yasaichi’s gists

yasaichi / camelize_keys.rb

Last active August 29, 2015 14:16

Hash#camelize_keys

	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 / keys.rb

Created March 13, 2015 01:28

rails/rails/blob/4-2-stable/activesupport/lib/active_support/core_ext/hash/keys.rb

	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 / basic_auth.rb

Created April 5, 2015 09:11

パーフェクト Ruby on Rails 10章

	require 'base64'

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

	def call(env)

yasaichi / x_means.py

Last active May 1, 2025 11:26

Implementation of X-means clustering in Python

	"""
	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 / behaves_like.rb

Last active August 29, 2015 14:19

Object#behaves_like?

	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 / neighbor_records.rb

Created April 19, 2015 13:30

Instance methods for ActiveRecord to fetch the "neighbor" records

	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 / attr_accessor_extension.rb

Last active August 29, 2015 14:19

Implementation "#to_h", returning a hash which includes the attribute name and its value

	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 / okuribito.rb

Last active May 21, 2016 04:41

draft of okuribito

	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 / journey_router_patch.rb

Last active August 22, 2016 03:00

	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)

Yuichi Goto yasaichi