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# Okasaki style Functional Red Black Tree
# https://www.cs.tufts.edu/comp/150FP/archive/chris-okasaki/redblack99.pdf
#
# leaves and root are black
# BST
# No red node has a red child
# Every path from the root to a leaf has the same number of black nodes

module RBTree
  class Leaf

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---
include:
  - "app/**/*.rb"
  - "config/**/*.rb"
  - "lib/**/*.rb"
exclude:
  - spec/**/*
  - vendor/**/*
  - ".bundle/**/*"
require:

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module Clsx
  def clsx(*args)
    process_args = args.map do |arg|
      if arg.is_a?(Array)
        clsx(*arg)
      elsif arg.is_a?(Hash)
        arg.map do |key, value|
          key if value
        end
      else

ZilvinasKucinskas

These instructions set up a way to publish tweets to Twitter's OAuth2 API from a Ruby on Rails app.

1. Set up a twitter account via the Twitter account setup instructions here: https://github.com/jkotchoff/twitter_oauth2#twitter-account-setup

2. Add the twitter_oauth2 gem and something to issue HTTP requests (like Typhoeus) to your Gemfile:

gem 'twitter_oauth2'
gem 'typhoeus'

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GPG and git on macOS

Setup

No need for homebrew or anything like that. Works with https://www.git-tower.com and the command line.

1. Install https://gpgtools.org -- I'd suggest to do a customized install and deselect GPGMail.
2. Create or import a key -- see below for https://keybase.io
3. Run gpg --list-secret-keys and look for sec, use the key ID for the next step
4. Configure git to use GPG -- replace the key with the one from gpg --list-secret-keys

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# @see https://docs.aws.amazon.com/ja_jp/AmazonCloudFront/latest/DeveloperGuide/LocationsOfEdgeServers.html
# @see https://morizyun.github.io/ruby/rails-controller-get-ip.html
# @see https://dev.classmethod.jp/cloud/aws/get-ec2-public-ip-range-by-powershell/
# @see https://github.com/rails/rails/blob/c81af6a/actionpack/lib/action_dispatch/middleware/remote_ip.rb#L112-L150
Rails.application.configure do
  ip_ranges_res = Faraday.get('https://ip-ranges.amazonaws.com/ip-ranges.json')
  ip_ranges = JSON.parse(ip_ranges_res.body)
  cloudfront_ips = ip_ranges['prefixes'].select { |v| v['service'] == 'CLOUDFRONT' }.map { |v| IPAddr.new(v['ip_prefix']) } +
                   ip_ranges['ipv6_prefixes'].select { |v| v['service'] == 'CLOUDFRONT' }.map { |v| IPAddr.new(v['ipv6_prefix']) }

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 frozen_string_literal: true

# A leaky bucket rate limiter for Ruby
#
# @see https://www.mikeperham.com/2020/11/09/the-leaky-bucket-rate-limiter/
# @see https://en.wikipedia.org/wiki/Leaky_bucket
class RateLimit
  class Error < StandardError
    attr_accessor :retry_in