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class Post
end

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class Tag
  def posts
    post_scope = ->(tag) { where '? = ANY (posts.tags)', tag.id }
    options = {}
    reflection = ActiveRecord::Reflection::HasManyReflection.new(:posts, post_scope, options, self.class)
    association = PostsAssociation.new(self, reflection)
    @posts ||= ActiveRecord::Associations::CollectionProxy.new(Post, association)
  end

  private

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var div = document.createElement('div')
div.innerHTML = "<script></script>"
var s = div.children[0]
s.src = "//connect.facebook.net/en_US/all.js#xfbml=1"

// true
s instanceof HTMLScriptElement

// Will NOT load the script
document.head.appendChild(s)

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    link_to meal_ingredients_path(meal) do |link|
      if meal.ingredients.need > 0
        "Liste d'épicerie — il vous manque #{meal.ingredients.need} ingrédients"
      else
        link[:class] << 'complete'
        "Vous avez tous les ingrédients!"
      end
    end

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where("logs.products ?| ARRAY[:ids]", ids: products.map(&:id).uniq.map(&:to_s))

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<!-- This work for a new contact, but will not for an existing contact -->
<%= form_for [contact.client, contact] do |f| %>
<% end %>

<!-- This work for an existing contact, but will not for a new contact -->
<%= form_for [contact] do |f| %>
<% end %>

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class FollowersController < ApplicationController
  before_action :authenticate!
  def index
    @pictures = current_user.followers.pictures
  end
end

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class Popup
  loaded: =>
    @on 'dates:index', @show

  show: (e) =>
    @scrollTop = document.body.scrollTop
    document.body.appendChild(e.HTML)
    main = document.body.querySelector('main')
    main.classList.add('overlayed')
    main.style.top = "-#{@scrollTop}px"

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e.HTML = "<%= j content_tag(:div, render('list', posts: @posts), class: %w(popup)) %>".toHTML()

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module ContentTagHelper
  def content_tag(*args)
    if block_given?
      tag = Tag.new(args[0], args[1] || {})
      old_buf = @output_buffer
      @output_buffer = ActionView::OutputBuffer.new
      value = yield(tag)
      content = tag.render(@output_buffer.presence || value)
      @output_buffer = old_buf
      content