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I have recently considered a lot of metaprogramming (metaprogramming) issues and would like to see more examples and explanations of this technology. For better or worse, Metaprogramming has entered the Ruby community and is a standard way to accomplish various tasks and simplify code. Since I can't find this kind of resources, I'm going to start writing some general Ruby technology articles. These may be u

PHP IDE, the cost, in the code auto-completion, generation, prompting, debugging functions are very powerful. PDT is a castrated version of Zendstudio, which can be compared to Zend Studio: Http://www.zend.com/products/studio/comparisonDisadvantages Zend Studio's support for Html/css/javascript is not very good, although Zend Studio has supported Html/javascript from Zend Studio9, but it still has a weaker function, such as CSS selectors cannot be au

Four Methods for Equality judgment in Ruby and four methods for ruby equality judgment It has long been known that ruby has four equality judgment methods: "=", "=", and "equal ?" And "eql ?", It is used in common programs, but I feel that I lack a deep understanding of it. When I read some of the rails source code today, I cannot determine the meaning of one of

We strongly recommend that you use the following Online Learning Websites: http://tryruby.org: Ruby returns the last value in the method by default. To return multiple values, you can use an array. You can return a value by forcibly declaring return. The basic output method is to use puts (output line) and print (print directly ). The Basic Input Method is gets (read a row that contains '\ n' at the end of the row, which can be eliminated by cho

Basic Learning notes for Ruby metaprogramming and ruby learning notes Note 1:The Code contains variables, classes, and methods, collectively referred to as language construct ). # test.rbclass Greeting def initialize(text) @text = text end def welcome @text endendmy_obj = Greeting.new("hello")puts my_obj.classputs my_obj.class.instance_methods(false) #false means not inheritedputs my_obj.instance_variable

Assignment related operations in Ruby programming and ruby programming assignment In earlier versions of Ruby, the return value of the value assignment statement is the return value of the method that sets this attribute. In Ruby1.8, the value of the value assignment statement is always the value of the parameter, and the return value of the method is lost. class

A Date and Time Processing tutorial in Ruby and a date Processing tutorial in ruby The Time class is used in Ruby to represent the date and Time. It is based on the system date and time provided by the operating system. This type may not represent the date before or after January 1. This tutorial will familiarize you with all important concepts of date and time.C

Analysis of Ruby source code layout and programming style, analysis of ruby source code Layout Use the UTF-8 as the source file encoding. Each indentation level uses two spaces (also known as soft tabs). Do not use hard tabs # bad - four spaces def some_method do_something end # good def some_method do_something end Use Unix-style line breaks. (* Users of BSD, Solaris, Linux, and OSX are covered

that supports Maven, refactoring, and Version Control (supports CVS, Subversion, GIT, Mercurial, and ClearCase ), it is also published under the dual protocol consisting of the general development and release protocol (CDDL) v1.0 and the GNU General Public protocol (GPL) v2. NetBeans can run on Microsoft Windows, Mac OS X, Linux, Solaris, and other platforms compatible with JVM. Https://netbeans.org/ 2. Eclipse Eclipse is a free Java IDE mainly writt

Select Mac > Linux > Windows If you can, it's best not to toss Rails under Windows, and you'll waste a lot of time solving some puzzling problems that might never happen under Linux or MAC. Development tools Select Mac under the TextMate, because free; second Sublime Text 3; Macvim again, and finally an IDE rubymine. Sublime Text 3 or VIM is recommended under Linux and Windows, and can also be used with rubymine.

By: Wu Yindate:2007-09-07version:0.5Email:lazy.fox.wu#gmail.comHomepage:Http://blog.csdn.net/wooinCopyright: The article is copyrighted by Wu Yin and his lovely wife, Little bun. may be transmitted and reproduced at will without any commercial purpose. Any act of this article shall be subject to the consent of the author for commercial purposes.Contact Way: lazy.fox.wu#gmail.com 1 written in front Linux programming has been criticized for the point is: There is no good

faster than other development tools. "The most comprehensive browser compatibility data, mobile App development, and many other features are also areas where HBuilder is better than competing products," said Wang. HBuilder with "fast" as its core introduces the concept of "shortcut key Syntax", which cleverly solves the problem that many developers cannot remember too many shortcut keys. Developers only need to remember a few syntaxes to quickly achieve jump, conversion and other operations. Fo

Ruby learning plan-(0) preface, ruby Preface Preface Currently, C, C ++, Java, Object-C, and Swift programming languages have been used. The most familiar language is oc. After all, it depends on him for dinner. It is only a beginner's path for other languages. Because he has been engaged in iPhone app development, recently, I wanted to develop a project by myself, but there was no backend, so I was so

Global variable $ XX Object variable @ xx Local variable [A-Z] xx Constant [A-Z] xx Two pseudo variables self and nil:Self is actually a global variable pointing to the current object. The value of this variable is controlled by the interpreter and can only be read and cannot be modified.Nil is also a global variable controlled by the interpreter and cannot be assigned a value. 1. Global variable $ XXGlobal variables should be used with caution because their scope is script-level and can

Example of writing code for exception handling in Ruby, and ruby Exception Handling A single exception uses the fail keyword only when an exception is caught and thrown repeatedly (because you do not fail here, but are accurate and intentionally throw an exception ). begin fail 'Oops' rescue => error raise if error.message != 'Oops' end Do not specify an accurate RuntimeError for fail/raise. # bad

Tutorial on interrupt and return in Ruby programming and tutorial on ruby programming usage The use of the return, break, and next keywords involves the issue of jumping out of the scope. Their difference lies in the different scopes of different keywords jumping out, because there are code blocks, you need to pay special attention to them.ReturnCommon Methods Generally, the return statement is the same as

Example parsing for Hook methods in Ruby and ruby hook instance Parsing By using the Hook method, we can intervene in the life cycle of Ruby classes or modules, greatly improving programming flexibility.The following hook methods related to lifecycle are available: Classes and modules Class # inherited Module # include Module # prepended Module # extend_

Let's get back to our jukebox for a moment (remember the jukebox ?). At some point We'll be working on the code that handles the user interface-the buttons that people Press to select songs and control the jukebox. We'll need to associate actions Those buttons: press START and the music starts. It turns out that Ruby's blocks are A convenient way to do this. Let's start by assuming that the people who made Hardware implemented a Ruby extension that gi

1. Debug comment Print output debugRuby is an interpreted language, a script, and on Linux, scripts cannot be executed in three ways:1. Run the script with the interpreterInterpreter script FileThat is:Ruby script File2. Run the script directlyIn the script file, use the#! Script InterpreterDefine the script interpreter path, then grant the script execute permission, then run directly./script FileCan.3. Run the script inside the interpreter[Email protected]:/home/ywt/ror_tests/ruby_tests# irb