ruby splat

Ruby on Rails (also known as rails) is a ruby framework for Internet applications that support databases. I've now used Rails for two different applications and involved two other associated programs. For the upcoming new book Java to Ruby (see Resources), I've interviewed a lot of Rails developers (those who have succeeded and failed on that framework), the foun

What is an accessor?We've discussed the real variables before, but not too much discussion. The real variable of an object belongs to its property and is a general difference from other objects from the same class. It is important to read and write its properties; This requires a property accessor (attribute accessors) Approach. We will soon see that we do not always have to explicitly write accessor methods, but let us now understand all the details. The two types of accessors are write (writer

Go to Script/consle after upgrading Ruby and Rails: Copy Code code as follows: /usr/local/lib/ruby/1.8/irb/completion.rb:10:in ' require ': No such file to load-ReadLine (Loaderror) From/usr/local/lib/ruby/1.8/irb/completion.rb:10 From/usr/local/lib/ruby/1.8/irb/init.rb:252:in ' require ' From/usr/local/l

Ruby offers a conditional structure, which is common in modern programming languages. Here, we'll explain all of Ruby's conditional statements and modifiersRuby If...else Statement:Syntax: If conditional [then] code ... [elsif conditional [then] code ...] ... [Else code ...] End An if expression is used for conditional execution. The value false and nil are false, and the rest are true. Note that

Install Ruby, Rails runtime environment, and rubyrails quickly and correctly How to quickly and correctly install Ruby and Rails runtime Environments For new entry-level developers, installing Ruby, Ruby Gems, and Rails running environments may be a problem. This section describes how to quickly install the

Instructions on how to use the XML data processing database REXML in Ruby, rubyrexml Use REXML as a treeThe purpose of REXML is to be enough. To the maximum extent, it can complete tasks well. In fact, REXML supports two different styles of XML Processing-"Tree" and "stream ". The first style is the simpler version used by DOM; the second style is the simpler version used by SAX. Let's study the tree style first. Suppose we want to extract the same ad

Several programming skills for accelerating Ruby on Rails, rubyrails Ruby is often praised for its flexibility. As Dick Sites says, you can "Program for programming ". Ruby on Rails extends the core Ruby language, but Ruby itself makes this extension possible.

Tutorial on installing the Ruby interpreter on the operating system. Ruby installation-LinuxThe steps for installing Ruby on a Linux machine are listed below.Note: before installation, make sure that you have the root permission.Source code InstallationDownload the latest Ruby compressed file. Click here to download.Af

What is the ruby language? 1. IntroductionRuby is written by Yukihiro Matsumoto in Japan. It is a simple and easy-to-learn object-oriented scripting language. Like perl, ruby has rich functions such as text processing and system management, but Ruby must be simple, easy to understand and expand. It is similar to python, but it is far from famous in China.

Ruby processes strings like numbers. We enclose them with single quotation marks ('...') or double quotation marks. Ruby> "ABC""ABC"Ruby> 'abc'"ABC" Single quotation marks and double quotation marks have different functions in some cases. A string enclosed by double quotation marks allows a character to be led out by a front slash, and can be embedded with

The concept of class objects in Ruby This article mainly introduces the concept of class objects in Ruby, which is the basic knowledge of Ruby learning. For more information, see Object-oriented Programs involve classes and objects. A class is a blueprint created from an individual object. In object-oriented terms, we say that James's bicycle is an object instan

Detailed descriptions of hook methods in Ruby This article mainly introduces the detailed explanation of the hook method in Ruby. This article explains what is the hook method, extended, extended, prepended, inherited, and so on in included, Devise, for more information, see Ruby's philosophy is based on a basic element, that is, to make programmers happy. Ruby p

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

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 comparison operat