ruby singleton

The code for Singleton (Singleton mode) in php design mode is as follows: /** * Singleton mode * * Ensure that a class has only one instance and provides a global access point to it. * */ Class Singleton { Static private $ _ instance = null; Private function _ construct () { } Static public function

PackageCom.easygo.singleton;/*** Java Singleton There are two ways, a hungry man and lazy, a hungry man is loaded before the object is created, take precedence over the object, and the lazy is to call the object after the object creation method to create the object *, understand the JVM loading principle is clear, the true meaning of the singleton is a hungry man, before the object is created. * @authorLX *

While designing a singleton mode, it is easy to design a class type that conforms to the principle of the singleton pattern, but considering the garbage collection mechanism and thread safety, we need to think more. Some designs can barely meet the project requirements, but when it comes to multithreaded design. Regardless of thread safety, it will inevitably bring hidden trouble to our programming. Here, w

Copy codeThe Code is as follows:/*** Singleton Mode** Ensure that a class has only one instance and provides a global access point to it.**/Class Singleton{Static private $ _ instance = null;Private function _ construct (){}Static public function getInstance (){If (is_null (self ::$ _ instance )){Self: $ _ instance = new Singleton ();}Return self: $ _ instance;}P

I've been working on Ruby for a while and have recently had some leisure events, learning about Ruby and preparing for future Ruby on Rails development.Ruby was founded in 1993 by as of Japan (まつもとゆきひろ/yukihiro Matsumoto). In contrast to chatty's development language such as Java, Ruby can be said to be small and beaut

[Ruby on Rails Learning 1] ubuntu14.04 configure rvm and ruby, ubuntu14.04rvm To install ruby, you must first install rvm. Rvm is Ruby Version Manager, a command line tool developed by Wayne E. Seguin. Rvm allows you to easily install and manage ruby productivity environmen

It's pretty rare I recommend new blogs to follow on Ruby inside. Not because I don't like them-I link to their posts all the time!-But because it's hard to tell if a new blog is going to keep going and be worth your while. Well, the Ruby community has a new blog in its midst that's proving to be a must-read-Ruby Best Practices.It's a must-subscribe (RSS feed) fo

What is Ruby FPDF? Ruby FPDF is a Ruby portOlivier Plathey's excellent PDF generator,FPDF.FPDF is written in PHP, and as such can only be used from PHP scripts.Ruby FPDF, as the name suggests, is written in Ruby and can be usedFrom Ruby scripts.