Ruby

By using the Hook method, you can allow us to intervene in the lifecycle of a Ruby class or module, which can greatly improve the flexibility of programming.The hook methods associated with the lifecycle are as follows: Class is associated with a

With RBENV to manage multiple versions of the Ruby environment, we also need a tool to manage multiple versions of gems (such as rails), which is bundler, the project background is not in detail, need to understand directly to the official website

I do not know if you have to transfer data to the migration file experience, I believe that both the veteran and novice have done it. In fact, doing this is not going to work, but this practice will slowly introduce you to some unnecessary problems.

Learn a little bit about the class-related variables encountered by the syntax associated with ruby classes.Ruby is very flexible, the syntax seems very casual, such as looking at the following code Class FooAttr_accessor:name DEF initialize@name =

Cookies in Ruby, like other programming languages, have expires,domain,path,secure,name these references, so let's look at a simple cookie instance. Cookies and sessions are stored as strings, and other types of data types are coerced into strings,

JRuby 1.7.26 was released.Home: http://www.jruby.org/: Http://www.jruby.org/downloadJRuby 1.7.26 is the 30th updated version since JRuby 1.7.0. The main release target for version 1.7 is to fix any missing compatibility issues using

Problem:Recently, I encountered a problem when I was doing an application. The client needs to invoke the script information returned from the server side and execute. Where the script type includes Ruby. The code in Java that calls Ruby is roughly

Chapter4:starfish (starfish?) This example has the time to change the Linux environment to try it STARFISH1 bills itself as "a utility to make distributed programming ridiculously easy." I think that's a bit of a overstatement, but the

# Coding:utf-8Require ' OpenSSL 'Require ' base64 '#des加密并且base64编码def Des_encrypt Des_key, Des_text Des =openssl::cipher::cipher.new ("DES-ECB") Des.encrypt Des.key=des_key des_text= "#{des_text}" result = Des.update (Des_text) Result

Today is my first time to contact the Ruby language, according to the tutorial written a very simple Ruby program, the file named Hello.rb, the content is as follows:Puts "hello,ruby!";But the execution is error:After Baidu's solution is as follows:

Essential Tools Irb Check Ancestors 1.9.3-p545:023 > String.ancestors = = [String, comparable, Object, Kernel, Basicobject] String There are four superiors in front of the Filtration Method

#DefineFrench_string ="il \xc3\xa9tait une fois"long_string= Eofhere isa long stringwith many paragraphseofputs long_string.empty?puts long_string.include?"many"puts French_string+long_string#concatenatehash = {Key1:"Val1", Key2:"Val2"}string=""str2=

/home/zhenzhen/.rvm/rubies/ruby-1.8.7-p374/lib/ruby/site_ruby/1.8/rubygems/core_ext/kernel_require.rb:135:in ' Gem_original_require ':/home/zhenzhen/.rvm/gems/ruby-1.8.7-p374/gems/pry-0.10.3/lib/pry.rb:39:syntax error, Unexpected ': ', expecting ') '

Special case "1"The inner class does not automatically refer to its external class's parent class# info = "Top-level Info" class father info = "parent class Info" # puts Info end class son father # Info = " Subclass Info " # puts Info

Problem Description:Sass file compile time using the ruby environment, there is no problem in the XP environment, but in the windows7 environment, whether it is the interface Koala tool or command-line mode, the following error will occur:Syntax

Gsub ()The first parameter is Reg, and the second parameter is the character that is replaced.Returns the changed string with no side effects on the original string.No match will return the original string.irb(main):001:0"regWord"=>"regWord"irb(main)

Tutorial on task build tool rake in Ruby, rubyrake Rake Introduction Rake indicates Ruby Make, a code building tool developed by ruby. But why does Ruby need Rake? It is reasonable to say that Ruby Code does not need to be compiled and Rake is not

Detailed description of the Application of Singleton mode in Ruby Design Mode Programming, and ruby Design Mode IntroductionSingleton mode is one of the simplest forms of design patterns. This mode aims to make an object of A Class A unique instance

Evaluate the value of inverse polish expression for Stack applications, polish expression 1 # include 2 # include 3 # include 4 5 # define OK 1 6 # define ERROR 0 7 # define STACK_INIT_SIZE 20 8 # define STACK_INCREMENT 10 9 # define DIGITBUFFER 1

The observer pattern in the Design Pattern uses the example parsing in Ruby programming, and the observer ruby The observer mode (sometimes referred to as the publish/subscribe mode) is a software design mode.In this mode, a target object manages