active_support

2010鐃緒申鐃緒申鐃緒申10·鐃緒申鐃�14鐃緒申鐃緒申鐃緒申20:43

$\«\Æ\´\ê¡¼¤Ç¤¹$

Rails鐃暑Ǚ申³鐃暑™申鐃緒申臓鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申blank?\鐃緒申鐃�\½\鐃緒申鐃�\鐃緒申鐃緒申鐃緒申鐃緒申鐃�»鐃緒申鐃緒申鐃緒申鐃緒申�鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃渋�緒申鐃緒申鐃緒申��申

鐃緒申鐃�³鐃緒申鐃緒申鐃術�緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃渋￥申blank? \鐃緒申鐃�\½\鐃緒申鐃�\鐃緒申鐃緒申鐃緒申鐃緒申�鐃緒申³鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃暑¦�緒申¹鐃緒申鐃緒申鐃緒申鐃緒申鐃�µ鐃緒申鐃�µ鐃緒申鐃緒申鐃縦�緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申¹鐃緒申臓鐃�

鐃緒申鐃�µ鐃緒申鐃緒申鐃緒申鐃緒申臓��鐃緒申鐃緒申鐃緒申鐃緒申��申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申�鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申�鐃緒申鐃緒申鐃� blank? 鐃緒申鐃緒申鐃述�緒申鐃緒申�鐃緒申鐃緒申�鐃緒申·鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃獣�緒申鐃緒申鐃緒申鐃緒申·鐃緒申鐃緒申鐃縦�緒申鐃緒申�鐃緒申鐃緒申鐃緒申鐃緒申¹鐃緒申鐃縮�渋￥申鐃緒申鐃緒申鐃緒申鐃�¼鐃緒申鐃�«鐃緒申�鐃緒申blank? 鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃術�緒申鐃緒申鐃�\鐃緒申鐃�\½\鐃緒申鐃�\鐃緒申鐃緒申鐃緒申µ鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申臓�鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申��申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申·鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃�·鐃緒申鐃緒申鐃縦�渋￥申鐃緒申鐃緒申鐃緒申鐃緒申鐃獣�緒申·鐃緒申鐃緒申鐃緒申鐃緒申�鐃獣�渋�獣�渋�緒申

require 'rubygems'
require 'active_support'

p !'hoge'.blank? #=> undefined method `blank?' for "hoge":String (NoMethodError)

鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃渋�緒申鐃緒申鐃緒申鐃緒申鐃緒申�鐃緒申鐃緒申鐃� require 'active_support' 鐃緒申鐃�·鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃渋�緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申¼鐃緒申�鐃渚¡�渚™申鐃緒申鐃�»鐃淳�緒申鐃緒申鐃緒申鐃緒申鐃緒申�鐃緒申鐃緒申�鐃緒申鐃緒申鐃緒申鐃緒申¹鐃緒申鐃縮�渋￠¸鐃緒申鐃暑ø�緒申鐃緒申鐃� active_support 鐃緒申鐃緒申 3.0 鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃縦�緒申³鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃�·鐃緒申鐃緒申鐃縦�渋￥申active_support 2.x ·鐃緒申鐃緒申鐃緒申鐃緒申鐃� active_support3.0 鐃緒申鐃緒申鐃緒申 require 鐃緒申鐃緒申鐃緒申\鐃緒申鐃�\鐃緒申鐃�\鐃緒申鐃�\鐃緒申鐃�\鐃緒申鐃緒申鐃�¼\¹鐃緒申鐃縮°ǚ申鐃緒申鐃緒申鐃獣�緒申鐃緒申�鐃緒申鐃緒申鐃緒申鐃緒申¹鐃緒申臓鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申«鐃緒申鐃緒申鐃緒申鐃緒申鐃�¹鐃緒申鐃緒申鐃庶™申鐃緒申鐃緒申鐃渋￥申臓鐃�

active_support 2.x ·鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申Ð鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃遵™申鐃緒申鐃緒申鐃緒申鐃緒申鐃�·鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃渋￥申Rails 鐃暑Ǚ申³鐃暑™申鐃緒申臓鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申 blank? \鐃緒申鐃�\½\鐃緒申鐃�\鐃緒申鐃緒申鐃緒申鐃緒申�鐃緒申鐃緒申�鐃緒申鐃緒申�鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃�¹鐃緒申鐃縮�渋￥申active_support 3.0 鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申½Ð鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃�»鐃緒申鐃緒申鐃術�渋�曙¡�緒申

鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申��申鐃緒申鐃緒申鐃緒申鐃緒申�鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃渋￥申active_support 3.0 鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申 require 'active_support/core_ext' 鐃緒申鐃�·鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃�²鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申�鐃緒申鐃淳�緒申�鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申·鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃�¹鐃緒申臓鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申³鐃緒申鐃緒申鐃渋�緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申µ鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃渋�渋�緒申鐃緒申臓鐃緒申·鐃緒申鐃�«鐃緒申鐃緒申鐃緒申 i18n 鐃緒申鐃縮�緒申鐃縮�緒申鐃淳�緒申鐃緒申鐃緒申鐃緒申«鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃渋�緒申鐃緒申鐃緒申鐃緒申½鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申 gem 鐃緒申鐃緒申鐃緒申\鐃緒申鐃�\鐃緒申鐃�\¹\鐃緒申鐃緒申鐃緒申¼\鐃緒申鐃緒申鐃緒申·鐃緒申鐃緒申鐃縦�緒申鐃緒申²鐃緒申鐃緒申鐃緒申鐃緒申鐃�³鐃緒申鐃緒申鐃獣�緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申¹鐃緒申�鐃緒申

require 'rubygems'
require 'active_support/core_ext'

p !'hoge'.blank? #=> true

鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃獣�緒申鐃緒申鐃� active_support 鐃緒申鐃緒申3鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申��Ǚ申鐃緒申²½鐃緒申鐃�µ鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申¹鐃緒申�鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申�鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申�鐃緒申鐃緒申�鐃緒申鐃緒申�鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申¹鐃緒申鐃緒申鐃緒申鐃緒申臓鐃�

# activesupport-3.0.0/lib/active_support/all.rb

require 'active_support'
require 'active_support/time'
require 'active_support/core_ext'

鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃塾�緒申鐃緒申鐃緒申鐃渋￥申active_support/core_ext.rb 鐃緒申鐃緒申鐃渋�緒申鐃緒申鐃緒申鐃縦�緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃�³鐃緒申鐃緒申鐃術�緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃渋￥申core_ext 鐃暑Ǚ申²¼鐃緒申鐃緒申鐃述�緒申鐃緒申鐃緒申鐃緒申鐃緒申 require 鐃緒申鐃�·鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃�¹鐃緒申臓鐃�

# activesupport-3.0.0/lib/active_support/core_ext.rb

Dir["#{File.dirname(__FILE__)}/core_ext/*.rb"].sort.each do |path|
  require "active_support/core_ext/#{File.basename(path, '.rb')}"
end

¼鐃緒申鐃緒申鐃暑Ǚ申鐃緒申鐃緒申 Rails \鐃緒申\鐃緒申\鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申³鐃緒申鐃緒申鐃獣�緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃� require 鐃緒申鐃�·鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃渋�緒申«鐃緒申鐃緒申鐃緒申鐃緒申鐃�¼鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申»鐃淳�緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申«鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃塾�緒申鐃緒申�鐃緒申鐃緒申鐃緒申鐃渋￥申railties 鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申 Rails 鐃緒申鐃緒申鐃緒申\³\鐃緒申\鐃緒申鐃�\鐃緒申鐃�\鐃緒申鐃�\鐃緒申鐃�\鐃緒申鐃緒申鐃緒申鐃緒申�鐃緒申鐃緒申鐃� (railties-3.0.0/lib/rails/console/app.rb) 鐃緒申鐃緒申鐃緒申 require 'active_support/all' 鐃緒申鐃�·鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃�·鐃緒申鐃緒申鐃縦�渋�緒申鐃緒申臓鐃�

