Ruby

Please considerCode Class TestPrivateDef self. TestPuts 'arst'EndDef TestPuts 'arst'EndClass Def Test2Puts 'arst'EndPrivateDef test3Puts 'arst'EndEndEndTest. TestTest. Test2BeginTest. test3Rescue standarderror => EP EEndBeginTest. New. TestRescue

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

  Around_filter: around_action_filter Protected Def transaction Ret = true Activerecord: Base. Transaction do Begin Yield if block_given? Rescue exception => ex Set_notice (ex. Message) Ret = ex. Message Raise activerecord: rollback,

Using built-in database functions in Ruby to call orcale database is more troublesome, but fortunately the Open Source of the East expansion is very good, we can use the open source components of ruby-oci8 to orcale database for a series of

The ruby method can accept code blocks as parameters, which is a very flexible method and a very good design idea. Suppose there are three methods as shown in 1: Figure 1 As shown in figure 1, a large number of code blocks of method A, Method B, and

It has been more than two months since I started to learn Ruby language dependencies. I feel that I have never gained a lot. I even read all the ruby language learning tutorials, however, there is always a sense of no way to start.   Ruby can also

Use couchrest_model: Https://github.com/couchrest/couchrest_model 1. Modify gemfile and add: gem 'couchrest_model' Then run bundle install. 2. Run rails generate couchrest_model:config Generate the couchdb. yml file in the config directory, Then

Read "Open Source Base Camp" to see this section. Just give it a try. First, go to the Internet to down the installation files to be used, as shown below:Http://rubyforge.org/frs/download.php/12751/ruby185-21.exeHttp://rubyforge.org/frs/download.php/

In the university, a book is often placed in the course seat the night before, indicating that the position has been occupied. The next day, I came to this seat and opened the book for formal classes. in this phenomenon, Books Act as

I recently read the basic syntax section of [ironruby unleashed feb.2010] and found that "use a different..." appears in many places in the book. Indeed, many basic operations in Ruby provide many methods/aliases, and many odd syntax (sugar ). In

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

Restful embodiment ---- Resource Of course, it seems quite narrow to put restful and resource together. In rails, actioncontroller: Resources abstracts resources in rest. Here, I will not talk about the concept of rest, A huge amount of online

Use will_paginate for paging and simple query Run the gem install will_paginate command on the command line. The following result shows that the installation is successful.   Open books_controller.rb (your own Controller) Comment out all the methods

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

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

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

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

Document directory Ruby class Class inheritance Polymorphism Dynamic Language Encoding   Ruby class The first letter is capitalized. The instance variable name starts with @, and the method name and parameter name start with a lowercase

  Development test cases)1. Open the editor2. Use. RB as your file extension3. Write "require 'watir'" in the first sentence of the test file to ensure that the watir tool is accessible.4. Open the browser and go to the application to be

Ruby development configuration method:1. Before you start using Ruby, you must install (or verify that you already have) the Ruby interpreter and library, and Ruby development environment. Download: ruby186-25.exe2. Download the Eclipse plug-in: