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Ruby: The future of frozen string literals

What is a literal?

In programming languages, literals are textual representations of values in the source code. This is a syntactical concept.

Some examples:

7 # integer literal
@amkisko
amkisko / gist:9aa686ddd8ebff52397a54fe34d9a036
Last active May 14, 2024 16:02
Rails ActiveRecord and ActiveSupport callbacks wrapper for collecting metrics in pair with rspec
if ENV["DEBUG_CALLBACKS"]
Rails.application.eager_load!
ActiveRecord::Callbacks::CALLBACKS.each do |callback_type|
ApplicationRecord.descendants.each do |model|
kind, name = callback_type.to_s.split("_")
chain = model.__callbacks[name.to_sym]&.send(:chain)
filtered = chain&.select { |chain_callback| chain_callback.kind == kind.to_sym }
$callbacks_counter ||= {}
$callbacks_counter[model.name] ||= {}
@amkisko
amkisko / Gemfile
Last active July 4, 2024 10:41
ActiveAdmin v4 propshaft, importmap, stimulus, tailwindcss and ActionPolicy configuration
# NOTE: partial content required for Gemfile
gem "rails"
gem "propshaft"
gem "importmap-rails"
gem "stimulus-rails"
gem "tailwindcss-rails"
gem "action_policy"
@dhh
dhh / linux-setup.sh
Last active July 19, 2024 07:52
linux-setup.sh
# THIS LINUX SETUP SCRIPT HAS MORPHED INTO A WHOLE PROJECT: HTTPS://OMAKUB.ORG
# PLEASE CHECKOUT THAT PROJECT INSTEAD OF THIS OUTDATED SETUP SCRIPT.
#
#
# Libraries and infrastructure
sudo apt update -y
sudo apt install -y \
docker.io docker-buildx \
build-essential pkg-config autoconf bison rustc cargo clang \
@mitchellh
mitchellh / merge_vs_rebase_vs_squash.md
Last active July 4, 2024 13:50
Merge vs. Rebase vs. Squash

I get asked pretty regularly what my opinion is on merge commits vs rebasing vs squashing. I've typed up this response so many times that I've decided to just put it in a gist so I can reference it whenever it comes up again.

I use merge, squash, rebase all situationally. I believe they all have their merits but their usage depends on the context. I think anyone who says any particular strategy is the right answer 100% of the time is wrong, but I think there is considerable acceptable leeway in when you use each. What follows is my personal and professional opinion:

@amkisko
amkisko / sidekiq_alive.rb
Last active October 15, 2023 08:37
sidekiq_alive simple alternative implementation (gem sidekiq_status_monitor)
# PATH: config/initializers/sidekiq_alive.rb
# AUTHOR: Andrei Makarov (github.com/amkisko)
# NOTE: now available as gem sidekiq_status_monitor (https://rubygems.org/gems/sidekiq_status_monitor)
class SidekiqAliveServer
attr_accessor :workers_size_threshold,
:process_set_size_threshold,
:queues_size_threshold,
:queue_latency_threshold,
@amkisko
amkisko / _slack_button.html.erb
Last active August 24, 2023 13:36
Slack oauth2 omniauth devise implementation
<%=
button_to(omniauth_authorize_path(resource_name, provider),
method: :post,
style: "margin:1rem;align-items:center;color:#fff;background-color:#4A154B;border:0;border-radius:48px;display:inline-flex;font-family:Lato, sans-serif;font-size:16px;font-weight:600;height:48px;justify-content:center;text-decoration:none;width:256px",
"data-turbo": false) do
%>
<svg
xmlns="http://www.w3.org/2000/svg"
style="height:20px;width:20px;margin-right:12px"
viewBox="0 0 122.8 122.8"
@kaspth
kaspth / object_proxy.rb
Created June 10, 2023 14:42
Making Ruby better at object proxying, so we don't need to add `user_name` etc. for Law of Demeter.
class Object::Proxy < SimpleDelegator
def initialize(object, **values)
super(object)
@values = values
end
def method_missing(name, ...)
@values.fetch(name) { super }
end
end

This middleware does a few interesting things:

  • Ensures a url shape in the zustand store, where we'll store URL information.
  • Assumes we will be storing our url state slice in the ?state search parameter after it has been stringified and base 64 encoded.
  • On creation, decodes stores state from the ?state search parameter into the url slice of our store.
  • After each state update, updates the ?state search parameter with the new url state slice.
  • Sets up an event listener that listens for popstate and re-decodes the state from the URL into our store.