thatrubylove

#!ruby
  # config/initializers/mysql_utf8mb4_fix.rb
  require 'active_record/connection_adapters/abstract_mysql_adapter'

  module ActiveRecord
    module EmojiConnectionAdapters
      refine AbstractMysqlAdapter do
        NATIVE_DATABASE_TYPES[:string] = { name: "varchar", limit: 191 }
      end
    end

thatrubylove

1. Controller actions will not expose more than one instance variable
2. Views are used in the context of a controller, they use instance variables
3. Partials are meant to be sharable (multi controllers) so they should only use local variables

thatrubylove

h = { a: nil, b: :c, c: nil }

result = h.keys.reduce([]) do |acc, k|
  if h[k].nil?
    acc << k unless acc.include? k
  else
    acc << h[k]
    acc << k
  end
  acc

thatrubylove

class Person
  with_options if: :registration_complete? do |opts|
    validates :zipcode, presence: true
    validates :address1, presence:true
  end
end

thatrubylove

module KeywordAnalyzer
  extend self

  def analyze(comments, positive_words, negative_words)
    positives = scan_all(comments, positive_words)
    negatives = scan_all(comments, negative_words)

    {
      positive: {
        matches: positives,

thatrubylove

ids = Location.all.pluck(:id)
inserts = ids.map do |id|
  ActiveRecord::Base.send(:sanitize_sql_array,
                          ["insert into survey_requests (location_id) VALUES (?)", id])
end
ActiveRecord::Base.connection.execute(inserts.join(";"))

thatrubylove

<entry>
    <title>Papa John's</title>
    <link rel="logo" type="image/jpg" href="https://print.entertainment.com/medias/sys_master/celum_assets/a2c/ebc/48c/0ac/8820935426078_C0000000000000D5.png" />
    <category term="P" label="AlphabetIndex" scheme="http://api.entertainment.com/AtomServer3/feeds/offers?uuid=1401914342909&amp;location=75632&amp;distance=25&amp;category=25&amp;category=146" />
    <category term="Dining" label="Category" scheme="http://api.entertainment.com/AtomServer3/feeds/offers?uuid=1401914342909&amp;location=75632&amp;distance=25&amp;category=25&amp;category=25" />
    <category term="Fast Food" label="SubCategory" scheme="http://api.entertainment.com/AtomServer3/feeds/offers?uuid=1401914342909&amp;location=75632&amp;distance=25&amp;category=25&amp;category=38" />
    <category term="Premium" label="OfferType" scheme="http://api.entertainment.com/AtomServer3/feeds/offers?uuid=1401914342909&amp;location=75632&amp;distance=25&amp;category=25&amp;category=470" />
    <author>
      <name>

thatrubylove

class SomeController < ApplicationController
  put '/objects/:id' do |id|
    object = Objectify.null_object(Object.find_by_id, id) #partial application method!
    status object.status
    object.update_attributes(params[:object])
    json(object, errors: object.errors)
  end
end

class SentinelObject

thatrubylove

NUMBER_TO_GUESS = ARGV[0].to_i
BOUNDS = [1,1_000_000]

puts "The number to guess is #{NUMBER_TO_GUESS}"

module NumberGuesser
  extend self
  def guess(n1,n2)
    (n1+n2)/2
  end

thatrubylove

person.favorite_color = :green
person.save(some_database_save_ability)