dhh

# CLI
sudo apt update -y
sudo apt install -y \
	git curl \
	docker.io docker-buildx \
	build-essential pkg-config autoconf bison rustc cargo clang \
	libssl-dev libreadline-dev zlib1g-dev libyaml-dev libreadline-dev libncurses5-dev libffi-dev libgdbm-dev libjemalloc2 \
	libvips imagemagick libmagickwand-dev mupdf mupdf-tools \
	redis-tools sqlite3 libsqlite3-0 libmysqlclient-dev \
	rbenv apache2-utils

hopsoft

# ActiveJob natively captures constructor arguments in an `@arguments` instance variable
# which is also exposed as an `arguments` property on each job instance.
#
# Calls to `perform_now` and `perform_later` both forward arguments to the constructor.
#
# For example, all of these invocation styles work.
#
#   result = DoStuffJob.new("foobar").perform # sync
#   result = DoStuffJob.new.perform("foobar") # sync
#   result = DoStuffJob.perform_now("foobar") # sync

Myndex

Let's Flip For Color

Q: I want my text color to switch to black or white, depending on the background color the user chooses. Just where is that flip point?

Short Answer:

Calculate the luminance (Y) of the given color, and flip the text either black or white based on a pre-determined middle contrast figure. For a typical sRGB display, flip to white when Y < 0.36 (i.e. 36%)

Longer Answer

First I want to acknowledge the massive amount of misinformation on the internet on this particular subject. The fact this field is still a subject of active research and unsettled science adds to the fun. I came to this conclusion as the result of the last few years of research into a new contrast prediction method for readability.

The field of visual perception is dense and abstract, as well as developing, so it is common for misunderstandings to exist. For instance, HSV and HSL are not even close to perceptually accurate. For that you need a perceptually uniform model such as CIELAB or CIELUV or CIECAM02 etc

KonnorRogers

# frozen_string_literal: true

class Users::SessionsController < Devise::SessionsController
  # before_action :configure_sign_in_params, only: [:create]

  # GET /resource/sign_in
  # def new
  #   super
  # end

dhh

ruby '2.7.1'

gem 'rails', github: 'rails/rails'
gem 'tzinfo-data', '>= 1.2016.7'  # Don't rely on OSX/Linux timezone data

# Action Text
gem 'actiontext', github: 'basecamp/actiontext', ref: 'okra'
gem 'okra', github: 'basecamp/okra'

# Drivers

karlhorky

CSS is Complex. We can do better.

Posted on https://twitter.com/karlhorky/status/1082622697325166592

Ok, thread time.

CSS is unnecessarily complex. And we can do better.

There have been side conversations here and there, but I want to consolidate the information and opinions here. This will be a running thread, and I'll add to it as new things crop up.

searls

I learned a little bit about building queries (even with Rails/ARel) of postgres JSONB columns in my side project that I wanted to share.

I have a model that represents a Japanese word:

{"id"=>4111,
 "type"=>"vocabulary",
 "characters"=>"洗う",
 "meanings"=>[{
    "meaning"=>"To Wash", 

searls

Fix absolutely positioned divs when people turn their phones sideways

The problem

In Safari, if you have a layout container that's absolutely positioned to take up, at a minimum, its whole container (which isn't unheard of in "appey" internet home page thingies) using CSS like this:

.absolutely

paceaux

Tiny rules for how to name stuff

CSS

How to name CSS classes

Stateful Class names

Is it a state that is only one of two conditions? (i.e. a boolean)

ageis

security and hardening options for systemd service units

A common and reliable pattern in service unit files is thus:

NoNewPrivileges=yes
PrivateTmp=yes
PrivateDevices=yes
DevicePolicy=closed
ProtectSystem=strict