Ruby

When you are sharing objects in multi-threaded processing, multiple threads can modify the same object at the same time, possibly in an inconsistent state, and be aware of it when used. Example: Test.rb x = 010.times.map do |i| Thread.new do

I've seen the Ruby design pattern before, but I've forgotten all about it. Now buy a big talk design mode, it does not seem so boring, by the way the code with Ruby implementation.#-*-encoding:utf-8-*-#Operation classclassOperation

Explanatory language, top-down execution, pure object-oriented, cross-platform, dynamic binding, no multiple inheritance.NetBeans Sun's developmentIRB instructions for fast real-time input and return results quit or exitRDoc hello.rb Generating HTML

First, environmental installationCentOS Operating System1, installation RVMCurl-ssl Https://get.rvm.io | Bash-s StableRvm-v to see if the installation was successful2. Install RubyRVM Install 1.9.3Ruby-v viewing the ruby version numberRVM command

First, Methods,private_methods is an instance method of the object class; Instance_methods is an instance method of the module class.Let's start by looking at the reasons for this arrangement:We know that the method that a Ruby object can invoke is

Just contact Ruby, found that Ruby really strong, after so long Java, has been Java's tedious grammar of the entire language, especially Java exception, design out is a failure! Ruby is now up to 2.x, the community is active, and development

# Loads mkmf which is used to make makefiles for Ruby extensions require 'mkmf '# Give it a name extension_name = 'fsnet' dirs = ["/usr/local/lib"] $ libs + = "-Levent" $ libs + = "-levent_extra" $ libs + = "-levent_pthreads" $ libs + = "-ljemalloc"

1 # global variable 2 $ global_variable = 103 class class14 def print_global () 5 puts "global variable in class1 is # {$ global_variable}" 6 end7 end8 class1obj = class1.new9 class1obj. print_global () 1 # instance variable 2 Class Customer 3 def

  # Create a project directory/Opt/logs/TV-cibn-CMS# Install rbenv and Ruby 1.9.3 IN RUBY# Install and compile related packagesYum install-y GCC OpenSSL-devel libyaml-devel Readline-devel zlib-develSu-Ruby #/home/Ruby# Install rbenvGit clone https://

  Define simple method The keyword def is used for method definition, followed by a list of method names and optional parameter names. The list of parameter names is enclosed by a pair of parentheses. The code that constitutes the method subject is

1. preface whether using Ruby for system management or using rails for web development, periodic tasks may be encountered. They are subject to a certain period of time (1 hour, 2 days ......) continuously triggered. In Ruby, I think it is very

I, Definition: HSH = hash. New HSH = hash [1 => "A", 2 => "B"] HSH = {"1" => "A", 2 => "B "} Any object is supported as the key, and you are used to using symbol.   Ii. Common Methods #!/usr/bin/ruby def printResult(args) print args

Deploy Ruby servers# Create a project directory/Opt/logs/TV-cibn-cms# Install rbenv and ruby 1.9.3 IN ruby# Install and compile related packagesYum install-y gcc openssl-devel libyaml-devel readline-devel zlib-develSu-ruby #/home/ruby# Install

Ruby implements a powerful batch file deletion script sharing and ruby deletes file scripts. Recently, the number of apk packages on the server has increased, making manual rm operations too troublesome, it took several minutes to write a script to

Ruby concise learning notes (1): strings, numbers, classes and objects, ruby learning notes To prove that Ruby is really easy to use, hello world can also be written so concisely:Copy codeThe Code is as follows:Puts 'Hello world' 1. Input/OutputCopy

Jquery displays selected users, while jquery implements users Selecting a user is a common function. It mainly includes two Function Points (save selected options and display selected users) Functional requirements: 1. Select the user interface and

1. Get Data Obtain the first and last recordsCopy codeThe Code is as follows:Model. firstModel. first (options)Model. find (: first, options)Model. lastModel. last (options)Model. find (: last, options) Retrieve records by id Copy codeThe Code is as

The Ruby thread implements classic producer and consumer issues, and uses the Queue class in ruby to implement thread synchronization issues. Copy codeThe Code is as follows:Require "thread"Puts "ProAndCon"Queue = Queue. new # Use the Queue queue

There are many Ruby-based development frameworks. Next we will introduce the Ruby Rmagick installation skills in detail, and hope to help you. Ruby naming rules Basic Syntax of common Ruby Libraries Using pp () to output two-dimensional arrays

Recently, I was reading a Rails project and gradually came into contact with the Ruby language. Some of these concepts were confusing and ambiguous. I believe some people are just like me. They were not very clear about these concepts when they