Ruby

Class Mysqltest #Code here require "MySQL" Def testmysql dbc=mysql.real_connect (' localhost ', ' root ', ' 123 ', ' Ivic_porta L ') res=dbc.query (' select * from Virtual_machines ') puts "Test Mysql ...." While Row=res.fetch_row do puts "# {row[0]}

Ruby InstallationInstalling Ruby from source code under Windows is a very hard errand that can be http://rubyinstaller.org/from theor http://railsinstaller.org/ download the packaged installer. Ruby Configuration Configuring environment

According to "Ruby on Rails" and I learned the route map, we know that can be accessed GET /posts/ :id (. :format ) to display specific objects.1. Modify the actionModify the APP/CONTROLLERS/POSTS_CONTROLLER.RB show this action. Here's a puzzle,

Class LanguageDef initialize (name, creator)@name = Name@creator = CreatorEnddef descriptionPuts "I ' M #{@name} and I were created by #{@creator}!"EndEndRuby = Language.new ("Ruby", "Yukihiro Matsumoto")Python = language.new ("Python", "Guido van

Insert data at sixteen o'clock P.M.. The displayed created time is. I started to set the time zone in application. RB.Config. time_zone = 'beijing'After investigation, change it to config. active_record.default_timezone = 'beijing' to display the

When Ruby is used in netbeans, all Chinese output is garbled. The solution is as follows:Find the etc directory in the installation directory of netbeans, open the directory, and then open the file in netbeansAdd an option to the netbeans. conf

Directly run the Code: Module action def jump @ distance = rand (4) + 2 puts "I jumped forward # {@ DISTANCE} feet! "Endendclass rabbit include action attr_reader: Name def initialize (name) @ name = Name endclass cricket include action attr_reader:

Ruby-inherited syntax class DerivedClass Override Concept Sometimes, we want child classes to inherit from the parent class to do different things from the parent class, so we need to rewrite the method in the Child class. For example, you have a

Sometimes, when you look at the source code, you can see that there is a The parent class of the class is module, module. Methods. grep (/   The matched result set is: [: , E. gMoD Returns true ifMoDIs a subclassOther. ReturnsnilIf there's no

SELF: indicates the current object or default object in ruby. At any time of program execution, there is only one self.   1. Who is self and where is self? To know which object is self, you must know the current context. The context mainly includes

The supplemental version of ruby-based watir automated test Note 1 adds some special control capture methods. Updating ....   Attribute_value Obtains the properties of the current control. Value = ie. Link (: Id => 'xxx'). attribute_value ("href ")  

In Ruby, callback and hook methods are called when a specific event occurs. There are several types of events: Call a method that does not exist. Class mixing includes a module Define subclass of A Class Add an instance method to the class Add

Recently I have studied SVN using the HTTP protocol, but most of them are using Apache to integrate SVN on the Internet. I don't want to use Apache + SVN. I finally found many pages on Google, but it is required to install Ruby on Rails first, so we

Cloud foundry is the first open source PAAs in the industry. it supports multiple frameworks, multiple services and multiple cloud providers. bosh was originally created in the context of the cloud foundry project. nevertheless, it is a general tool

A function implemented by PHP to save remote files to a local device, Recently, I encountered a PHP Remote Image local problem. I checked the manual and found that file_get_contents () and file_put_contents () can solve this problem. The idea is

String processing functions1. Return the length of the string str.length => integer   str.include? other_str => true .include? .include? .include? ?h   3. String insertion: str.insert(index, other_str) =>.insert(0, ) .insert(3, )

BKJIA Translation: Nginx has become the third largest Web server in the world. Among the top 10 Web servers used by domestic websites, Nginx is also among the top. Ruby on Rails is a new generation of Web development languages that have become

The JRuby community recently released the latest version of JRuby 1.6.5. JRuby is a 100% pure Java implementation of the Ruby programming language. It integrates Ruby's concise syntax and a wide range of Java class libraries. According to

[Comprehensive] Ladder algorithm and ladder Algorithm  Target Today, I heard people say that the ACM team of a school has developed a Rating System, which is similar to the Rating of TopCoder and Codeforces. the intuitive points are more likely to

I suddenly found that ruby is also good, and I want to learn it.IntroductionThis is a short Ruby entry, and it takes only 20 minutes to complete. Here we assume that you have installed Ruby. If you have not installed Ruby, visit the official Ruby