Jerry Cheung jch

## rails-engines.md

      
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                jch
                / rails-engines.md
            
            
              Created
              December 19, 2013 01:36
            
              
                Rails Engines
              
          
    This is a quick brain dump of problems I've run into using Rails Engines.
Problems


Dependencies If an Engine requires a gem at version X, and the application requires the same gem at version Y. You could specify a lose version constraint on the Engine, but that's just asking for trouble. If the application updates to a newer version that the Engine isn't expecting, things go wrong.
Layouts/Assets To customize these, you need to overwrite certain magical paths. This ends up duplicating a lot of the engine and forces you to dig into the internals of how the Engine works rather than trusting it as a standalone component.
Models If you use an Engine's models, you're crossing into the Engine's abstractions again. It seems like a good place to share code, but it means your models will need to become versioned.
Complexity It's hard to debug problems when they come up. Is it coming from the engine, the app, or the app's overrides of the engine


## js-tools.md

      
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                jch
                / js-tools.md
            
            
              Last active
              December 21, 2015 06:19
            
          
    JavaScript Toolbox

This is a list of JavaScript libraries I like or would like to investigate. It will be kept short intentionally to be things I find useful for most JS projects.
Testing


Karma - test runner. adapters for testing libraries, runs within browser clients
Mocha - test library
Sinon.js - spies and stubs. Can create fake servers and responses.
QUnit - test library. like it's simplicity. Also likely to be maintained long-term because of jQuery. Will take off the list if I like Mocha.


## polling_request.coffee
# # PollingRequest
#
# A xhr request that repeatedly polls a [progress-aware endpoint](#progress-aware-endpoint).
#
#    req = PollingRequest.new
#      url: /states.csv
#      interval: 2000   # polling interval in milliseconds
#      progress: (n)->
#        console.log "Progress: #{n} percent"
#      success: (res)->

## geocoding-google.rb
require 'uri'
require 'multi_json'
require 'net/http'

# Simple client wrapper around Google Geocoding API V3
# https://developers.google.com/maps/documentation/geocoding
#
#    geo = Geocoding::Google.geocode('91106')
#    geo.state
#

## interview-your-libraries.md

      
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                jch
                / interview-your-libraries.md
            
            
              Last active
              December 17, 2015 02:48
            
          
    Interview your libraries

I love working with John Barnette, even if we don't work on the same stuff regularly. The other day, he wrote this in a discussion:

Every time we bring in an external library, we inherit its opinions, shortcomings, idioms, and taste. This isn't a reason to rewrite everything ourselves, but it's good for us to interview libraries like we interview new GitHubbers.

I loved this. In two short sentences, Barnette summed up why we should evaluate new dependencies before adding them to an existing project.
Why not drop in a library?


## pdf_document.rb
class PDFDocument
  include ActionDispatch::Integration::Runner  # lets you grab assets. See #session
  include Rails.application.routes.url_helpers

  # quote or invoice or receipt
  def initialize(document)
    @document = document
  end

  def pdf

## rack-pdf_preflight.rb
require 'base64'
require 'nokogiri'

module Rack
  # Rack middleware to inline css and images from underlying application so it
  # can be proccessed by PDFKit without additional network requests.
  #
  # For example, this middleware will transform this response:
  #
  #    <html>

## minitest-hooks.rb
require 'minitest/unit'

module MiniTest
  module Hooks
    class Runner < MiniTest::Unit
      def _run_suite(suite, type)
        # TODO: copy over ivars into the testcase instance binding
        suite._before_all_blocks.each(&:call)
        result = super
        suite._after_all_blocks.each(&:call)

## cal-github-talk.md

      
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                jch
                / cal-github-talk.md
            
            
              Last active
              December 16, 2015 02:00
            
          
    Introductions


jerry - enterprise developer
danish - enterprise sales

Overview


github overview

started as a side project to share and host code

grown much bigger. now the goal is to be a suite of collaboration tools. work better together


what version control is?


## prototype.rb
# Manage user email subscriptions and opt-outs.
module OptOut
  def config
    @config ||= Configuration.new
  end

  def configure(&blk)
    blk.call(config) if blk
    config
  end
	# # PollingRequest
	#
	# A xhr request that repeatedly polls a [progress-aware endpoint](#progress-aware-endpoint).
	#
	# req = PollingRequest.new
	# url: /states.csv
	# interval: 2000 # polling interval in milliseconds
	# progress: (n)->
	# console.log "Progress: #{n} percent"
	# success: (res)->
	require 'uri'
	require 'multi_json'
	require 'net/http'

	# Simple client wrapper around Google Geocoding API V3
	# https://developers.google.com/maps/documentation/geocoding
	#
	# geo = Geocoding::Google.geocode('91106')
	# geo.state
	#
	class PDFDocument
	include ActionDispatch::Integration::Runner # lets you grab assets. See #session
	include Rails.application.routes.url_helpers

	# quote or invoice or receipt
	def initialize(document)
	@document = document
	end

	def pdf
	require 'base64'
	require 'nokogiri'

	module Rack
	# Rack middleware to inline css and images from underlying application so it
	# can be proccessed by PDFKit without additional network requests.
	#
	# For example, this middleware will transform this response:
	#
	# <html>
	require 'minitest/unit'

	module MiniTest
	module Hooks
	class Runner < MiniTest::Unit
	def _run_suite(suite, type)
	# TODO: copy over ivars into the testcase instance binding
	suite._before_all_blocks.each(&:call)
	result = super
	suite._after_all_blocks.each(&:call)
	# Manage user email subscriptions and opt-outs.
	module OptOut
	def config
	@config \|\|= Configuration.new
	end

	def configure(&blk)
	blk.call(config) if blk
	config
	end