鐃緒申鐃緒申鐃緒申鐃緒申臓鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申�鐃緒申鐃緒申鐃緒申鐃緒申�鐃緒申鐃緒申鐃� Rails 鐃暑Ǚ申³鐃暑™申鐃緒申臓鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申 blank? \鐃緒申鐃�\½\鐃緒申鐃�\鐃緒申鐃緒申鐃緒申鐃緒申鐃�»鐃緒申鐃緒申鐃緒申鐃緒申�鐃緒申鐃緒申�鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申�鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃渋￥申

active_support 2.x ·鐃緒申鐃�

require 'rubygems'
require 'active_support'

active_support 3.0

# sudo gem install i18n 鐃緒申鐃�¹鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申�鐃緒申鐃淳�緒申鐃緒申鐃緒申鐃�
require 'rubygems'
require 'active_support/core_ext'

\鐃緒申鐃�\鐃緒申鐃緒申臓鐃�: ruby; active_support

2009鐃緒申鐃緒申鐃緒申09·鐃緒申鐃�17鐃緒申鐃緒申鐃緒申07:05

$\«\Æ\´\ê¡¼¤Ç¤¹$ Ruby

Rails鐃緒申鐃緒申鐃緒申index_by鐃緒申鐃緒申鐃緒申»鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃�\鐃緒申鐃�\鐃緒申鐃�\·\鐃緒申鐃�·鐃緒申鐃�¼鐃暑™申鐃緒申鐃�\鐃緒申鐃緒申鐃緒申¼\鐃緒申�鐃緒申鐃緒申鐃�¼鐃緒申�鐃緒申鐃�¼鐃緒申鐃緒申鐃緒申鐃緒申鐃�

rails 鐃緒申鐃緒申鐃緒申»鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃�\鐃緒申鐃緒申鐃緒申¼\鐃緒申�鐃緒申鐃緒申鐃�¼鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申·鐃緒申鐃緒申鐃縦�緒申鐃緒申鐃緒申鐃緒申鐃緒申臓��鐃緒申��術�緒申鐃緒申鐃�·鐃緒申鐃緒申鐃緒申鐃緒申鐃�\鐃緒申鐃緒申鐃緒申¼\鐃緒申�鐃緒申�鐃緒申鐃緒申�鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申»鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃渋�緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃獣�緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃縮�緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申¹鐃緒申臓��鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申�鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃�»鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃�\鐃緒申鐃緒申鐃緒申¼\鐃緒申�鐃緒申鐃緒申鐃�\鐃緒申\鐃緒申鐃�\»\¹鐃緒申鐃�·鐃緒申鐃緒申鐃縦�緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃�«鐃緒申臓鐃�

# find(:all) 鐃緒申鐃�¹鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃�³鐃緒申鐃緒申鐃術�緒申鐃緒申鐃�·鐃緒申鐃�¼鐃暑™申鐃緒申鐃緒申鐃緒申鐃緒申�鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃�
[ 
  #<data1>, 
  #<data2>, 
  #<data3>, ... 
]

# 鐃緒申鐃�³鐃緒申鐃緒申鐃緒申·鐃緒申鐃�¼鐃暑™申鐃緒申鐃�¼鐃緒申�鐃緒申鐃�¼鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申�鐃緒申鐃緒申鐃�
{ 
  :key1 => #<data1>, 
  :key2 => #<data2>, 
  :key3 => #<data3>, ... 
}

鐃緒申鐃�³鐃緒申鐃緒申鐃渋�緒申鐃緒申鐃緒申鐃緒申鐃緒申�鐃緒申鐃緒申鐃�\鐃緒申鐃�\鐃緒申鐃�\·\鐃緒申鐃緒申鐃緒申鐃緒申鐃�·鐃緒申鐃緒申鐃緒申鐃緒申鐃�¼鐃緒申�鐃緒申鐃�¼鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申�鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申�鐃緒申鐃緒申鐃緒申鐃緒申¹鐃緒申臓鐃緒申³鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃獣�緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申�鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申�鐃緒申«鐃緒申鐃緒申鐃緒申鐃緒申�鐃緒申鐃緒申鐃緒申鐃緒申»鐃淳�緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃純™申鐃緒申鐃緒申鐃緒申鐃緒申�鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃� index_by 鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申\鐃緒申鐃�\½\鐃緒申鐃�\鐃緒申鐃緒申鐃緒申鐃緒申鐃�»鐃緒申鐃緒申鐃緒申鐃緒申�鐃緒申³鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃殉�緒申鐃緒申鐃�¼鐃緒申鐃緒申鐃緒申鐃緒申鐃�½Ð鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃塾�緒申鐃緒申�鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申¹鐃緒申鐃緒申鐃緒申鐃緒申�鐃緒申active_support 鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申 Enumerable 鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申²鐃緒申鐃緒申鐃緒申µ鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申\鐃緒申鐃�\½\鐃緒申鐃�\鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申¹鐃緒申�鐃緒申鐃緒申臓鐃�

鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃殉�緒申鐃緒申鐃緒申鐃渋￥申鐃�³鐃緒申鐃緒申鐃渋�緒申鐃緒申鐃緒申鐃緒申鐃緒申�鐃緒申鐃緒申鐃�\鐃緒申鐃緒申鐃緒申¼\鐃緒申鐃�\鐃緒申鐃緒申鐃緒申鐃緒申鐃�»鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃�¼鐃緒申鐃緒申鐃暑Ǚ申鐃緒申鐃緒申»鐃緒申�鐃緒申·鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃塾�緒申鐃緒申鐃緒申鐃緒申·鐃緒申鐃緒申鐃縦�渋￥申�鐃緒申鐃緒申�鐃獣￥申鐃緒申鐃渋�獣�渋�緒申

# sample \鐃緒申鐃緒申鐃緒申¼\鐃緒申鐃�\鐃緒申鐃�

+----+---------+---------+---------------------+
| id | value_1 | value_2 | created_at          |
+----+---------+---------+---------------------+
|  1 | hoge    | fuga    | 2009-09-15 23:40:35 | 
|  2 | foo     | bar     | 2009-09-15 23:40:35 | 
|  3 | hoge    | HOGE    | 2009-09-15 23:40:35 | 
|  4 | hoge    | fuga    | 2009-09-15 23:40:35 | 
|  5 | FOO     | BAR     | 2009-09-15 23:40:35 | 
+----+---------+---------+---------------------+

symbol 鐃緒申鐃緒申鐃緒申»鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申·鐃緒申鐃緒申鐃縦�緒申鐃緒申鐃緒申鐃緒申鐃� key 鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃�¹鐃緒申臓鐃�symbol 鐃緒申鐃緒申鐃渋�緒申鐃暑™申鐃緒申鐃� & 鐃緒申鐃緒申鐃述�緒申鐃緒申鐃緒申鐃緒申�鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申�鐃緒申鐃緒申�鐃緒申鐃緒申��申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申�鐃緒申鐃緒申鐃緒申鐃緒申·鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃�µ鐃緒申鐃緒申鐃緒申鐃緒申臓鐃�

Sample.find(:all).index_by(&:value_1)
#{
#  "hoge"=> #<Sample id: 4 ...>, # 鐃緒申鐃緒申鐃緒申鐃緒申鐃�«鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃縦�緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃�¾鐃緒申鐃�½鐃緒申�鐃緒申鐃緒申鐃�µ鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申
#  "FOO" => #<Sample id: 5 ...>,
#  "foo" => #<Sample id: 2 ...>
#}

index_by 鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃述°ǚ申鐃緒申鐃緒申鐃緒申鐃緒申鐃�·鐃緒申鐃�«鐃緒申鐃緒申鐃緒申»鐃緒申鐃緒申·鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃縦�緒申鐃緒申鐃緒申鐃渋￠Æ鐃殉�緒申鐃緒申鐃� key 鐃緒申鐃緒申鐃緒申»鐃緒申鐃緒申鐃緒申鐃�\鐃緒申鐃緒申鐃緒申¼\鐃緒申�鐃緒申�鐃緒申鐃緒申�鐃峻�緒申鐃緒申鐃緒申鐃�¾鐃緒申鐃�¹鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申«鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申\鐃緒申鐃緒申鐃緒申¼\鐃緒申�鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃�¾鐃緒申鐃�½鐃緒申�鐃緒申鐃緒申鐃�µ鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃�¹鐃緒申臓鐃�¾鐃緒申鐃緒申鐃緒申鐃緒申�鐃渋�緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申臓鐃�hoge 鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申 key 鐃緒申鐃緒申鐃緒申鐃緒申鐃�Ð鐃緒申鐃�·鐃緒申鐃緒申鐃緒申 id:1 鐃緒申鐃緒申鐃緒申 id:3 鐃緒申鐃緒申鐃緒申\鐃緒申鐃緒申鐃緒申¼\鐃緒申�鐃緒申鐃緒申鐃�¾鐃緒申鐃�½鐃緒申�鐃緒申鐃緒申鐃�µ鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申¾鐃緒申鐃緒申鐃署¨�緒申鐃緒申鐃緒申鐃緒申·鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃�¹鐃緒申鐃緒申鐃渋�緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申��緒申·鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃�µ鐃緒申鐃緒申鐃緒申鐃緒申臓鐃�

鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃塾�緒申鐃緒申鐃� group_by 鐃緒申鐃緒申鐃緒申»鐃緒申鐃緒申鐃緒申鐃緒申�鐃緒申鐃緒申鐃緒申鐃渋￠Æ鐃殉�緒申鐃緒申鐃� key 鐃緒申鐃緒申鐃緒申鐃緒申鐃�Ð鐃緒申鐃�·鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃縦�峻�緒申鐃緒申�鐃緒申鐃緒申鐃緒申鐃緒申�鐃緒申鐃緒申鐃緒申鐃�¾鐃緒申鐃�¹鐃緒申鐃緒申鐃渋￠Ç鐃緒申��術�緒申鐃緒申鐃緒申鐃緒申鐃緒申�鐃峻�緒申鐃緒申鐃�»鐃緒申鐃緒申·鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃�¹鐃緒申臓鐃緒申鐃緒申�鐃緒申鐃緒申鐃緒申鐃緒申·鐃緒申臓鐃�\鐃緒申鐃緒申鐃緒申¼\鐃緒申鐃�¼«鐃緒申鐃緒申鐃渋�緒申鐃�\鐃緒申鐃�\鐃緒申鐃�\·\鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃渋￠Ç鐃緒申��術�緒申鐃緒申鐃緒申鐃緒申鐃緒申�鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申�鐃緒申鐃緒申鐃緒申鐃緒申鐃�²鐃緒申�鐃緒申鐃緒申�鐃緒申鐃緒申�鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申�鐃緒申鐃緒申�鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申�鐃緒申«鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申臓鐃渋￥申

Sample.find(:all).group_by(&:value_1)
#[
#  [ "hoge", [#<Sample id: 1 ...>, #<Sample id: 3 ...>, #<Sample id: 4 ...>] ],
#  [ "foo",  [#<Sample id: 2 ...>] ],
#  [ "FOO",  [#<Sample id: 5 ...>] ]
#]

鐃緒申鐃�µ鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申臓鐃�\鐃緒申鐃緒申鐃緒申¼\鐃緒申鐃�\鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申µ鐃緒申鐃緒申鐃緒申\«\鐃緒申鐃�\鐃緒申鐃緒申鐃緒申鐃緒申鐃� key 鐃緒申鐃緒申鐃緒申鐃緒申鐃�¹鐃緒申鐃緒申鐃緒申鐃緒申鐃�³鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申²鐃緒申鐃緒申鐃緒申½鐃緒申鐃緒申鐃緒申鐃緒申鐃�¹鐃緒申臓鐃�\鐃緒申鐃�\鐃緒申鐃�\鐃緒申鐃�\鐃緒申鐃�·鐃緒申鐃�¼鐃暑™申鐃緒申鐃� key 鐃緒申鐃緒申鐃緒申»鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申¹鐃緒申鐃緒申鐃緒申鐃緒申鐃�³鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃�鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃塾�緒申鐃緒申�鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申¹鐃緒申臓鐃緒申³鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃縮�緒申鐃緒申鐃緒申鐃緒申¹鐃緒申鐃緒申鐃緒申鐃緒申�鐃緒申鐃緒申臓鐃�

Sample.find(
  :all, 
  :select => %q/CONCAT(value_1, value_2) AS hoge/
).index_by(&:hoge))
#{
#  "foobar"   => #<Sample id: 2 ...>,
#  "hogefuga" => #<Sample id: 4 ...>,
#  "FOOBAR"   => #<Sample id: 5 ...>,
#  "hogeHOGE" => #<Sample id: 3 ...>
#}

