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How to configure the Ruby development environment in CentOS 7, centosruby This article will share with you a tutorial on how to configure the Ruby development environment in CentOS 7 for your reference. Here is a detailed introduction: Install Ruby 2.2 The Ruby version in the CentOS7 repository is 2.0, but if necessary

send message to object display We can send a message directly to the object: Ruby Code Copy Code code as follows: Class HelloWorld def say (name) Print "Hello,", name End End HW = Helloworld.new Hw.send (: Say, "world") We usually use Hw.say ("World"), but send can work on private methods. Not only so send can make the program more dynamic, let's take a look at an example: We have defined a class person, and we want

A local variable starts with a lowercase letter or an underscore (_). Local variables do not contain nil values like global and real variables before initialization. Ruby> $foo Nil Ruby> @foo Nil ruby> Foo ERR: (eval): 1:undefined local variable or method ' Foo ' for Main (Object) The first assignment of a local variable is done much like a declaration. If you

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

Development Environment Construction in Windows This article describes how to build an RoR development environment in a Windows operating system. 1. Remote Installation A. Step 1: download and install the Ruby one-click installation package Download the latest Ruby 1.8.6 one-click installation package for http://rubyforge.org/frs? Group_id = 167. Download the package and run the installation file. The insta

Recently, I need a fast development language. Currently, the hot and fast development languages are Python and Ruby. Ruby and Python are both excellent scripting languages. Although their design philosophy is almost completely different, they are very efficient and have little difference in the application field. It seems that Ruby and Python are naturally compet

Methods In Ruby This article mainly introduces the concept of methods in Ruby, including basic knowledge about method customization and return values. For more information, see The Ruby method is very similar to the functions in other programming languages. The Ruby method is used to bind one or more repeated statemen

Ruby is a language that can be described by sexy. The following describes several iterative operations of sexy.1. Each simple iteration each is a very common traversal operation in Ruby. It is a direct substitute for aging. If you need an index, you can use the each_with_index method. words=%w(good god ruby sexy girl run)words.each do |word|puts wordend 2. Find f

memory, the DOM tree's node is the object form to identify, after the document resolves Wencheng, the document's entire DOM tree will put in the memory. Parsing and creating XML in Ruby The parsing of XML documents in Ruby can use this library Rexml library. The Rexml Library is an XML toolkit for Ruby that is written in a pure

Learn Ruby with me.by TigerNote: This tutorial reproduces free game Pioneer Forum, copyright belongs to the author Tiger.First articleSecond articleFirst ArticlePrefaceI'm going to start learning Ruby from today. What do you say, I haven't seen you? A new person to write a tutorial. With my strong perseverance, scientific self-study methods, as well as my research spirit, I am confident to learn

Recently in the study of using a non-relational database, the document-based database MongoDB is currently being used. Involves manipulating the MongoDB database using Ruby in a Windows environment. It is therefore necessary to install the Ruby development environment in a Windows environment.Follow the steps below:1. First install Ruby to http://rubyinstaller

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.

CentOS6.2 Install Rvm+ruby+rails (1) RVM The official website should be revised once,Using Java code Curl-l https://get.rvm.io | bash-s stable Download and install the RVM stable version. Not using Bash Soon after installing RVM, re-login to a new SSH, using RVM-V to check the version.(2) Install some libraries, compile and install other software or libraries will be used whenJava code Yum Install zlib zlib-devel sqlite-devel

http://www.aqee.net/why-every-programmer-should-learn-python-or-ruby/If you are a student, you should be c,c++ and Java. There will be some VB, or c#/.net. How much you may have developed some Web pages, you know some html,css and JavaScript knowledge. On the whole, it's hard to see how many students have the ability to master a language beyond the limits of these languages. That's a shame, because there are a number of programming languages that make

How to quickly and correctly install Ruby, Rails to run the environment For new entry-level developers, how to install Ruby, Ruby Gems and Rails running environments can be a problem, and this page focuses on how to quickly install a ruby development environment with a plausible path.The secondary installation method

Ruby is a universal language, not just a language for web development, but Ruby's development in Web applications and Web tools is the most common. Using Ruby you can not only write your own SMTP server, FTP program, or ruby Web server, but you can also use Ruby for CGI programming. Next, let's take some time to schoo

PHP and Ruby on Rails both have a large number of loyal fans. Comparing the two is difficult to choose. No matter who wins, it will attract the saliva of other fans. Due to this, developers are hesitant to choose either of them. Although the starting point of this article is comparison, it is not a comprehensive comparison of the dialectical style. No good or bad, suitable for yourself is the best. In fact, comparing PHP with

Programming Ruby Reading Notes, programmingruby In Ruby, you can call constructor to create an object. Song1 = Song. new ("Ruby ") Ruby rarely processes single quotes. Except for a few exceptions, the literal content entered into the string constitutes the value of this string.

Build Ruby on Rails in Ubuntu Ruby on Rails is an open-source Web framework written in ruby., Similar to J2EE and PHP. Ruby on Rails is a very beautiful web development framework and incorporates the essence of agile development:Conventions greater than configurations. You will find that it is really a very beautiful

If you are a student, you should be C, C ++ and Java. There will also be some VB, or C #/. net. You may have developed some web pages. You know some HTML, CSS, and JavaScript knowledge. In general, it is difficult for us to find that some students are able to master languages beyond these languages. This is a pity, because there are many programming languages that can make you a better programmer. In this article, I will tell you why you must learn Python or