ruby decorator

Multiple ruby traversal folder code instances collected, ruby instances 1. traverse all files in the folder and output file names Copy codeThe Code is as follows:Def traverse_dir (file_path)If File. directory? File_pathDir. foreach (file_path) do | file |If file! = "." And file! = ".."Traverse_dir (file_path + "/" + file)EndEndElsePuts "File :#{ File. basename (file_path)}, Size: # {File. size (file_path )}

Ruby implements the active mail push trigger program, and ruby implements mail triggering After receiving the email, the mail server pushes the notification program. Is there any way to achieve this? 1. Client polling2. The server actively pushes data. First, familiarize yourself with the protocol for sending and receiving emails:Net: SMTP (send mail)Net: POP3 (receive mail)Net: IMAP (receive mail) There ar

Document directory 1.1. How does the demand come from? 1.2. The token should be retained as it remains unchanged. 1.3. minimize changes! 2.1. Syntactic sugar 2.2. built-in decorators 2.3. functools Module Happy New Year ~ So, I haven't updated it for a long time. In fact, I don't think much about it, because the python documentation seems very comprehensive ...... All you can do is to translate and organize the documents. If you pass through the English language, you may want to go t

In fact, it is a bit difficult to understand the decorator mode, especially for beginners, because its concepts conflict with each other and where conflicts exist. I keep my consistent writing style and focus on getting started. In my own articleArticleWe will use a more appropriate metaphor to solve the problem. The example is simple but highlights. Before I wrote this article, I searched some articles on the Internet about the "decorating by mod

Decorator Decorative Mode (structural mode)Subclass complex sub-class, how many subclassesJoin us we need to develop a tank for the game, in addition to different models of tanks, we also want to add a variety of features in different situations: such as infrared night vision function, such as water amphibious function, such as satellite positioning function and so on.Problem code: /// /// Abstract Tank /// Public Abstract class Tank

Adorner BasicsThe previous quick introduction to the adorner syntax, here, we will go deep inside the adorner working mechanism, more detailed and systematic introduction of the content of the adorner, and learn to write their own new adorners more advanced syntax.=================================================================================What is an adorner?Decorations are a way of specifying management code for functions and classes. The Python adorner is presented in two forms:The "1" fun

"Decorator Mode" in Java design modeDecoration mode The decoration of the new house does not change the nature of the house, but it can make the building more beautiful, more warm and more practical. In software design, the functions of existing objects (new houses) are extended (renovated). The common function is encapsulated in the adorner, where it is used to make the call. Adornment mode is a technique used in place of inheritance, which uses an a

Brief explanation of the scope of Ruby Object-Oriented Programming and ruby Object-Oriented Programming Scope Ruby does not have nested scopes (internal scopes, which can be viewed as external scopes). Their scopes are completely separated. Once a new scope is entered, the original binding will be replaced with a new binding group. The program will close the prev

Ruby captures web images and ruby captures images. Some time ago, I saw a lot of scripts written by my sister, and I wrote one myself. Module CommonHelper require 'nokogiri 'require 'open-uri 'def down_load_xmz site_url = "http://www.xxx.com" for index_page in 1 .. 141 doc_html = Nokogiri: HTML (open (site_url + '/share/comment-page-' + index_page.to_s) doc_html.css ("# comments p img "). each do | item_i

Ruby Web Real-Time Message backend server push technology --- GoEasy, ruby --- goeasy More and more projects require real-time message pushing and receiving. How can we use Ruby to achieve the most convenient? We recommend that you use GoEasy, a third-party PUSH Service Platform. You can use its APIs to easily push messages in real time! Browser compatibility: Go

Ruby concise learning notes (2): class inheritance, attributes, class variables, and ruby learning notes 1. How to declare a subclassCopy codeThe Code is as follows:Class Treasure In this way, the property names and descriptions of Thing classes are inherited by Treasure. 2. What are the parameters used to pass in the initialize method of the parent class in the following three methods?Copy codeThe Code is

Ruby Plus is a site offering free Ruby and rails related screencasts recorded by Bala paranj, much in the same vein as Ryan Bates 'railscasts. the screencasts are generally similar in length and overall format to those from railscasts. so far there are 29 episodes you can download. The first twelve screencasts in the archive (for which you have to register to download, alas) were exclusively

Before I speak the Python decorator, I would like to give an example, although a bit dirty, but with the decorator this topic is very appropriate.Everyone has underwear main function is used to modesty, but in the winter it can not wind and cold for us, how to do? One of the ways we think of it is to change the underwear, let it become thicker and longer, so that it not only has the modesty function, but al

statements. In addition, advanced dynamic languages often use anonymous functions to implement closure, decorator, and other advanced syntaxes. In some cases, the use of lambda expressions makes the python program look very concise. For example, the following is a sample code that sorts dict elements by value: >>> foo = {'father' : 65, 'mother' : 62, 'sister' : 38, 'brother' : 29, 'me' : 28}>>> sorted(foo.iteritems(), key=lambda x: x[1])[('me', 28),

Decorator schema C # simple example, Decorator schema C # simple example The basic functions of players are mobile and running. BaseAbilityNew features: 1. Damage skill harmAbility; 2. Barrier skill BaulkAbility; 3. Auxiliary skill restorabilityPLAYER 1 increases the damage skill Decorator harm = new HarmAbility (baseAbility );PLAYER 2 increases the damage skill

Php design mode: decorator mode and php design mode. Php design mode: modifier mode. php design mode: modifier mode. you can dynamically add and modify the class function. A class provides a function, if you want to modify and add additional features, php design mode decorator mode, php design mode The modifier mode allows you to dynamically add and modify the class. A class provides a function. to modify

Function summary in python: decorator closure details, python details 1. Preface A function is also an object that can add attributes and use periods to represent attributes. If the definition of an internal function contains a reference to an object defined in an external function (an external object can be outside an external function), an internal function is called a closure. 2. decorator The

Recently write a py script to clean up the document in the computer, which needs to check the characters entered, in order not to make the code verbose, think of using adorners. Search the Internet for an adorner learning document about Python, mainly looking at a blog post from Astralwind, and an article by Limodou. As beginners, these two articles are of great help to beginners, but they are still difficult to understand. So here's a beginner's cognitive record of Python's

[Mode overview] ---------- by xingoo Pattern intent Extension without changing the original class. It is more convenient to dynamically Add a business function to an object than to generate a subclass.Application scenarios 1. If no subclass is generated, add some operations dynamically for the object. 2. Handle unrecoverable responsibilities. 3. When the Child class cannot be used to expand.Mode Structure 　　ComponentExternal interface, used to define the form of external calls. Provides the de

Decorator in python What is a decoration device? Assume that all functions A, B, and C have been compiled. In this case, you find that A, B, and C all require the same function. What should you do? A: decorator The decorator is actually a function, but the return value of this function is a function. In my personal understanding, the