ruby mixin

[Solid Ruby Basics] Ruby Quick Start, solid ruby Quick Start Address: http://www.cnblogs.com/aiweixiao/p/6664301.html Document outline Scan the public account1. Ruby Installation 1.1) [install Ruby] Ruby installation on Linux/Un

", [Tree.new ("Reia"), tree.new ("Macruby")]) # Access to a node ruby_tree.visit {|node| puts node.node_name} # Access entire tree ruby_tree.visit_all {|node| puts ' node: #{ Node.node_name} "} Let's mention Ruby's naming convention: (1) class adopts CamelCase naming method(2) The instance variable (an object has a value) must be preceded by @, and the class variable (a class has a value) must be preceded by a @@(3) Variable and method names full lowercase using underline naming meth

Ruby is a powerful object-oriented scripting language that allows you to easily and quickly perform object-oriented programming. sometimes using formal object-oriented languages such as Smalltalk, Eiffel, and C ++ to develop small projects seems a little complicated. Ruby can meet these object-oriented programming needs. of course, you can also use Ruby for gener

users have their own data tables. To enable repeated STI, add self. Strict act_class = true to the parent class.Copy codeThe Code is as follows:Class Post Self. abstract_class = trueEndClass GuestPost EndClass MemberPost End Here, GuestPost and MemberPost must have their own Migrations to create guest_posts and member_posts data tables. You can also introduce multiple dependencies in a class.Copy codeThe Code is as follows:Class Dependency Require_dependency 'guestpost'Require_dependency 'membe

Some programming languages (such as C ++ and clos) provide multiple inheritance mechanisms: A class can inherit from multiple superclasses. For example, a house may inherit from a building class (together with the Office and hospital classes) and residence class (together with the apartment class ). Although multiple inheritance may become a powerful feature of a language, many object-oriented languages are not added to it because it increases the complexity and ambiguity of the language.

1. Why Ruby? Why do many Java developers focus on Ruby? Ruby is a general-purpose scripting language created in Japan 10 years ago. It is a pure object-oriented language. Unlike Java, everything in ruby is an object. Ruby syntax mainly comes from smalltalk, Python and Ada.

Keywords: Ruby on Rails, instantrails, windows, getting started, tutorial I always wanted to try Ruby on Rails, but I was not familiar with Apache and MySQL, and I was not confident in setting up the rails environment. So I never started. After learning about instantrails, finally, we set up the Ruby on Rails Development Environment on Windows and started learni

Demonstrate Ruby's six characteristics that are easy to be misunderstood with actual code. The Code demonstrates ruby misunderstanding. Introduction: if you are a C ++ developer, you need to use Ruby to quickly execute some prototype designs. When you pick up a Ruby reference book (such as Pickaxe) or browse a Ruby web

Ruby is a powerful object-oriented scripting language that allows you to quickly and easily object-oriented programming. Sometimes it's a little "fuss" to develop small projects using formal object-oriented languages such as Smalltalk, Eiffel, or C + +. And Ruby just meets the needs of these object-oriented programming. Of course, you can also use Ruby for genera

Add fire to Ruby: Ruby will become popular again Ruby, which is widely regarded as a web language, has always been very popular, but it will become more popular now. AltRubies pushed Ruby to a level we never imagined. Is Ruby the preferred choice for browsers, mobile apps,

Tutorial on system management by writing scripts in Ruby, and ruby System Management Introduction Ruby is an extremely rich, free, simple, scalable, portable, and object-oriented scripting language. Recently, it is widely used in the Web field. To a certain extent, this is attributed to the very powerful Web application development framework Rails, Which is exact

Ruby on Rails Session 1: How to Build a Ruby on Rails on the Ubuntu., railsubuntuAbout Ruby on Rails Ruby on Rails is an application stack that provides developers with a framework to quickly create a variety of web applications. ruby on Rails does take a little while to ins

The tailor made for the Basix users among. If you've been itching to try out Ruby and/or Rails, if the Terminal are somewhat new to you, your may find that even the PR Ocess of installing it can generate countless confusing errors. This article would detail the exact steps you need to follow for get Ruby up and running on your Mac. Step 1-RVMWhat are interested to know are that

Detailed tutorial on connecting to the database in Ruby program, ruby Database This section describes how to use Ruby to access databases. The Ruby DBI module provides database-independent interfaces similar to the Perl DBI module for Ruby scripts. DBI is the Database indepe

Detailed explanation of the iterator IN Ruby and the Ruby Generator D guago recently wanted to build a website. In addition, he had long had the idea of learning a dynamic language. Among the programming languages that meet two conditions, Ruby and Python are the most appropriate. Now Ruby on Rails is booming! Therefor

Understand Ruby scopes and Ruby scopes What is scope? When talking about the scope, you should immediately thinkVariableAndVisibilityThese two words,VariableAndVisibilityIt is the main content of the scope. Yes, the scope is about where the code variables are visible. After you fully understand the scope, I will give you a piece of code, you can easily know what variables are visible at this time, and most

The concept of class objects in Ruby and the concept of ruby objects Object-oriented Programs involve classes and objects. A class is a blueprint created from an individual object. In object-oriented terms, we say that James's bicycle is an object instance called a bicycle. Example of any vehicle. It includes wheel, horsepower, fuel or gas tank capacity. Data members of vehicles with these features. These f

Ruby implements two mail sending methods, and ruby implements mail sending. In fact, as long as you are willful, you can use telnet to send emails. However, this cat is not so capricious. We should use the KISS Principle to send emails. This blog post only describes how to send emails, but does not involve email receiving. If you have the opportunity to open a separate blog post in the future.

Ruby basic syntax getting started tutorial, ruby basic syntax tutorial Let's write a simple Ruby program. All Ruby file extensions are. rb. Therefore, put the following source code in the test. rb file.Instance #!/usr/bin/ruby -wputs "Hello,

Most Ruby programs, their design, logic, and action, are all centered around objects. The main task of writing a Ruby program is to create objects and then give them the ability to perform actions. Ruby is an OOP language, an object-oriented language in which you perform calculations, data processing, input, and output by creating objects and then letting the ob