joakimk

# I have not deeply researched the best way of doing this. This is just one way.
# Made this gist because there was no google result for this exact question so I had to dive into the code instead.

# Saving
cookies = browser.driver.cookies.instance_variable_get(:@browser).get_raw_cookies.map { |c| c.instance_variable_get(:@attributes) }
cookies_json = cookies.to_json

# Restoring
cookies = JSON.parse(cookies_json)
cookies.each do |c| 

joakimk

Building custom ruby-alpine

Check the alpine version of the previous image.

alpine3.9 master$ docker run -it ruby:2.5.4-alpine sh
/ # cat /etc/alpine-release 
3.9.2
/ # ruby -v
ruby 2.5.4p155 (2019-03-13 revision 67245) [x86_64-linux-musl]

joakimk

# Atom -> Init Script...

child = require "child_process"

runTestInTmux = (focus) ->
  editor = atom.workspace.getActiveTextEditor()
  editor.save()

  fullPath = editor.getPath()
  projectPath = atom.project.getDirectories()[0].getPath() + "/"

joakimk

Background

We started out with two apps.

• foo-staging
• foo-production

Our CI would run tests, then deploy to staging, run smoke tests and then run to production and run smoke tests.

This took about 22-25 min.

joakimk

// Didn't find anything on google for this so I wrote my own. Use as a starting point if you have a similar problem.
// Please write comments if there is a better way to do this (or solve the same problem in another way) in webpack.

// Contents of config/webpack/environment.js:

const { environment } = require('@rails/webpacker')

// Generate undigested assets for use in embedded javascript, emails, etc.
// We previously used non-stupid-digest-assets for this.

joakimk

Some notes on my Elm development environment.

The most important thing is elm-format. It auto-formats the code when you save. You will likely miss this in other languages.

0. brew install elm elm-format
1. Install Atom
2. Elm plugins: elm-format language-elm
3. Vim plugins: ex-mode vim-mode-plus

Currently evaluating the elmjutsu plugin.

joakimk

/* jshint asi:true */
// PixiJS v4 example (WebGL rendering)

model = loadStateOrDefaultTo({
    move: 1
})

tick = (delta) => {
    if(codeHasChanged()) { return }
    

joakimk

Instant-feeling unit tests improves productivity and developer happiness :)

Elixir tooling isn't quite there the way Ruby can be when optimized.

Ruby benchmarks:

• instant 46ms base time (time ruby -e "")
• instant 190ms running a ruby unit test doing nothing
• in 50k line rails app:
• okay 640ms bundler (time bundle exec ruby -e "")

joakimk

Building a little list so I can more easily recommend the best talks and be able re-watch them myself.

Elm

• "Beyond Hello World and Todo Lists" by Ossi Hanhinen
  • Ossi shares practical experience of building several Elm apps.
• "The Clockwork Gardener: Growing an Elm App With Templates" by Jessica Kerr
  • Keeping maintainability of Elm while being able to do big sweeping changes like in a dynamic language.
• Q&A Panel (elm-conf 2016)
• Good and enteraining Q&A with many experienced Elm devs and Elm's creator.

joakimk

import UpdateList exposing (addOrUpdateById)

update msg model =
  case msg of
    NewOrUpdatedItem item ->
      ({model | items = model.items |> addOrUpdateById item}, Cmd.none)