Stephen Margheim fractaledmind

One of the many reasons I love working with Ruby is it has a rich vocabulary that allows you to accomplish your goals with a minimal amount of code. If there isn't a method that does exactly what you want, it's usually possible to build an elegant solution yourself.

Let's take the example of simulating the rolling of a die.

We can represent a die as an array of its faces.

die = [*?⚀..?⚅]
# => ["⚀", "⚁", "⚂", "⚃", "⚄", "⚅"]

Rails 7 new features. Before and After

Add ComparisonValidator
PostgreSQL generated columns
PostgreSQL custom enum types
Add tracking of belongs_to association
association_previously_changed? method
Add invert_where method
Add associated method
Add missing method
Active Record Encryption

Descriptive messages with basic asserts

What if I told you that it's possible to get helpful failure messages from basic asserts using idiomatic equality == checks? No DSLs in sight.

This is a proof of concept to demonstrate that it's possible... mostly to satisfy my own curiosity. The concepts here could theoretically be expanded to provide a useful extension to existing testing frameworks or perhaps lay a foundation for an entirely new one.

This experiment created with Ruby 3.0.1. Note to self: There's probably a way to do this with TracePoint instead of monkey patching but I couldn't figure out how to get a reference to the passed variable being compared.

	# Rails production setup via SQLite3 made durable by https://litestream.io/
	# Copy this to Dockerfile on a fresh rails app. Deploy to fly.io or any other container engine.
	#
	# try locally: docker build . -t rails && docker run -p3000:3000 -it rails
	#
	# in production you might want to map /data to somewhere on the host,
	# but you don't have to!
	#
	FROM ruby:3.0.2

	FROM ruby:3.0-alpine

	RUN apk add --no-cache --update \
	ack \
	bash \
	build-base \
	curl \
	git \
	htop \
	less \

	class ApplicationController < ActionController::Base
	include CableReady::Broadcaster
	include Toastable
	end

	import { Controller } from "stimulus"
	import SlimSelect from "slim-select"
	import "slim-select/dist/slimselect.min.css"
	import "../style/slimselect-customized.css"

	export default class extends Controller {
	connect() {
	const limit = this.data.get("limit")
	const placeholder = this.data.get("placeholder")
	const searchText = this.data.get("no-results")

	function switch_pg {
	local version_to_run=$1
	local currently_running_version=$(psql --no-psqlrc -t -c 'show server_version;' postgres \| xargs)

	# check if you're erroneously switching to the same version
	if [ "$version_to_run" = "$currently_running_version" ]; then
	echo "Postgres $version_to_run is already running."
	return 1
	fi

	name: CI

	on: [push]

	jobs:
	test:
	runs-on: ubuntu-latest

	services:
	postgres:

	require 'date'

	class Sorter
	def initialize(*instructions)
	@defaults = {
	direction: :ascending,
	nils: :small,
	accessor: :itself,
	case_sensitive: true,
	normalized: false,

Stephen Margheim fractaledmind

Rails 7 new features. Before and After

Descriptive messages with basic asserts

Examples: