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fuzzy logic

Josh Goodall inopinatus

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fuzzy logic
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@inopinatus
inopinatus / castaway.rb
Created Apr 23, 2021
dangerous polymorphic fun with primary key casts (nsfw)
View castaway.rb
class CastIdsToText < ActiveRecord::Migration[6.0]
def up
add_cast :text, :uuid, function: :inout, context: :implicit
add_cast :text, :bigint, function: :inout, context: :implicit
end
def down
remove_cast :text, :uuid
remove_cast :text, :bigint
end
@inopinatus
inopinatus / bouquet-controller.js
Created Jan 8, 2021
Proof-of-concept, using a Stimulus wrapper for IntersectionObserver to drive Turbo lazy-loading via click events, with graceful fallback to plain HTML.
View bouquet-controller.js
import { Controller } from "stimulus"
// Proof of concept for lazy loaded turbo frames
export default class extends Controller {
static targets = ["click", "events", "root"]
static values = {
rootMargin: String,
threshold: Number,
appearEvent: String,
disappearEvent: String
@inopinatus
inopinatus / worry.rb
Last active Jan 8, 2021
Abusing pattern matching as a proc factory and subsequent invocation
View worry.rb
# frozen_string_literal: true
require 'json'
module Proxy
refine Object do
def deconstruct_keys(methods)
methods.to_h { |m| [m, ->(*a) { throw m, public_send(m, *a) }] }
end
end
end
@inopinatus
inopinatus / route-authenticators.rb
Created Dec 22, 2020
Injecting route-specific dependencies to avoid controller duplication.
View route-authenticators.rb
# config/routes.rb
defaults authenticator: UserAuthenticator do
resources :todos
end
scope :api, defaults: { authenticator: APIAuthenticator, format: :json } do
resources :todos
end
# app/lib/user_authenticator.rb
@inopinatus
inopinatus / organisation.rb
Created Dec 14, 2020
Value object that replaced an enum
View organisation.rb
# app/models/organisation.rb
# schema like:
#
# create_table "organisations", id: :uuid, default: -> { "public.gen_random_uuid()" }, force: :cascade do |t|
# t.string "transponder", default: "my_laps", null: false
#
class Organisation < ApplicationRecord
attribute :transponder, TransponderType.new
@inopinatus
inopinatus / uu58.rb
Last active Jan 18, 2021
Convert UUIDs to/from base58
View uu58.rb
module Uu58
# Convert a string UUID to a base58 string representation.
#
# Output will be padded up to 22 digits if necessary.
#
# Behaviour is undefined if passing something other than a 128-bit
# hex string in network order with optional interstitial hyphens.
def self.uuid_to_base58(uuid, alphabet = SecureRandom::BASE58_ALPHABET)
ary = uuid.delete("-").to_i(16).digits(58).reverse
ary.unshift(0) while ary.length < 22
@inopinatus
inopinatus / application_record.rb
Created Oct 14, 2020
values_at for active record models
View application_record.rb
class ApplicationRecord < ActiveRecord::Base
self.abstract_class = true
unless instance_methods.include?(:values_at)
def values_at(*methods)
methods.flatten.map! { |method| public_send(method) }
end
end
end
@inopinatus
inopinatus / latest_association_by_distinct_on.rb
Last active Sep 19, 2020
preloading the latest of an associated collection
View latest_association_by_distinct_on.rb
class Post
has_many :comments
has_one :latest_comment, -> { latest_by :post_id }, class_name: 'Comment'
class Comment
scope :latest_by, -> column {
from(
order(column, created_at: :desc).arel
.distinct_on(arel_table[column])
.as(quoted_table_name))
@inopinatus
inopinatus / matches_any.rb
Created Sep 16, 2020
programmatic LIKE in Arel
View matches_any.rb
scope :search_uid, ->(*terms) {
where(arel_attribute(:uid).matches_any(terms.map {|term| "%#{sanitize_sql_like term}%" }, nil, true))
}
@inopinatus
inopinatus / callback_registration_tracing.rb
Created Sep 14, 2020
initializer for determining where callbacks were registered
View callback_registration_tracing.rb
# frozen_string_literal: true
module CallbackRegistrationTracing
module Capture
def normalize_callback_params(*args)
super.tap do |_, _, options|
options[:_caller] = caller(3)
end
end
end