Ruby Global Variables
Global variables begin with $. The value of an uninitialized global variable is nil, and a warning is generated when the-w option is used.
Assigning a value to a global variable changes the global state, so it is not recommended to use global variables.
The following example shows the use of global variables.
#!/usr/bin/ruby
$gl
Ruby is currently the most flexible and agile programming language. It has special application methods and can bring a pleasant programming environment to programmers. Here we will learn the skills for Ruby to get the current class name.
Using pp () to output two-dimensional arrays in Ruby
Ruby on Rails directory fi
The improved Ruby development environment in NetBeans 6.1
The NetBeans 6.1 Chinese version, released early this month, offers a number of new and extended features such as high-performance, JavaScript Editor extensions, Spring framework unification, and Easy-to-use MySQL support. For more information about new and extended features of NetBeans 6.1, see the following:
NetBeans IDE 6.1 Information: http://www.netbeans.org/community/releases/61/index_z
: http://www.baidu.com/ Step 2: enter 'watir' in the search text field. Step 3: click the 'baidu submit' button. Expected Result: A Google page with results should be shown. 'download.csdn.net ' should be high on the list. Actual Result: Test Passed. Found the test string: 'download.csdn.net '.Actual Results match Expected Results. End of test: Google search. Last Step Close IE!!>Exit code: 0
When running the above script, the system prompts "ruby Wat
good query, but a lot of content is too simple to say clearly, and the content is not complete): https://hulufei.gitbooks.io/react-tutorial/content/index.htmlReact official English document: https://facebook.github.io/react/docs/getting-started.htmlReact Chinese document (this document is poor): http://reactjs.cn/react/docs/getting-started-zh-CN.htmlReact Chinese documents provided by the Geek academy: http://wiki.jikexueyuan.com/project/react/Another REAC Chinese document (this is more compreh
Example parsing: Use of Strategy Mode in Ruby Design Mode Programming, rubystrategy
Today, your leader is eager to find you. I hope you can help him. He is in a hurry to go to the meeting. What can I do? You are curious.He told you that there is a user information table in the database of your project, which stores user data. Now you need to perform a selective query of user information. He said that it wil
Example of using Builder mode in Ruby Design Mode Programming, rubybuilder
Let's first review the basic concepts of the design model:DefinitionSeparates the construction of a complex object from its representation, so that different representations can be created during the same construction process.The builder hides how the product is assembled, so if you need to change the internal representation of a pro
, let's create the controller first.
The command line is as follows: Ruby script/generate Controller Hello
This produces a controller that corresponds to the c:/rubydev/first/app/controllers hello_controller.rb
Create an action, which is to modify the contents of the C:/rubydev/first/app/controllers hello_controller.rb file as follows:
Class Hellocontroller def thereEndEnd
Step Seventh: Write the there.rhtml below the/app/views/hello directory, which
Regular expressions are a special sequence of characters that can help match or find other strings or string sets, using patterns that maintain a specialized syntax.
The regular expression literal is a pattern between a slash or any delimiter%r as follows:Grammar:
Copy Code code as follows:
/pattern/
/PATTERN/IM # option can be specified
%r!/usr/local! # General Delimited Regular expression
For example:
#!/usr/bin/
Ruby: a simple example of Binary Search (Binary Search) algorithm.
In computer science, binary search (English: binary search), also known as binary search (English: half-interval search), and log search (English: logarithmic search ), it is a search algorithm used to search for a specific element in an ordered array. The search process starts from the intermediate element of the array. If the intermediate
The following is an example of the Iterator usage in Ruby.
IteratorDefinition
A Ruby iterator is simple a method that can invoke a block of code.
The Block is generally followed by the method, and the code in the block may not necessarily be executed.
If the method contains yield, the Code in its block will be executed.
The Block can receive parameters and
The Observer pattern (sometimes referred to as the Publish/subscribe model) is one of the software design patterns.In this pattern, a target object manages all the observer objects that are dependent on it and actively notifies it when its state changes.This is usually done by calling the methods provided by the various observers.
When implementing the observer pattern, it should be noted that the interaction between the observer and the observed object cannotManifest as a direct call between c
#建立一个222. rb file and enter the character file = File.Open ("222.rb", "w+") file.puts "123\NWADWA\N12124124\NDWDW" File.close #输出222. RB Content Fil
E.open ("222.rb", "r+") do |file|
While line = File.gets puts line end #直接用IO操作文件 Io.foreach ("222.rb") do |line| Puts lines if line =~/abc/#输出匹配到了 ' abc ' of the row where the ' puts ' if line!~/qwe/#输出没有匹配到 ' Qwe ' is the row end #输出文件的绝对路径 puts File.expand_
Path ("222.rb") #count chars from a file file= file.new ("222.rb") W_count = 0 File.each_b
Ruby can also write servlet? Yes, it's not a joke, and it's quite convenient, because the Ruby standard library comes with a webrick, and webrick itself has a serlvet container that can start a web server anytime and anywhere.
Let's take a look at the simplest example and output hello to the browser:
require'webrick'
require'net/http'
includeWEBrick
Use Ruby to write HTML scripts to replace the example sharing of applets.
A file contains the following content:
The function I want to implement is to replace it:
This seems a bit simple, but it took me half a day to implement this function, mainly because I haven't written RUBY programs for a long time, so I am unfamiliar with the API. Secondly, I am familiar
Can ruby write a servlet? Yes, it's not funny, and it's handy, because Ruby's standard library brings a webrick,webrick itself and a Serlvet container, and it's convenient to start a Web server anytime, anywhere.
First look at the simplest example, output hello to the browser:
require 'webrick' require 'net/http' include WEBrick class HelloServlet def hello(resp) resp["Content-Type"]="text/html;chars
Ruby uses the Monkey Patch Monkey Method for program development example, rubymonkey
Monkey Patch is a special programming technique. Monkey patch can be used to dynamically modify (expand) classes or modules at runtime. You can add a Monkey Patch to modify a third-party library that does not meet your needs, or you can add a Monkey Patch to modify errors in the code at zero time.
SourceMonkey patch was fir
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