Ruby

As a software engineering student, recently wanted to learn a scripting language, after some query, understand that Ruby and Python are pretty good choice, but may be more inclined to diversification and liberalisation, because python to achieve

My little brother was a beginner of Ruby, and I didn't use Linux.Search on the Internet a lot about the configuration of the development environment article, but always and actually a bit in and out, find n times the article, finally found the

The Enumberable enumerable module can be understood as an abstraction to traverse the search and compare sorted collections. This module provides two capabilities for classes through Mixin:1, you can traverse the search Enum.all? {|object| block}

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

#R Read,#W Write,#a Append,#r+ Read or write from the head position of the file.#w+ Read-write mode, if the file already exists to empty the file, does not exist to create a new file,#A + If the file exists on the last side attached, create a new

Programmers learn any new language and always start by writing a Hello World in a new language, and we are no exception to writing a minimalist Hello world with Ruby first.Say minimalism deserves to be deserved because there is only one line of code:

  Require, load, and autoload are the methods defined in the kernel module. because both the class and the object class are mixed into the kernel module, you can call these methods whether self is an object or a class. These three methods are used

# 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"

Singleton is one design pattern in the software engineering. Ruby has its own special feature to declare Singleton class. I will demonstrate two examples as below:Class logger def initialize @ log = file. open ("log.txt", "A") end @ instance =

  # 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://

I. How to define Association There are often associations between two models. To solve the complex operation problems caused by these associations, you can define their associations when defining a model. For example, the MERs and orders entities

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

Potential and Weakness Analysis of Ruby multithreading, and ruby Multithreading Most Web applications are IO-intensive. Using the Ruby multi-process + multi-thread model can greatly increase the system throughput. The reason is: when a Ruby thread

In Ruby, you can use the mechanism to batch download photos from the School Intranet, You have nothing to do with it. You have used "machize" to create a code that can download photos of on-campus albums. It's a little simple to write .... It mainly

In Ruby, multithreading Queue (Queue) is used to download blog articles and save them to a local file. rubyqueue Ruby: complete code for downloading blog articles locally using multiple threads Copy codeThe Code is as follows:# Encoding:

Delete merged git branch scripts in Ruby, rubygit It is much easier to use Git to manage code projects. However, after completing the feature branch or hotfix, you always forget to delete these useless branches one by one, repetitive manual work

7 tips for Ruby iterators and ruby7 skills Ruby absorbs the regular expressions of Perl and the readability of Python, so the counting value method is very user-friendly and flexible. Here we can illustrate it as an example:1. Print "hello, world" 7

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

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