Sample.find(:all).index_by { |sam| "#{sam.value_1}#{sam.value_2}" }
#{
#  "foobar"   => #<Sample id: 2 ...>,
#  "hogefuga" => #<Sample id: 4 ...>,
#  "FOOBAR"   => #<Sample id: 5 ...>,
#  "hogeHOGE" => #<Sample id: 3 ...>
#}

\鐃緒申鐃�\鐃緒申鐃緒申臓鐃�: ruby; active_support; index_by

2009鐃緒申鐃緒申鐃緒申09·鐃緒申鐃�07鐃緒申鐃緒申鐃緒申01:47

$\«\Æ\´\ê¡¼¤Ç¤¹$ Ruby

Ruby鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃巡Ǚ申鐃緒申�鐃緒申鐃緒申鐃�·鐃緒申»»鐃緒申鐃�¹鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申active_support»鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃�

Ruby 鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃巡Ǚ申鐃緒申�鐃緒申鐃緒申辧鐃�·鐃緒申鐃緒申鐃獣�緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申臓鐃�active_support 鐃緒申�鐃緒申rails 鐃緒申鐃緒申鐃緒申\鐃緒申鐃�\鐃緒申鐃�\¹\鐃緒申鐃緒申鐃緒申¼\鐃緒申鐃緒申鐃緒申¹鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃暑ǚ申½鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申�鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃�\鐃緒申鐃�\鐃緒申鐃�\鐃緒申鐃�\鐃緒申鐃�\鐃緒申鐃緒申鐃渋�緒申鐃緒申鐃縮�緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃縮�緒申鐃緒申鐃緒申鐃緒申鐃緒申�鐃緒申鐃緒申鐃緒申鐃緒申¹鐃緒申�鐃曙¡�曙™申��申鐃緒申鐃緒申鐃緒申��申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申¹鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申\³鐃緒申鐃�¼\鐃緒申鐃緒申鐃緒申鐃緒申�鐃緒申«鐃緒申鐃緒申鐃縦�緒申鐃緒申��申鐃緒申�鐃緒申�鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃�»鐃淳�緒申鐃緒申�鐃緒申鐃緒申�鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申�鐃緒申¾鐃緒申臓鐃�

#!/usr/bin/ruby
 
require 'rubygems'
require 'active_support'
 
t = Time.now # Mon Sep 07 00:24:07 +0900 2009
 
t - 5.days  # 5鐃緒申鐃緒申鐃巡Ǚ申鐃緒申   (Wed Sep 02 00:24:07 +0900 2009)
t - 1.week  # 1½µ鐃緒申鐃緒申�鐃緒申鐃緒申 (Mon Aug 31 00:24:07 +0900 2009)
t - 2.years # 2鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃�   (Fri Sep 07 00:24:07 +0900 2007)
 
# xxx鐃緒申鐃緒申��申鐃緒申鐃緒申鐃緒申鐃緒申鐃� ago 鐃緒申鐃緒申鐃緒申»鐃緒申鐃緒申鐃緒申鐃緒申鐃�
1.hour.ago # 1鐃緒申鐃緒申鐃巡Ǚ申鐃緒申 (Sun Sep 06 23:24:07 +0900 2009)
 
# xxx鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申 since 鐃緒申鐃緒申鐃緒申»鐃緒申鐃緒申鐃緒申鐃緒申鐃�
2.days.since # 2鐃緒申鐃緒申鐃巡™申鐃緒申鐃� (Wed Sep 09 00:26:07 +0900 2009)
 
t.yesterday # Mon Sep 06 00:24:07 +0900 2009
t.tomorrow  # Mon Sep 08 00:24:07 +0900 2009

t.beginning_of_month # ·鐃緒申鐃�½鐃緒申鐃緒申鐃緒申鐃緒申鐃�  (Tue Sep 01 00:00:00 0900 2009)
t.last_month         # 1\鐃緒申鐃�·鐃緒申�鐃緒申鐃緒申 (Fri Aug 07 00:24:07 0900 2009)

