jaynetics

# This is a copy of the tabs component from AA 4.0.0.beta15. It might break in the future.
# Maybe an alternative will emerge in https://github.com/activeadmin/activeadmin/pull/8762
# The class name does not matter. Put this in an initializer, or in app/lib & require manually.
class ActiveAdminTabs < ActiveAdmin::Component
  builder_method :tabs

  def tab(title, options = {}, &block)
    title = title.to_s.titleize if title.is_a? Symbol
    @menu << build_menu_item(title, options, &block)
    @tabs_content << build_content_item(title, options, &block)

jaynetics

#!/usr/bin/env ruby

# usage: script.rb <video_id> <api_key>

require 'json'
require 'net/http'

video_id = ARGV[0].tap { |s| s&.length&.<(13) || fail('pass video id as first argument') }
key      = ARGV[1].tap { |s| s&.length&.>(13) || fail('pass api key as second argument') }
url      = "https://youtube.googleapis.com/youtube/v3/commentThreads?part=snippet&videoId=#{video_id}&key=#{key}"

jaynetics

RSpec::Matchers.define :access_db do
  match do |actual|
    # track db access via ActiveRecord instrumentation
    sql_callback = ->(*, event) do
      # ignore automatic schema queries and transactions, though
      @db_event = event unless event[:sql] =~ / a\.|max_ident|SAVEPOINT/
    end

    ActiveSupport::Notifications.subscribed(sql_callback, 'sql.active_record') do
      actual.call

jaynetics

require 'regexp_parser'

map = Regexp::Syntax.specified_versions.to_h do |ver|
  [ver, Regexp::Syntax.const_get(ver).added_features[:property].to_a]
end
Regexp::Syntax::CURRENT.features[:property].to_h do |prop|
  [prop, map.keys.find { |v| map[v]additions.include?(prop) }]
end

jaynetics

Struct2 = Class.new(Struct)
Struct2.singleton_class.prepend Module.new {
  def new(...)
    st = super
    st.instance_eval <<~RUBY
      alias __orig_new__ new

      ARG_NOT_GIVEN = Object.new.freeze

      def new(#{st.members[0]} = ARG_NOT_GIVEN, *, **)

jaynetics

######
# Simplest case - one method that does nothing, with and without TP
######

require 'benchmark/ips'

def noop; end

Benchmark.ips { |x| x.report('basic', 'noop') }; 1

jaynetics

code = Dir['{app,config,lib}/**/*.{rb,slim,erb,rake}'].map { File.read _1 }.join; 1
defs = code.scan(/(?:class|module) \K[A-Z][\w:]+(?=\n)/); 1
refs = code.scan(/(?<!class |module )\b#{Regexp.union(defs + defs.map { |d| d.split('::').last })}\b/); 1
unused = defs.uniq.sort.select { |d| refs.count(d) == 0 && refs.count(d.split('::').last) == 0 }

jaynetics

# results on ruby 3.2:
#
# Warming up --------------------------------------
#                  new   277.194k i/100ms
#                  dup   394.839k i/100ms
# Calculating -------------------------------------
#                  new      2.754M (± 1.9%) i/s -     13.860M in   5.034959s
#                  dup      4.006M (± 0.8%) i/s -     20.137M in   5.026561s
# 
# Comparison:

jaynetics

# results on Ruby 3.2:
#
# Warming up --------------------------------------
#                 hash     1.910M i/100ms
#                 case     1.297M i/100ms
# Calculating -------------------------------------
#                 hash     19.029M (± 1.5%) i/s -     95.507M in   5.020123s
#                 case     12.604M (± 0.4%) i/s -     63.534M in   5.040776s
#
# Comparison:

jaynetics

# This allows doing
#
#     Foo.prepend(WeakRefRegistry)
#
#     foo = Foo.new              # => #<Foo:0x1>
#     foo_id = foo.object_id     # => 1234
#     Foo.registry.fetch(foo_id) # => #<Foo:0x1>
#
# I.e. retrieve Foo instances by their object_id,
# without affecting garbage collection.