Ruby

1. Check whether the private method can be inherited. Class A @ name = "anleb" def ask puts @ name end private: askenda =. new #. aska. send (: Ask) Class B Conclusion: for private methods, class variables (similar to static variables,

Ruby is a dynamic language that allows you to change the class definition at any time. For example, if a class already exists when we define it, the definition at this time is to append the previous class, rather than re-define it.   Code

1. Establish an HTTP connection (Send request parameters through get) Require "open-Uri" # Write the GET Request Parameters in the uri url uri = 'HTTP: // URI 'html_response = nil open (URI) do | HTTP | html_response = http. read end puts

When we talk about inheritance, we usually separate them into interface inheritance and implementation inheritance. For single inheritance, it is easy to understand and use both implement inheritance and interface inheritance. Even so, in C ++'s

• First and foremost, run your scripts with warnings enabled (the-W command-line Option ). • If you happen to forget a "," in an argument list-especially to print-you can Produce some very odd error messages. • A parse error at the last line of the

Ruby is a dynamic scripting language that everyone knows. The problem I want to discuss today is the exception handling mechanism in ruby.Code: Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--> 1

I switched the development environment to Ubuntu last night. I felt the atmosphere. I used to develop it in Linux and then switched it to Windows for DOTNET development. Now we can see that Ubuntu has been upgraded to 7.04, which is a great

The full name of yarv is yet another Ruby Vm, which is another Ruby Virtual Machine implemented by Sasada Koichi. At present, Ruby's virtual machine is completed through AST (Abstract syntax tree), which is slow and can only be used for pure script

Discuss and solicit opinions: Cause :Ruby can greatly improve the efficiency of developers, but it takes a long time to learn it. Maybe a language cannot be perfect, but we need to make it as perfect as possible. To develop a plug-in system, you

Ruby processes single quotes and double quotes differently. (1) double quotation marks can be applied to escape characters (2) strings in double quotation marks can be replaced by # {varname}. For global variables or instance variables, the {}

When a method ends, we may need to clean it up. maybe an open file needs to be closed, and the data in the buffer zone should be cleared. if there is always only one exit point for each method, we can safely clean up our CodePut it in one place and

The explanation is good. It should be clear a lot. Ruby symbol details Cause Recently I have been studying Ruby on Rails. It is indeed an excellent database development framework. However, a large number of statements similar to the following are

Because the current Ruby does not support Unicode, Chinese-related processing has been vague in ruby, which is basically the path of their respective attempts. I also listed some ideas to help me sort out their own ideas. Utf8 and Unicode UTF is

Program: 1: formula (that is, code line, haha)2: Termination of the program Programs are composed of sub-statements. Use semicolons (;) or line breaks (;) to distinguish between formulas and formulas.In the middle of a row, separate them with

Refactoring (Ruby Version) Basic Information Original Title: refactoring: Ruby EditionOriginal Press: Addison-Wesley professionalAuthor: (US) Jay fields Jon Harvie Martin Fowler [Translator's introduction]Translator: Xu Xuming [same translator's

As you know, ruby strings are called first-class objects and use a large number of query and operation methods. A basic string operation is to split a string into multiple sub-strings. If you have a string, such as "foo, bar, baz", and you want the

If a model object has an attribute named balance, you can use the index operator to obtain the value of this attribute. You can use a string or tag. Here we use a tag, for example: Account [: balance]#=>Get value Account [: balance] = 0.0#=>Set

The JRuby community recently released the latest version of JRuby 1.6.5. JRuby is a 100% pure Java implementation of the Ruby programming language. It integrates Ruby's concise syntax and a wide range of Java class libraries. According to

Git repository outputGit archive -- format = tar -- prefix = actasfavor/HEAD | (cd/home/holin/work/& tar xf -)Output to the/home/holin/work/actasfavor/directoryPosted by holin At May 16,200 8Load controller and model in plugins# Include hook code

Let's write a function to calculate the factorial. The mathematical definition of the factorial is as follows:N! = 1 (when n = 0)= N * (n-1 )! (Other Cases)In Ruby, you can write as follows:Copy codeThe Code is as follows:Def fact (n)If n = 01ElseN *