Armando Fox armandofox

## gist:a40354fe0c82701304af0513a6822785
function parse_git_branch {
  git branch --no-color 2> /dev/null | sed -e '/^[^*]/d' -e 's/* \(.*\)/\1/'
}
export PS1="\[\033[1;34m\]\w[\$(parse_git_branch)]$\[\033[0m\] "

## application.html.erb
<!DOCTYPE html>
<html>
  <head>
    <title> RottenPotatoes! </title>
    <link rel="stylesheet" href="https://getbootstrap.com/docs/4.0/dist/css/bootstrap.min.css">
    <%= javascript_include_tag :application %>
    <%= csrf_meta_tags %>
  </head>
  <body>
    <div class="container">

## association1.rb
# it would be nice if we could do this:
inception = Movie.where(:title => 'Inception')
alice,bob = Moviegoer.find(alice_id, bob_id)
# alice likes Inception, bob less so
alice_review = Review.new(:potatoes => 4)
bob_review   = Review.new(:potatoes => 3)
# a movie has many reviews:
inception.reviews = [alice_review, bob_review]
# a moviegoer has many reviews:
alice.reviews << alice_review

## application.html.erb
<!DOCTYPE html>
<html>
  <head>
    <title> RottenPotatoes! </title>
    <link rel="stylesheet" href="https://getbootstrap.com/docs/4.0/dist/css/bootstrap.min.css">
    <%= javascript_include_tag :application %>
    <%= csrf_meta_tags %>
  </head>
  <body>
    <div class="container">

## association1.rb
# it would be nice if we could do this:
inception = Movie.where(:title => 'Inception')
alice,bob = Moviegoer.find(alice_id, bob_id)
# alice likes Inception, bob less so
alice_review = Review.new(:potatoes => 4)
bob_review   = Review.new(:potatoes => 3)
# a movie has many reviews:
inception.reviews = [alice_review, bob_review]
# a moviegoer has many reviews:
alice.reviews << alice_review

## topmovies.rb
class MoviesController < ApplicationController
  def index
    @movies = Movie.all
    @top_5 = Movie.joins(:reviews).group('movie_id').
      order("AVG(potatoes) DESC").limit(5)
  end
end

## topmovies.html.erb
<!-- a cacheable partial for top movies -->
<%- cache('top_moviegoers') do %>
  <ul id="topmovies">
    <%- @top_5.each do |movie|  %>
    <li> <%= movie.name %>  </li>
    <% end %>
  </ul>
<% end %>

## srp_example.rb
class Moviegoer
  attr_accessor :name, :street, :phone_number, :zipcode
  validates :phone_number, # ...
  validates :zipcode, # ...
  def format_phone_number ; ... ; end
  def check_zipcode ; ... ; end
  def format_address(street, phone_number, zipcode) # data clump
    # do formatting, calling format_phone_number and check_zipcode
  end
end

## null_object_fix.rb
class Config
  def self.emailer
    if email_disabled? then NullMailer else
      if has_amiko? then Amiko else MailerMonkey end
    end
  end
end
class NullMailer
  def initialize ; end
  def send_email_to(*args) ; true ; end

## lsp_square_rect_fix.rb
# LSP-compliant solution: replace inheritance with delegation
# Ruby's duck typing still lets you use a square in most places where
#  rectangle would be used - but no longer a subclass in LSP sense.
class Square
  attr_accessor :rect
  def initialize(side, top_left)
    @rect = Rectangle.new(side, side, top_left)
  end
  def area      ; rect.area      ; end
  def perimeter ; rect.perimeter ; end
	function parse_git_branch {
	git branch --no-color 2> /dev/null \| sed -e '/^[^]/d' -e 's/ \(.*\)/\1/'
	}
	export PS1="\[\033[1;34m\]\w[\$(parse_git_branch)]$\[\033[0m\] "
	<!DOCTYPE html>
	<html>
	<head>
	<title> RottenPotatoes! </title>
	<link rel="stylesheet" href="https://getbootstrap.com/docs/4.0/dist/css/bootstrap.min.css">
	<%= javascript_include_tag :application %>
	<%= csrf_meta_tags %>
	</head>
	<body>
	<div class="container">
	# it would be nice if we could do this:
	inception = Movie.where(:title => 'Inception')
	alice,bob = Moviegoer.find(alice_id, bob_id)
	# alice likes Inception, bob less so
	alice_review = Review.new(:potatoes => 4)
	bob_review = Review.new(:potatoes => 3)
	# a movie has many reviews:
	inception.reviews = [alice_review, bob_review]
	# a moviegoer has many reviews:
	alice.reviews << alice_review
	class MoviesController < ApplicationController
	def index
	@movies = Movie.all
	@top_5 = Movie.joins(:reviews).group('movie_id').
	order("AVG(potatoes) DESC").limit(5)
	end
	end
	<!-- a cacheable partial for top movies -->
	<%- cache('top_moviegoers') do %>
	<ul id="topmovies">
	<%- @top_5.each do \|movie\| %>
	<li> <%= movie.name %> </li>
	<% end %>
	</ul>
	<% end %>
	class Moviegoer
	attr_accessor :name, :street, :phone_number, :zipcode
	validates :phone_number, # ...
	validates :zipcode, # ...
	def format_phone_number ; ... ; end
	def check_zipcode ; ... ; end
	def format_address(street, phone_number, zipcode) # data clump
	# do formatting, calling format_phone_number and check_zipcode
	end
	end
	class Config
	def self.emailer
	if email_disabled? then NullMailer else
	if has_amiko? then Amiko else MailerMonkey end
	end
	end
	end
	class NullMailer
	def initialize ; end
	def send_email_to(*args) ; true ; end
	# LSP-compliant solution: replace inheritance with delegation
	# Ruby's duck typing still lets you use a square in most places where
	# rectangle would be used - but no longer a subclass in LSP sense.
	class Square
	attr_accessor :rect
	def initialize(side, top_left)
	@rect = Rectangle.new(side, side, top_left)
	end
	def area ; rect.area ; end
	def perimeter ; rect.perimeter ; end