atsuya046

# paperclipでは画像ファイル以外も添付できるので、気をつけないと画像ファイル以外のObjectからも呼ばれる危険性がある。
# 画像ファイルに限定したUtilityメソッドを安全に定義するための例として以下の様な実装を考えてみた。

module ImageFileDecorator
  extend ActiveSupport::Concern

  module ClassMethods

    # Public
    #

atsuya046

; ====== 値の束縛 ========
; シンボルに値を束縛する(いわゆる代入)
(def x 3)
(def y (+ x 1))


; ====== 関数 ========
; 関数を定義する
(defn hello-clojure []
  (println "Hello Clojure"))

atsuya046

# -*- coding: utf-8 -*-

import copy

class Prototype:
	def __init__(self):
		self._objects = {}

	def register_object(self, name, obj):
		"""Register an object"""

atsuya046

"""http://peter-hoffmann.com/2010/extrinsic-visitor-pattern-python-inheritance.html"""

class Node(object):
	pass

class A(Node):
	pass

class B(Node):
	pass

atsuya046

# -*- coding: utf-8 -*-

# http://ginstrom.com/scribbles/2007/10/08/design-patterns-python-style/

"""Implementation of the abstract factory pattern"""

import random

class PetShop:
	"""A pet shop"""

atsuya046

# -*- coding: utf-8 -*-

import os
import fnmatch

class Expression(object):
	def __and__(self, other):
		return And(self, other)

	def __or__(self, other):

atsuya046

# -*- coding: utf-8 -*-

"""
A class which defines a composit object which can store
hierarchical dictionaries with names.

This class is same as a hierarchical dictionary, but it
provides method to add/accesss/modify children by name,
like a Composit.

atsuya046

# -*- coding: utf-8 -*-

"""http://en.wikibooks.org/wiki/Computer_Science_Design_Patterns/Bridge_Pattern#Python"""

# ConcreteImplementor 1/2
class DrawingAPI1(object):
	def draw_circle(self, x, y, radius):
		print('API1.circle at {}:{} radius {}'.format(x, y, radius))

atsuya046

# -*- coding: utf-8 -*-

"""http://code.activestate.com/recipes/413838-memento-closure/"""

import copy

def Memento(obj, deep=False):
	state = (copy.copy, copy.deepcopy)[bool(deep)](obj.__dict__)

	def Restore():

atsuya046

# -*- coding: utf-8 -*-

import os

class MoveFileCommand(object):
	def __init__(self, src, dest):
		self.src = src
		self.dest = dest

	def execute(self):