Sébastien Puyet spuyet

#!/bin/ruby --verion => 2.0.0-p353

Self

In Ruby, self is a special variable that always references the current object.

Inside class or module definition, self refer to the Class or Module object.
Inside instance method, self refer to future instance object.
Inside class method, self refer to the class.i

This list is based on aliases_spec.rb.

You can see also Module: RSpec::Matchers API.

matcher	aliased to	description
a_truthy_value	be_truthy	a truthy value
a_falsey_value	be_falsey	a falsey value
be_falsy	be_falsey	be falsy
a_falsy_value	be_falsey	a falsy value

HTTP Streaming (or Chunked vs Store & Forward)

The standard way of understanding the HTTP protocol is via the request reply pattern. Each HTTP transaction consists of a finitely bounded HTTP request and a finitely bounded HTTP response.

However it's also possible for both parts of an HTTP 1.1 transaction to stream their possibly infinitely bounded data. The advantages is that the sender can send data that is beyond the sender's memory limit, and the receiver can act on

Improved YARD CHEATSHEET http://yardoc.org

forked from https://gist.github.com/chetan/1827484 which is from early 2012 and contains outdated information.

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

	-- show running queries (pre 9.2)
	SELECT procpid, age(clock_timestamp(), query_start), usename, current_query
	FROM pg_stat_activity
	WHERE current_query != '<IDLE>' AND current_query NOT ILIKE '%pg_stat_activity%'
	ORDER BY query_start desc;

	-- show running queries (9.2)
	SELECT pid, age(clock_timestamp(), query_start), usename, query
	FROM pg_stat_activity
	WHERE query != '<IDLE>' AND query NOT ILIKE '%pg_stat_activity%'

	# -- encoding : utf-8 --
	class Domain < ActiveRecord::Base

	after_save :reload_routes

	def reload_routes
	if self.domain_changed?
	REDIS.set("rails_routes_ts", "expired")
	end
	end

	continue
	dir=/var/www/downloads
	file-allocation=falloc
	max-connection-per-server=4
	max-concurrent-downloads=2
	max-overall-download-limit=0
	min-split-size=25M
	rpc-allow-origin-all=true
	rpc-secret=YouShouldChangeThis
	input-file=/var/tmp/aria2c.session

	module ArelHelpers
	extend self

	def self.included(base)
	base.extend self
	end

	def asterisk(arel_table_or_model)
	arel_table, columns = case arel_table_or_model
	when Arel::Table

	http://stackoverflow.com/questions/22667401/postgres-json-data-type-rails-query
	http://stackoverflow.com/questions/40702813/query-on-postgres-json-array-field-in-rails

	#payload: [{"kind"=>"person"}]
	Segment.where("payload @> ?", [{kind: "person"}].to_json)

	#data: {"interest"=>["music", "movies", "programming"]}
	Segment.where("data @> ?", {"interest": ["music", "movies", "programming"]}.to_json)
	Segment.where("data #>> '{interest, 1}' = 'movies' ")
	Segment.where("jsonb_array_length(data->'interest') > 1")

	// first run:
	// yarn add glob-all purgecss-webpack-plugin --dev

	/*
	config/webpack/environment.js
	PurgeCSS configuration for Rails 5 + Webpacker + Tailwind CSS + Vue.js

	Optionally, put this in production.js if you only want this to apply to production.
	For example, your app is large and you want to optimize dev compilation speed.
	*/