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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
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
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
Address: http://www.linuxidc.com/Linux/2010-12/30380.htm Ubuntu is updated with Ruby and rails, but not the latest version. The ruby version is about 1.9.1, but rails version is only 2.3.5, Which is outdated, so you have to download the latest version.Source codeCompile and install. 1. Prepare the library used for installation $ Sudo apt-Get install GCC g ++ build-essential libssl-dev li
From the example we demonstrated above, you may be surprised that the ruby we declared earlier is an object-oriented language.So we can prove it through this chapter. We will introduce how to use Ruby to create classes and objects, and introduce what Ruby is more powerful than most object-oriented languages.Let's implement one million dollar product step by step,
Ruby, as a powerful and flexible programming language, has been used by many programmers. They have gained great benefits in the use process. Today, we will introduce one of the following skills: Ruby's application skills for configuring Mysql DBI. Parse Json IN Ruby Ruby module Win32API calls win32API directly How to call win32ole IN
Ruby on Rails (also called Rails) is a Ruby Framework for Internet applications that support databases, what are the core features of Ruby on Rails and the articles into the world of Ruby on Rails reported before BKJIA?" This article focuses on how to optimize the performance of Ru
Ruby is a common language, not just a language applied to web development, but Ruby's development in Web applications and Web tools is the most common. With 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
In fact, as long as you capricious can, with Telnet is also able to send an e-mail. But the cat is not so capricious, or use the KISS principle to send mail it. This blog post only describes how to send e-mail, but does not involve the mail, the future if the opportunity to open a separate blog introduction. Ruby has 2 ways to send mail via SMTP, one of which is sent directly with NET::SMTP, compared to the bottom. If you want to send an attachment,
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 If you are a student, you should be C
Install Ruby in iOS Mac A series of questions raised by EasyIOS: the installation and use of CocoaPods in the previous article explains why cocoapods is used, but cocoapods needs a Ruby environment to be installed, to install the Ruby environment, you must first install Xcode (because of the xcode development tool, which helps us install the Development Kit requi
Out of curiosity about Ruby, good morning. Let's take a look at it. The syntax is concise and it's a good language, Have time to learn more Http://www.ruby-lang.org/zh_CN/documentation/ help documentation --- The following installation configuration is reprinted I. Preparations before installation: 1. Download RUBY: http://www.ruby-lang.org/en/downloads/ 2. Download RDT (
We are preparing to build a ruby development environment because we are interested in Ruby recently. Feel the power of Ruby. Some problems have been encountered during the environment setup process. We have recorded the problems in the following article and offered our solutions. Before getting started, I am using the environment
Both PHP and Ruby on Rails have a large number of their own loyal fans. Comparing the two is a difficult choice in itself. Whoever wins will attract the saliva of the other's fans. By this effect, developers often seem hesitant to choose between the two. Although the starting point of this article is a comparison, it is not a one-sided-style singing and singing, but a dialectical synthesis of contrast. No good or bad, suitable for their own is the bes
Ruby supports a modern language of a rich array of operators. Most operators are actually method calls. For example, A + B is interpreted as a, + (b) The method of the object referenced by the variable is called a parameter with B as its. For each operator (+-*/% * * | ^ Ruby Arithmetic operators: Assuming variable a=10, variable b=20: Ruby com
Loops in Ruby are used to perform the same number of times as the code block specifies. This chapter details the looping statements that are supported by Ruby.Ruby While statement:Syntax: While conditional [do]CodeEnd Executes code when the condition is true. The while loop condition is a reserved word in the code, a newline, a backslash (\), or a semicolon separated.Instance: #!/usr/bin/ruby $i
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