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
Source: http://podlipensky.com/2012/06/choosing-web-framework-asp-net-mvc-vs-django-python-vs-ruby-on-rails/How often does emerge from the cubicle to look around, note new faces or new facial expression on old ones? How often does emerge from you technology stacks to consider better another approaches/practices?If you do this rarely–bad for you, you'll miss important changes in your environment, loose the track or even worse– You'll work hard in wrong
Introduction: Ruby is a flexible and dynamic programming language. GTK2 is an open source cross-platform image processing library. Fast Linux Desktop graphics application development through RUBY-GTK2.
Introduced
RUBY-GTK2 is a ruby binding of GTK +. The combination of Ruby
The Ruby language itself has been around for a long time and has not been a fire in the country. Many people just know that there is such a language, there are few people. Any language that insists on the development of 10 years, becomes more and more good, must have its unusual place. Can not be arbitrary to compare the language itself good and bad. But it takes time and demand to really become a popular language. Like Ajax technology, to be honest,
Before you start writing plug-ins, you need to verify that Vim supports Ruby by using the following command to identify:
$ VIM--version | grep +ruby
If the output is empty, your current vim does not support Ruby, you need to recompile, and enable support for Ruby.
By the way, my current environment is:
Why is Ruby on Rails for application development, like Apple on desktop OS?
1.Ruby on Rails is optimized first for people, and secondly for editors and frameworks;
2.Ruby on Rails provides a fairly attractive new choice for web development;
3.Ruby on Rails comes from standard methods and patterns, but it opens up ne
Introduction: Assuming that you are a C + + developer, you need to quickly perform some prototyping with Ruby. When you pick up a ruby reference book (such as pickaxe) or browse the Ruby Web site, you'll see some familiar constructs such as class declarations, thread support, and exception handling. Just when you think you know how
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
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 you a better programmer.In this article, I will tell you why you must learn Python or
Three ways to install Ruby in Ubuntu systemChszs, reprint need to indicate. Blog home:Http://blog.csdn.net/chszsRuby is an open-source, dynamic programming language that has a graceful syntax for building scalable Web applications. Ruby Gems is a great way to enhance the development efficiency of ruby developers.There are several ways to install
Ruby handles strings like numbers. We enclose them in single quotes (' ... ') or double quotes ("...").
Ruby> "abc"
"abc"
ruby> ' abc '
"abc"
Single and double quotes have different effects in some cases. A string enclosed in double quotes allows characters to be drawn by a forward slash, and can be inline with #{} expressions.
Strings that are enclosed in s
Tutorial Requirements
This tutorial requires the following technologies and resources:
A database server
NetBeans IDE 6.0 that supports Ruby
To create a sample database
Note: This tutorial uses the MySQL database server. For information about using a MySQL database server in a Ruby application, see Installing and configuring Ruby support. This document also
To write a CGI script:
The most basic ruby CGI script looks like this:
#!/usr/bin/ruby
puts "http/1.0 OK"
puts "content-type:text/html\n\n" puts "
If you call this script test.cgi upload to a unix/linux web hosting service provider and have the appropriate permissions, you can use it as a CGI script.
For example, if you have a website hosted by a Linux web hosting provider, such as: Http://
Output to: http://robbin.javaeye.com/blog/57474
There is almost no controversy in the MACOs platform, and textmate is used by everyone. However, there are many ides available for selection and use on the Windows platform, but each has its own strengths and weaknesses. Based on all the ruby ide I have used. Ror ide on Windows platforms is mainly divided into two categories: one is a heavyweight full-featured IDE, such as Eclipse, netbeans, ide
Why should O M engineers learn Python or Ruby?
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 th
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