Schwad

# Enumerable's Detect
# - returns first element for which block returns true and then stops. If none returns nil.

(1..100).detect  { |i| i % 5 == 0 and i % 7 == 0 }   #=> 35

# Find All

(1..10).find_all { |i|  i % 3 == 0 }   #=> [3, 6, 9]

# Reject

Schwad

class AttributesApiExample < ApplicationRecord
  attribute :start_date, :date, default: -> { 1.day.from_now }
  attribute :end_date, :date, default: -> { 8.days.from_now }
  attribute :my_attribute, :my_type, default: -> { 'My Default Value' }
end

Schwad

class Current < ActiveSupport::CurrentAttributes
  attribute :account, :user
  attribute :request_id, :user_agent, :ip_address

  resets { Time.zone = nil }

  def user=(user)
    super
    self.account = user.account
    Time.zone    = user.time_zone

Schwad

# Sets up APPLICATION_NAME_HERE and deploys to Heroku. This should be run while on master

# NOTE: if you get a permission denied error, try running `chmod u+x bin/deploy` in the terminal

# Fails script if any commands fail
set -e

echo '== Installing dependencies =='

bundle install

Schwad

def blocks_double_render_error
  @books = Book.all
  render 'index' and return
  render 'show'
  @books.last.update_column(:title, 'Or am I?')
end

#=> Rendering books/index.html.haml within layouts/application
#=> Book.last.title
#=> "Surprise Surprise"

Schwad

def double_render_error
  @books = Book.all
  render 'index'
  render 'show'
end

#=> AbstractController::DoubleRenderError - Render and/or redirect were called multiple times in this action. Please note that you may only call render OR redirect, and at most once per action.

Schwad

def extra_curricular_activity
  @book = Book.find(params[:id])
  render 'show'
  @book.update_column(:title, 'Surprise Surprise')
end

#=> SQL (7.1ms)  UPDATE "books" SET "title" = 'Surprise Surprise' WHERE "books"."id" = $1  [["id", 1]]

Schwad

def show
  @book = Book.find(params[:id])
  render 'unexpected'
end

#=> Rendering books/unexpected.html.haml within layouts/application

Schwad

def index
  @books = Book.all
end

#=> Rendering books/index.html.haml within layouts/application

Schwad

class String
  
  def nostalgic_case
    upcase.chars.join(" ")
  end
  
end