Alessandro De Simone alexdesi

## gist:c35ca8da0d264b6a917ac62efa0aa969
Sometimes, this error occurs when I run a rails app on my local:

```
ActionView::Template::Error (Webpacker can't find media/images/...
1. You want to set webpacker.yml value of compile to true for your environment
   unless you are using the `webpack -w` or the webpack-dev-server.
2. webpack has not yet re-run to reflect updates.
3. You have misconfigured Webpacker's config/webpacker.yml file.
4. Your webpack configuration is not creating a manifest.
Your manifest contains:

## mini_state_machine.rb
# THIS IS WIP, NOT FULLY WORKING

class MiniStateMachine

  # [initial_statuses, event, next_status]
  @transitions = [
    [[:s1, :s2], :event1, :s3],
    [[:s3],      :event2, :s4],
    [[:s1, :s2], :event3, :s5]
  ]

## hash2csv
require 'date'
require 'csv'

def array_hash_to_csv(data, filename = "data.csv")
  CSV.open(filename, "wb") do |csv|
    csv << data.first.keys
    data.each do |hash|
      csv << hash.values
    end
  end

## ignore_cassettes
VCR.turned_off(:ignore_cassettes => true) do
  VCR.use_cassette('cassette') do
    ...
  end
end

## list_asset_files.rb
# Found in http://stackoverflow.com/questions/10994396/sprockets-rails-find-all-files-sprockets-knows-how-to-compile
Rails.application.assets.each_file { |pathname| puts pathname}

## gist:3793141
user.attributes = { ... }
user.save_without_session_maintenance

## gist:3656399
h = {:a => 1, :b => 2 }
h[:c] = row.delete(:a).last

>> put h
>> {:c => 1, :b => 2 }

## gist:3452770
require 'factory_girl'
FactoryGirl.find_definitions

u = Factory.create(:user)

## run_one_migration
./script/runner 'require("./db/migrate/migration_name.rb").first.constantize.up'
	Sometimes, this error occurs when I run a rails app on my local:

	```
	ActionView::Template::Error (Webpacker can't find media/images/...
	1. You want to set webpacker.yml value of compile to true for your environment
	unless you are using the `webpack -w` or the webpack-dev-server.
	2. webpack has not yet re-run to reflect updates.
	3. You have misconfigured Webpacker's config/webpacker.yml file.
	4. Your webpack configuration is not creating a manifest.
	Your manifest contains:
	# THIS IS WIP, NOT FULLY WORKING

	class MiniStateMachine

	# [initial_statuses, event, next_status]
	@transitions = [
	[[:s1, :s2], :event1, :s3],
	[[:s3], :event2, :s4],
	[[:s1, :s2], :event3, :s5]
	]
	require 'date'
	require 'csv'

	def array_hash_to_csv(data, filename = "data.csv")
	CSV.open(filename, "wb") do \|csv\|
	csv << data.first.keys
	data.each do \|hash\|
	csv << hash.values
	end
	end
	VCR.turned_off(:ignore_cassettes => true) do
	VCR.use_cassette('cassette') do
	...
	end
	end
	# Found in http://stackoverflow.com/questions/10994396/sprockets-rails-find-all-files-sprockets-knows-how-to-compile
	Rails.application.assets.each_file { \|pathname\| puts pathname}
	user.attributes = { ... }
	user.save_without_session_maintenance
	h = {:a => 1, :b => 2 }
	h[:c] = row.delete(:a).last

	>> put h
	>> {:c => 1, :b => 2 }
	require 'factory_girl'
	FactoryGirl.find_definitions

	u = Factory.create(:user)