rails decorator

Several programming skills for accelerating Ruby on Rails, rubyrails Ruby is often praised for its flexibility. As Dick Sites says, you can "Program for programming ". Ruby on Rails extends the core Ruby language, but Ruby itself makes this extension possible. Ruby on Rails uses the flexibility of this language, so that you can easily write highly structured prog

Definition: Dynamically add some extra responsibilities to an object, just like painting on a wall. Using the decorator mode, it is more flexible to achieve the expansion of the function by the method of generating subclasses.Design: Often can use inheritance to achieve the expansion of the function, if these need to expand the variety of functions, it is bound to generate a lot of subclasses, increase the complexity of the system, while the use of in

Use Ruby on Rails to quickly develop web applications. Ruby on Rails is impacting the entire Web development field. Let's first understand the underlying technologies: Ruby is a free, simple, intuitive, scalable, portable, and interpreted scripting language for fast and simple object-oriented programming. Similar to Perl, it supports many features for processing text files and executing system management ta

Python tutorial 11 -- Python decorator A function is also an object, and a function object can be assigned to a variable. Therefore, a function can also be called through a variable. The function object has a (Double underline + name + double underline) attribute. You can get the function name: Now, let's assume that we want to enhance the functions of the now () function, for example, to automatically print logs before and after the function call, b

Python decorator learning and Practical Use Cases Preface I was reading the Flask framework a few days ago. I don't really understand it. I came back to the homework of the decorator. I have read a lot of articles about the decorator. I will sort out the methods and examples that suit my own ideas and share them with you. app=Flask(__name__) @app.route(

air_conditioner(self): print("空调真舒服！") def decorator(self, component): """用来额外添加装饰方法的""" self.ornamental = component# 由于汽车的装饰品会发生变化class Cushion(object): """ 坐垫 """ def __init__(self): self.name = "席梦思"class Flower(object): """ 装饰花 """ def __init__(self, name): self.name = nameif __name__ == '__main__': car = Car() cushion = Cushion() flower = Flower("玫瑰") # 汽车添加一个坐垫 car.dec

Python decorator implements the DRY (no repeated code) principle, pythondry The Python decorator is a powerful tool for eliminating redundancy. As you modularize a function into an appropriate size method, the decorator Can make it a concise function even for the most complex workflow. For example, let's take a look at the Django web framework. This framework rec

The last time I said briefly what is the decorator mode and some of the characteristics of the decorator mode, this time to say the application of decorator mode.　　first , the main participation of the class or interface1.component: A class that the decorator and the decorated person inherit together, defines the metho

1. Start with Python Python is a powerful language. It contains a lot of magical skills. As a dynamic language, its inherent advantages make it difficult to achieve many static languages. What we show today is a very useful feature in Python: "decorator", which can be translated as "decorator" in Chinese. So what is decorator? In dr. Dobb'sArticleDecorators ar