Ruby

Learn Ruby Reference tutorial: http://www.w3cschool.cc/ruby/ruby-installation-windows.htmlRuby Learning under the WINDOWXOne. Install ruby, download the latest window stable Ruby, this is 1.9.3 versionClick Next installation until completed, for

error:in ' require ': Cannot load such file--sqlite3/sqlite3_native (Loaderror)Remove the D:\Ruby22-x64\lib\ruby\gems\2.2under Ruby first. 0 \cache Directory, then enter in cmd: Gem install Sqlite3, and finally into D:\Ruby22-x64\lib\ruby\gems\2.2. 0

How to install ruby in OS XPackage downloadLink: Http://pan.baidu.com/s/1mgMil5I Password: TIQGInstallationhttp://brew.sh/1. Install Brew First (command line execution)ruby -e "$(curl -fsSL

The difference between recursion and iteration Recursion: 1) recursion is the invocation of itself within a procedure or function; 2) When using recursion, there must be a definite recursive end condition called a recursive exit. Iteration: Use the

May be the cause of the national firewall package, the installation of Railsinstaller after the execution always error, Bundle InstallDL is deprecated, fiddleFetching gem metadata from https://rubygems.org/.....Resolving dependencies ...

String is the most commonly used class in almost all object-oriented programming languages, and is no exception in Ruby, which is documented in several common methods of string in Ruby.Concat: Connect 2 strings, sample:puts "Hello". Concat ("world!")

Variable In the ruby world, there are five types of variables: global variables, local variables, instance variables, constant variables, and pseudo variables. Common: Global: For global use, start with $. Because it is global, the value can be

In the previous article, we talked about callable objects proc and Lambda in Ruby. They are all block-converted objects. There are methods for calling objects in ruby. You can obtain a method object by using the method and using the method name as

To install Ruby on Rails, first install Ruby, then install devkit, and then install rails; But when I installed Ruby, I directly installed rails, So I reported an error. I recorded the entire process in the order of my error routes so that people

Write a simple example 1. Create the following folder Note: The lib directory must have a Rb file with the same name as your gem. [Ruby]View plaincopy $ CD Hola $ Tree . ├ ── Hola. gemspec ── Lib └ ── Hola. Rb 2. write code . Hola.

Previously we tested model and controller and learned some common test methods. Now we will go deep into several test topics. The first is to use a Mock object. In many cases, our programs are dependent on the actual environment, such as the

Notes for Ruby on Rails migration: rubyonrails migration Save schema. rb under version control.Use rake db: scheme: load to replace rake db: migrate to initialize an empty database.Use rake db: test: prepare to update the schema of the test database.

The use of Block and iterator in Ruby is explained by rubyblock. Let's briefly describe a unique feature of Ruby. Block, a code Block that can be associated with a method call, almost like a parameter. This is an incredible feature. You can use

Ruby-based optimal binary search tree algorithm and ruby-based optimal binary search algorithm The pseudo code in the introduction to algorithms is rewritten, plus the constructor for the solution of the first question in the Introduction Class

A solution for modifying operation conflicts in Rails applications at the same time. A rails Solution Operating conflicts in Rails Applications are a common problem. Rails provides a simple and effective solution. For example, there is a shop module

Ruby-based watir-webdriver Automated Testing Solution and implementation (5), watirwebdriverThen the Ruby-based watir-webdriver Automated Testing Solution and Implementation (4)Http://www.cnblogs.com/javame/p/4164570.htmlcontinue ...... for special

Ruby iterative map concise writing implementation principle analysis, rubymap writing principle Simple Method usage If you have a string list, you need to convert each string in uppercase. You can use a simple method to complete the conversion.Copy

1. ruby Installation Here, we will install ruby under win, which corresponds to the number of operating system digits on our computer. For example, if my computer is 64-bit, we will download Ruby 2.0.0-p353 (x64. Then the installation process is

Ruby on Rails is famous for its elegant MVC Architecture, which is so attractive and beautiful, while CakePHP is one of the common frameworks in PHP development. If you don't want to be bound to the traditional PHP brick-and-mortar development, you

Ruby on Rails internationalization, rubyrails Language-related settings and strings should not be used in views, models, and controllers. The text should be moved to the language file under config/locales. When the tags of the ActiveRecord model