attributes)
    attributes.each do |attribute_name, attribute_value|
      ##### Method one #####
      # Works just great, but uses something scary like eval
      # self.class.class_eval {attr_accessor attribute_name}
      # self.instance_variable_set("@#{attribute_name}", attribute_value)

      ##### Method two #####
      # Manually creates methods for both getter and setter and then 

davidbella

class TriangleError < StandardError
end

class Triangle
  def initialize(s1, s2, s3)
    @sides = [s1, s2, s3]

    if @sides.any? {|side| side <= 0}
      raise TriangleError.new, "Cannot create a triangle "
    end

davidbella

class School
  attr_accessor :roster

  def initialize(name)
    @roster = {}
  end

  def add_student(name, grade)
    @roster[grade] ||= []
    @roster[grade] << name

davidbella

require 'simplecov'
SimpleCov.start
require 'json'
require 'rspec'
 
require_relative '../lib/jukebox'
require_relative '../lib/song'
 
#use this song data for your tests
songs = [

davidbella

# # Binary Secret Handshake

# > There are 10 types of people in the world: Those who understand binary, and those who don't.

# You and your fellow flatirons are of those in the "know" when it comes to binary decide to come up with a secret "handshake".

# ```
# 1 = wink
# 10 = double blink
# 100 = close your eyes