Exe Curia sequielo

Dynamically Add Critical CSS to Your Rails App

Optimizing the delivery of CSS is one way to improve user experience, load speed and SEO of your web app. This involves determining the "critical path CSS" and embeding it into the html of your page. The rest of the CSS for the site is loaded asynchronously so it does not block the rendering of your "above the fold" content. This Gist will show you how to dynamically generate critical path CSS for your Rails app.

In this example we will use the mudbugmedia/critical-path-css gem.

Prerequisites

You will need to set up caching and Active Job in your Rails app. I recommend using a thread-safe background job manager like resque.

The Best 18650 Batteries (last update: 2016-12-08)

This is similar to best18650battery.com but much simpler and better updated. These are the absolute top 18650s.

Name	Model	Capacity	Discharge	Fasttech links	Note
Sony	[US18650VTC6][d-vtc6]	3120mAh	30A	[1pcs][vtc6-1], [2-pack][vtc6-2], [4-pack][vtc6-4]
LG Chem	[INR18650MJ1][d-mj1]	3500mAh	10A	[1pcs][mj1-1], [2-pack][mj1-2], [4-pack][mj1-4]
Sanyo (Panasonic)	[NCR18650GA][d-ga]	3500mAh*	10A	[1pcs][ga-1], [2-pack][ga-2], [4-pack][ga-4]	NCR**
Samsung SDI	[INR18650-35E][d-35e]	>3350mAh	8A	[1pcs][

Here is the best setup (I think so :D) for K-series Keychron keyboards on Linux.

Note: many newer Keychron keyboards use QMK as firmware and most tips here do not apply to them. Maybe the ones related to Bluetooth can be useful, but everything related to Apple's keyboard module (hid_apple) on Linux, won't work. As far as I know, all QMK-based boards use the hid_generic module instead. Examples of QMK-based boards are: Q, Q-Pro, V, K-Pro, etc.

Most of these commands have been tested on Ubuntu 20.04 and should also work on most Debian-based distributions. If a command happens not to work for you, take a look in the comment section.

Make Fn + F-keys work (NOT FOR QMK-BASED BOARDS)

Older Keychron keyboards (those not based on QMK) use the hid_apple driver on Linux, even in the Windows/Android mode, both in Bluetooth and Wired modes.

Here are some examples on how to use Telegram bot api via CURL

Prerequisites

For getting messages in private chat with bot

Create a bot using @BotFather, get it's token
Start conversation with bot
Run following curl command

curl https://api.telegram.org/bot/getUpdates | grep -Po '"from":{"id":.+?,'

	# Use this script to test that your Telegram bot works.
	#
	# Install the dependency
	#
	# $ gem install telegram_bot
	#
	# Run the bot
	#
	# $ ruby bot.rb
	#


	commands:
	halt_if_cache_exists:
	description: Halt a build if a cache already exists, without downloading the entire cache. Match only exact key. Pair with mark_cache_existence.
	parameters:
	category:
	description: friendly name of the sort of cache (e.g. bundle, src)
	type: string
	key:
	description: hash key where underlying data would be stored