2.minutes.ago.class # Time \鐃緒申鐃�\鐃緒申鐃�\¹鐃緒申鐃縮�緒申鐃緒申�鐃緒申鐃緒申鐃�

鐃緒申鐃緒申鐃緒申鐃緒申鐃�²鐃緒申鐃緒申鐃緒申鐃緒申鐃�·鐃緒申鐃緒申鐃緒申鐃緒申鐃�¾鐃緒申鐃緒申鐃緒申鐃緒申鐃曙™申鐃緒申鐃緒申鐃緒申¹鐃緒申�鐃曙™申½鐃緒申鐃緒申鐃緒申鐃緒申鐃�¾鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃縦�緒申·鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃殉�縦�緒申·鐃緒申鐃緒申鐃緒申�鐃緒申鐃緒申弌��緒申µ鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃縦�緒申鐃緒申鐃緒申鐃渋￥申1.days 鐃緒申鐃緒申鐃緒申鐃緒申鐃�«½鐃緒申�鐃緒申«鐃緒申鐃緒申鐃暑™申鐃緒申鐃� 1.day 鐃緒申鐃緒申鐃緒申½鐃緒申�鐃緒申�鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申�鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申«鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃�¹鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃�¹鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申臓鐃�ago 鐃緒申鐃緒申鐃緒申 since 鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃�½鐃緒申鐃緒申鐃緒申鐃緒申鐃�¾鐃緒申鐃緒申鐃緒申 until 鐃緒申鐃緒申鐃緒申 from_now 鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申 alias 鐃緒申鐃縮�緒申鐃緒申弌��緒申µ鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃獣�緒申鐃緒申鐃緒申鐃緒申¹鐃緒申臓鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申«鐃緒申鐃緒申鐃縦�緒申�鐃緒申鐃緒申鐃緒申鐃緒申³鐃緒申鐃緒申鐃術�緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃渋￥申

# ...lib/active_support/core_ext/numeric/time.rb

alias :second   :seconds
alias :minute   :minutes
alias :hour     :hours
alias :day      :days
alias :week     :weeks
alias :until    :ago
alias :from_now :since

鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃縦�渋￥申Time \鐃緒申鐃�\鐃緒申鐃�\¹鐃緒申鐃緒申鐃緒申鐃緒申鐃殉�緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃渋￥申Date \鐃緒申鐃�\鐃緒申鐃�\¹鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申�鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申�鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃暑î�緒申¹鐃緒申鐃緒申鐃緒申鐃緒申鐃�³鐃緒申鐃緒申鐃緒申鐃緒申鐃縮�緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃�¹鐃緒申臓鐃�

#!/usr/bin/ruby
 
require 'rubygems'
require 'active_support'
 
d = Date.today # Mon, 07 Sep 2009

d - 2.days # 2鐃緒申鐃緒申鐃巡Ǚ申鐃緒申 (Sat, 05 Sep 2009)
 
(d - 2.days).class # Date \鐃緒申鐃�\鐃緒申鐃�\¹鐃緒申鐃縮�緒申鐃緒申�鐃緒申鐃緒申鐃�
(d - 1.hour).class # ¼«鐃緒申鐃緒申��申鐃緒申��申鐃緒申鐃�\\鐃緒申鐃�\¹\鐃緒申鐃緒申鐃緒申µ鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申 Time \鐃緒申鐃�\鐃緒申鐃�\¹鐃緒申鐃縮�緒申鐃緒申�鐃緒申鐃緒申鐃�

鐃緒申鐃�³鐃緒申鐃�³鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃�¾鐃緒申鐃緒申鐃緒申鐃緒申鐃曙™申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃暑î�緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申臓��鐃緒申��申鐃緒申�鐃緒申鐃緒申�鐃縦￥申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃渋�緒申鐃�³鐃緒申��申·鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃�鐃緒申鐃緒申鐃緒申鐃緒申鐃�¹鐃緒申鐃緒申鐃緒申鐃緒申臓鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申�鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃�»鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申«鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃�¹鐃緒申鐃緒申鐃緒申鐃緒申臓鐃緒申«鐃緒申鐃緒申鐃緒申鐃緒申鐃�³鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申\³鐃緒申鐃�¼\鐃緒申鐃緒申鐃緒申鐃緒申鐃�½鐃緒申�鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃�·鐃緒申鐃緒申鐃緒申鐃緒申�鐃緒申鐃緒申臓鐃