Ruby

File structure rules1. If a rubyProgramContains a "shebang" comment, which is the first line. #! Note: to indicate how the (UNIX class) operating system executes the file.2. If a ruby program contains a "coding" comment and does not contain a

6.1 expression Primary Expression Numbers and strings are basic expressions. Specific Keyword: True False nil self The reference to variables is also a basic expression. The result of their evaluation is the value of the variable to which it

You need to install a bunch of gems locally since the Remote Installation didn't work or at least not stably.   By assumption that instantrails2.0 is ready on your xp platform, then you cocould go on the following steps:   1 download netbeans6

The company uses its own proxy to access the Internet. Therefore, when rubygem is used, we cannot directly install the required packages, such as rails. On the internet, we checked a lot of methods for gem to use proxy, many people write that gem

Development Environment: RUBY: 1.9.1 Rails: 2.3.5 RAKE: 0.8.7 Rack: 1.0.1 MySQL: 5.0.9 Ruby-MYSQL: mysql-2.8.1-x86-mswin IDE: rubymine2.0.1   Database preparation: Database: dbdevelopment User: Crystal Password: Crystal   1. Create the ruby project

Development Environment RUBY: ruby1.9.1 Rails: rails2.3.5 MySQL: mysql5.0.9 Driver: mysql-2.8.1-x86-mingw32.gem IDE: rubymine2.0.1   1. Create a data table users Use the scaffold tool that comes with rubymine to create a data table users. You can

Development Environment RUBY: ruby1.9.1 Rails: rails2.3.5 MySQL: mysql5.0.9 Driver: mysql-2.8.1-x86-mingw32.gem IDE: rubymine2.0.1   1. Create view/login Create login.html.erb;index.html.erb;loginfail.html. ERB under view/login. The login.html. ERB

Ruport Official Website: http://www.rubyreports.org/ This example introduces the simple development of Ruby reports.   Development Environment OS: Windows XP RUBY: ruby1.8.7 Rails: rails2.3.5 MySQL: mysql5.0.9 IDE: rubymine2.0.1   1. Install

Development Environment: OS: Windows XP RUBY: ruby1.8.7 Rails: rails2.3.5 MySQL: mysql5.0.9 IDE: rubymine2.0.1   1. Create productaggragator to implement data extraction logic. In this example, some parameters of product. report_table are

Chinese garbled characters: 1. The. html. ERB file in the viewsdirectory directly writes Chinese characters and displays garbled characters in the browser. 2) The Chinese characters saved to the MySQL database are displayed normally on the

In ruport, The pdf_writer does not support Chinese characters, and the output Chinese characters are garbled. I checked a lot of information online and did not find a good solution. I had to check the source code. Why does the PDF tool provided by

This example is based on Ruby ruport practice-simple report system and Ruby ruport practice-Chinese PDF report prawn, and adds the design and implementation of report parameters.   1. Create a data table report_parameters Create Table

This example is based on the ruby ruport practice-Report parameter implementation to implement addition, deletion, and modification of table parameters when the report is executed and defined. 1. Modify views/report_executions/edit.html.

Development Environment: RUBY: ruby1.9.1 Rails: rails2.3.5 IDE: rubymine2.0.1 Flex builder: Flex builder4   Development ideas: 1) create a flex project in flex Builder 2) create a rails project in rubymine 3) Copy swfobject. js compiled under the

Last year, the two most popular technologies were integrated: Ajax and Ruby on Rails. They became the focus of discussion at the serverside Java seminar in Las Vegas last weekend. In fact, you can say Ruby and Ajax have been officially

Transferred from [foreverphoenix column] Number 1. Ruby supports integers and floating-point numbers. An integer can contain any length. An integer within a certain range is an object of the fixnum class. Integers out of the range are stored in

Some people said that the ninth chapter of the metaprogramming routines are not easy to understand. I apologize for the lack of ability to show all aspects of metaprogramming, so I chose to demonstrate the simplest metaprogramming without explaining

Document directory Three methods for running Ruby: Comments and branches Keywords Identifier Data Type Operator Basic statement Exception   Three methods for running Ruby: Ruby-e 'Ruby statement' Ruby source file Irbirb is a ruby

Document directory Overload? Super Class variable (static variable) Class Method (static method) Singleton Method Access Control   Overload? Ruby supports default parameters, but there is no method overload in ruby. Ruby supports

Abstract: programming requires more knowledge, experience, judgment, and so on, which will not degrade due to age growth. In other words, programming can be done for a lifetime. This is slightly different from those of professional sports players.