Alexandre Angelim angelim

YARD CHEATSHEET http://yardoc.org

May 2020 - updated fork: https://gist.github.com/phansch/db18a595d2f5f1ef16646af72fe1fb0e

cribbed from http://pastebin.com/xgzeAmBn

Templates to remind you of the options and formatting for the different types of objects you might want to document using YARD.

Modules

Capybara Actions

# Anchor
click_link 'Save'

# Button
click_button 'awesome'

# Both above

My largest Sidekiq application had a memory leak and I was able to find and fix it in just few hours spent on analyzing Ruby's heap. In this post I'll show my profiling setup.

As you might know Ruby 2.1 introduced a few great changes to ObjectSpace, so now it's much easier to find a line of code that is allocating too many objects. Here is great post explaining how it's working.

I was too lazy to set up some seeding and run it locally, so I checked that test suite passes when profiling is enabled and pushed debugging to production. Production environment also suited me better since my jobs data can't be fully random generated.

So, in order to profile your worker, add this to your Sidekiq configuration:

if ENV["PROFILE"]

Multiple MySQL Versions for Development

Options included below:

Using Docker docker-compose
Using Homebrew brew

Using Docker (recommended)

This gist was originally created for Homebrew before the rise of Docker, yet it may be best to avoid installing mysql via brew any longer. Instead consider adding a barebones docker-compose.yml for each project and run docker-compose up to start each project's mysql service.

Webpack in Rails

All code is available in example app - https://github.com/maxivak/webpacker-rails-example-app

	# MySQL. Versions 4.1 and 5.0 are recommended.
	#
	# Install the MySQL driver:
	# gem install mysql2
	#
	# And be sure to use new-style password hashing:
	# http://dev.mysql.com/doc/refman/5.0/en/old-client.html
	development:
	adapter: mysql2
	encoding: utf8

	module CarrierWave
	module MiniMagick
	def toaster_filter
	manipulate! do \|img\|
	img.modulate '150,80,100'
	img.gamma 1.1
	img.contrast
	img.contrast
	img.contrast
	img.contrast

	class CorsMiddleware
	def initialize(app)
	@app = app
	end

	def call(env)
	default_headers = {
	'Access-Control-Allow-Origin' => '*',
	'Access-Control-Allow-Methods' => 'GET, POST, DELETE, PUT, PATCH, OPTIONS',
	'Access-Control-Allow-Headers' => 'Content-Type, api_key, Authorization, origin'