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# app/utils/calculator.rb
class StatelessCalculator
  def self.add(x, y)
    x + y
  end

  # ...subtract, divide, multiply, etc.
end

# app/services/calculation_isolate.rb

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class RssImporter
  attr_writer :articles
  attr_reader :result
   
  def import
    @result = articles.map do |article|
      RssContent.create { url: article.url, text: article.body }
    end
  end
end

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# our first import
importer          = RssImporter.new
importer.articles = a_bunch_of_rss_content
importer.import
imported = importer.result

# second import, same instance of RssImporter
importer.articles = other_rss_content
importer.result # same value as "imported" on line 5

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class RssImporter
  def self.import(articles)
    articles.map do |article|
      RssContent.create { url: article.url, text: article.body }
    end
  end
end
 
# somewhere in your codebase...
imported = RssImporter.import a_bunch_of_rss_content

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# app/utils/calculator.rb
module StatelessCalculator
  def add(x, y)
    x + y
  end
  
  module_function :add
end

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class AssetService
  def prune_stale_images
    Prunable.from_assets(Image.all).each do |image|
      S3Object.delete image.s3_object_name, image.s3_bucket_name
      image.destroy
    end
  end
end

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class AssetService
  def prune_stale_images
    --hard_coded_return_value--.each do |image|
      S3Object.delete image.s3_object_name, image.s3_bucket_name
      image.destroy
    end
  end
end

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x = {
    createCheckbox: function (o) {
        var t = '';
        t += '<label class="checkbox {{class}}">';
        t += helpers.viewUtil.createBareCheckbox(o);
        t += '</label>';
        return Mustache.to_html(t, o);
    },
    createBareCheckbox: function (o) {

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# in some shared file
SomeNamespace.isZipInState = (zip, state) ->
  ranges = STATE_RANGES[state]
    return true if ! ranges? || ! zip
    zip = value.match(/^\D*(\d\D*){5}/)[0]
    zip = parseInt zip.replace(/\D/g,'') if zip
    return true if ! zip
    results = []
    for range in ranges
      do (range) ->

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require 'active_record'
require 'barrister'
require 'pry'
require 'redis'
require 'erb'

# App
require './models.rb'
require './service.rb'