Ruby

http://guides.rubyonrails.org/Take a closer look at the relevant parts of the cache in the manual, and note the following sentence:This flag was normally set in the corresponding config/environments/*.rb and caching is disabled by the default for

Ubuntu upgrade Ruby to 2.1 1. Pre-installation update:sudo apt-get -y updatesudo apt-get install cmakesudo apt-get install -y build-essential zlib1g-dev libyaml-dev libssl-dev libgdbm-dev libreadline-dev libncurses5-dev libffi-dev curl git-core

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}

#Thread #1 is running Herethread. New { #Thread #This code} #Thread # This codeThread.new is synonymous with Thread.Start and thread.for.The value of the last expression in the code block is the value of the thread, which can be obtained by

Windows Ruby Installation Stepspreparatory work: 1.http://rubyinstaller.org/downloads/Download select Ruby 1.9.32.http : //rubyinstaller.org/downloads/Download Development KIT Note version and 1

1. Create a projectRails New Blog2. View the file structure belowTreeThe output is as follows, please pay attention to the part of the red circle.Gemfile, a gems for managing applications, a bit like Python's package, has a dedicated website to find

As a dynamic language, the method in the object does not need to be verified as a static language, and the object of the dynamic language keeps talking, and if you call a method that has not been defined, the program does not immediately error and

Class LanguageDef initialize (name, creator)@name = Name@creator = CreatorEnddef descriptionPuts "I ' M #{@name} and I were created by #{@creator}!"EndEndRuby = Language.new ("Ruby", "Yukihiro Matsumoto")Python = language.new ("Python", "Guido van

The development and version iterations of Rails are faster, and it's hard to keep track of the pace of the book. But no matter how fast Rails develops, its core framework and basic functionality have not changed much. "Web Development Agile Road" as

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

Demand:To achieve a resume class, you must have a name, you can set the gender and age, you can set up work experience. Three resumes needed in the endInitial implementation:#-*-encoding:utf-8-*-#Resume ClassclassResume attr_accessor:name,: Sex,:

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

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

How to check whether the Gem is installed in Ruby. I recently participated in the 7won demo competition and decided to use ruby for development. So I encountered some questions and solved them. Record them here. In Ruby, Gem is a very common thing.

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

Tips for creating strings IN Ruby: ruby Summary % {String} is used to create a String enclosed by double quotation marks.% Q {String} is used to create a String enclosed by double quotation marks. Copy codeThe Code is as follows:Str = A stringEND_OF_

Code for implementing the observer mode in ruby, javascript, and php, and ruby observer When I was asked about the observer mode in js during the interview, I have long known about this. It can be said that it is a very useful design mode in Dynamic

Basic Ruby knowledge Create class: the class name is followed by the class name. The first letter of the class name must be capitalized. The new method is used for instantiation. The constructor in c # has the same name as the class. In ruby, the

Preliminary introduction to multithreading in Ruby programming and multithreading in ruby Programming Every program running on the system is a process. Each process contains one or more threads. A thread is a single sequential control process in a

Brief description of the iterator in Ruby and brief description of the Ruby Generator The iterator is a method supported by the set. Objects that store a group of data members are called collections. In Ruby, arrays and hashes can be called