takuma-saito

module Delegatable
  def self.included(base)
    base.class_eval do
      def self.delegate_method(method, to)
        define_method(method) do |*args|
          instance_variable_get(to).__send__(method, *args)
        end
      end
    end
  end

takuma-saito

class String
  def underscore
    self.scan(/[A-Z][a-z]+/).map { |name| name.tr('A-Z', 'a-z') }.join("_")
  end
end
class Crumb
  def initialize(mgr, &block)
    @mgr = mgr
    @block = block
  end

takuma-saito

class Gmail
  def initialize(&block)
    @block = block
    @items = []
  end
  def run    
    self.instance_eval(&@block)
    @items.join(" ")
  end
  def cond(condition, &block)

takuma-saito

# 問題:
#   http://hidesugar.web.fc2.com/ym2/ym2musikuizan2.txt
#   ABCDEF * G = FABCDE
# 解答: 230769 * 4 = 923076

def solve(sx, sy, sz, mapping)
  x = sx.inject(0) {|sum, x| sum * 10 + mapping[x]}
  y = sy.inject(0) {|sum, y| sum * 10 + mapping[y]}
  z = Enumerator.new do |e|
    t = (x * y)

takuma-saito

class Future
  def initialize(&block)
    @que = Queue.new
    @t = Thread.new {
      @que << block.call
    }
  end
  def value
    return @que.pop
  ensure

takuma-saito

class ConnectionPool
  attr_reader :conns
  def initialize(max, &block)
    @mutex = Mutex.new # マルチスレッドからの排他的ロック
    @cv = ConditionVariable.new
    @max = max
    @que = []
    @conns = []
    @create_block = block
    @created = 0

takuma-saito

require 'digest/md5'

module SecurablePassword
  def self.included(base)
    base.extend(ClassMethods)
  end
  module ClassMethods
    def has_secure_password(name = :password)
      include HasSecurePassword.new(name)
    end

takuma-saito

class Topic
  attr_reader :name
  def initialize(name)
    @name = name
    @clients = {}
  end
  def publish(message)
    @clients.values.each {|client| client.receive(@name, message)}
  end

takuma-saito

source 'https://rubygems.org'
gem 'open_uri_redirections'

takuma-saito

require 'thread'

class Workers
  def initialize(count)
    @q = Queue.new
    @count = count
    @jobs = (0...@count).map.with_index {|id|
      Thread.new do
        while (job = @q.pop)
          total = job.(id, total)