yasaichi

require 'active_support/core_ext'

class Hash
  unless method_defined?(:camelize_keys)
    def camelize_keys(first_letter = :upper)
      transform_keys { |key| key.camelize(first_letter) rescue key }
    end
  end

  unless method_defined?(:camelize_keys!)

yasaichi

class Hash
  def transform_keys
    return enum_for(:transform_keys) unless block_given?
    result = self.class.new
    each_key do |key|
      result[yield(key)] = self[key]
    end
    result
  end

yasaichi

require 'base64'

class BasicAuth
  def initialize(app, user_name:, password:)
    @app = app
    @user_name = user_name
    @password = password
  end

  def call(env)

yasaichi

require './basic_auth'

App = lambda do |env|
  [200, { "Content-Type" => "text/html" }, ["Hello, Rack world!"]]
end

use BasicAuth, user_name: 'test:user', password: 'pass'
run App

yasaichi

"""
以下の論文で提案された改良x-means法の実装

クラスター数を自動決定するk-meansアルゴリズムの拡張について
http://www.rd.dnc.ac.jp/~tunenori/doc/xmeans_euc.pdf
"""

import numpy as np
from scipy import stats
from sklearn.cluster import KMeans

yasaichi

class Object
  def behaves_like?(object)
    expected_methods =
      if object.respond_to?(:instance_methods)
        object.instance_methods
      else
        object.methods
      end

    (expected_methods - methods).empty?

yasaichi

module NeighborRecords
  def previous_one(col_name = :id)
    condition = self.class.arel_table[col_name].lt(public_send(col_name))
    self.class.where(condition).order(col_name => :desc).first
  end

  def next_one(col_name = :id)
    condition = self.class.arel_table[col_name].gt(public_send(col_name))
    self.class.where(condition).order(col_name => :asc).first
  end

yasaichi

require 'set' # Railsの場合不要

module AttrAccessorExtension
  def to_h
    Hash[self.class.__send__(:attributes).sort.map { |name| [name, public_send(name)] }]
  end

  def self.included(klass)
    klass.extend(ClassMethods)
  end

yasaichi

require "yaml"
require "active_support"
require "active_support/core_ext"

config = YAML.load_file("okuribito.yml")

class Okuribito
  CLASS_METHOD_SYMBOL = "."
  INSTANCE_METHOD_SYMBOL = "#"
  PATTERN = /\A(?<symbol>[#{CLASS_METHOD_SYMBOL}#{INSTANCE_METHOD_SYMBOL}])(?<method_name>.+)\z/

yasaichi

module AppName::JourneyRouterPatch
  APP_NAME_GENERIC_ROUTING_INFO_KEY = "app_name.generic_routing_info".freeze

  def call(env)
    response_array = super

    # NOTE: When Journey::Router#call can't resolve a request, it returns an array like:
    # [404, {'X-Cascade' => 'pass'}, ['Not Found']]
    # ref. https://github.com/rails/journey/blob/v1.0.4/lib/journey/router.rb#L80
    if response_array[1]["X-Cascade"] != "pass" && env.key?(APP_NAME_GENERIC_ROUTING_INFO_KEY)