Ruby

This is the second of the productive Java with Ruby series, and I would like to share with you a basic understanding of how to use Ruby for unit testing, and from here I will discuss some of the high-level topics that use Ruby for unit testing.

Many times we will find that the real production environment is not a lot of external network, only intranet environment, this time we need to install Ruby, we can not provide the Yum command to install online, this time we need to download the

First, install the system needs the packageInstall the Xcode development tool, which will help you install the development packages required for your UNIX environmentOpen the App Store, search Xcode, the first is, yes, there are 4 more g, speed if

Link: http://heatware.net/linux-unix/how-to-install-ruby-1-8-7-centos-5-5/ Have you ever tried to run the yum install Ruby command on centos 5.5? If you use the default application library configuration, you will find that you have installed Ruby 1.8

The download and installation of Ruby on Rails and the establishment of development environments should be based on Ruby to develop applications. Program You must install Ruby, Gem, rails, and mongrel. First, download the latest Ruby one-click

  [Root @ localhost Ruby] # gem install passenger -- preError: Error installing PASSENGER:Passenger requires fastthread (> = 1.0.1, runtime) Solution: Download   Copy the file to the current directory and execute: Gem install fastthread-1.0

Array and hash table Ruby arrays and hash tables are index sets. Both objects are saved and can be read by keys. The key of the array is a number, but the hash table supports the object as the key. They all grow with the addition of new elements.

To install Ruby, go to the ruby official website to download the Windows Installation Package of ruby1.56. After installing Ruby, open the DOS window and enter ruby-V to display it. Ruby 1.8.6 (patchlevel 0) [i386-mswin32] indicates that Ruby

We strongly recommend that you use the following Online Learning Websites: http://tryruby.org: Ruby returns the last value in the method by default. To return multiple values, you can use an array. You can return a value by forcibly declaring

When writing top-level functions in ruby, there will always be a problem: Who is self, who is the method, and what is the method. As follows: 1 p self2 3 p self.class4 5 def talk6 p self7 end8 9 talk Output main, object, main It can be seen that

Recently, there is a need to use a string as a class. For example: There is a string "chinamag" that calls methods under the chinamag Class Based on this string.   Solution: 1. rails can use the constantize method. Pry (main)> 'chinamag'.

Install and uninstall Ruby in Ubuntu In ubuntu12.04, run the following command to install Ruby 1.8 by default.1 $ sudoapt-Get installruby I. The following describes how to install ruby1.9.3 (in some versions of Linux, 1.8 must be installed

1. Prepare the library used for installation $ Sudo apt-Get install GCC g ++ build-essential libssl-dev libreadline5-dev zlib1g-dev Linux-headers-generic  2. Download ruby1.9.2 source code compilation and Installation $ Wget ftp://ftp.ruby-lang.org/

Document directory Aptana Ruby Dltk Ruby Most people are willing to use ide To Write Java and C # code because of Code Completion, intelligent formatting, and even automatic refactoring. In the dynamic language world, the situation is not the

Implementation example of ruby declarative syntax and ruby declarative example ActiveRecord can be easily declared to define the associations between models. For example: Copy codeThe Code is as follows:Class Topic Has_timeout: postsBelongs_to:

Configuration instance for accessing the SQL Server database in Ruby, rubysql To analyze the data stored on SQL Server, you have to study how to use Ruby to access SQL Server. In fact, it is quite simple: Install FreeTDS Download FreeTDS source code

Ruby: Case expression and rubycase expression There are two forms of Ruby case expressions: The first form is similar to a set of continuous if statements: it allows you to list a set of conditions and execute the first statement corresponding to

Six Methods for executing shell commands IN Ruby: rubyshell When we need to call the shell command of the operating system, Ruby provides us with six methods to complete the task: 1. Exec method: The following example shows how to replace the

Jquery shows hidden input objects and jqueryinput objects. 1. Enter an input box when selecting another department # Html $ {item. name} // Js // display the function deptChange () {var deptid =$ ('# deptid') in the input box of other

Tkinter learning-event binding and window, tkinter windowReading directory: Event binding Toplevel component Standard dialog box Event binding: Note: For each component, bind () can be used to bind a function or method to a specific