Ruby

Most of Ruby's built-in types are similar to other programming languages. Mainly have strings,integers,floats,arrays and so on. However, only scripting languages, such as Ruby,perl, and awk, provide support for built-in expression types. Regular

Rexml is a processor written entirely in Ruby, with a variety of APIs, two classic APIs that are distinguished by dom-like and sax-like. The first is to read the entire file into memory and then store it as a layered form (that is, a tree). The

The time object. Time.now returns the current time. 1, time.at Time.at (time[, USEC]) Returns a Time object that is referred to as times. Time can be either an integer or a floating-point number that represents the number of seconds since the

OverviewIf you are engaged in object-oriented development, the implementation of a class or object to increase behavior, the use of inheritance mechanism, this is a basic feature of all object-oriented languages. If a class that already exists lacks

Avoid changing the default ActiveRecord (table name, primary key, etc.) unless you have a very good reason (like a database that is not under your control).Put the macro-style approach in front of the category definition (Has_many, validates, and so

Go to Script/consle after upgrading Ruby and Rails: Copy Code code as follows: /usr/local/lib/ruby/1.8/irb/completion.rb:10:in ' require ': No such file to load-ReadLine (Loaderror) From/usr/local/lib/ruby/1.8/irb/completion.rb:10

Describes a class-like construct: a module. When designing a program, we divide the large components into small chunks, and you can mix and match the behavior of the objects. Similar to classes, modules also bundle methods with constants. What is

Use the String#strip method to remove all spaces The code is as follows Copy Code "Hello". Strip #=> "Hello""Tgoodbyern". Strip #=> "Goodbye" In addition, Lstrip and Rstrip remove the spaces at the left and

Let's take a look at some tips for debugging this time. First, and most importantly, writing test code, writing unit tests and functional tests in rails is simple, using them to reduce the rate of bugs, or to avoid bugs in your previous code. The

The last Test Modeul problem has not been resolved, but the following to continue, this time to test controller. 1. In the test\functional directory, rails has generated a corresponding test file for our controller, and note that

Liberate RoR: Let Activescaffold to manage data entry page Introduction: Save some time, less headaches, use the Ruby on Rails activescaffold plug-in can create pages that are easier to maintain. Activescaffold can handle all the CRUD (create, read,

Array = (1..10). to_a# method 1length = array.length length.times do |t| Print "#{array[t]}" end puts "\ n" # method 2length = array.length-1 for i on 0..length do print "#{array[i]}" C6/>endputs "\ n" # method 3for I in array do print "#

YieldAll "Method (methods)" implicitly follow a "block" parameter.The block parameter can also be given explicitly, in the form of a "&" in front of the parameter, such as DEF fn (Arg1, arg2, &block) end, where the &block is explicitly given the

In Ruby, everything is an object. This is very popular for users who like to use highly object-oriented languages (such as Smalltalk, Eiffel or clos. For example, 1, 2, 3, or 10.8 are all objects, rather than the original type in Java or C ++.

Development Environment: OS: Windows XP RUBY: ruby1.9.1 Rails: rails2.3.5 IDE: rubymine2.0.1 Flash builder: Flash builder4   Background: In ruby-Flex practice-using swfobject to load SWF in a ruby project describes how to reference SWF on the rails

The. vcproj file is no stranger to Visual Studio (VC ++) users, and. vcxproj is released after vs2010, The. vcproj file is changed . Vcxproj. They are all XML-based files, so there are many libraries for parsing them. Here I will use libxml. The

Http://ihower.tw/rails3/index.html       I amIhower, This example describesRuby on RailsThis set of original website development frameworks depends on2011Published in the second half of the year. If you have any comments or survey Suggestions, do

Ruby-implemented image filter algorithm code, ruby-implemented Filter Algorithm Source image I. grayscale Algorithms The color values of each pixel in a color photo are composed of three values: Red, green, and blue. The values of red, green, and

Tutorial on Ruby on Rails Framework Program connecting to MongoDB, railsmongodb We will introduce mongodb installation and setup of the ror project in the front. Now we will integrate it. 1. Create a project Rails active_record support is no longer

Example parsing for Hook methods in Ruby and ruby hook instance Parsing By using the Hook method, we can intervene in the life cycle of Ruby classes or modules, greatly improving programming flexibility.The following hook methods related to