Ruby

The current Ruby language is hot among programmers, and the open source community is constantly having new ruby apps. Thin and Sinatra are the best of the Times.But new things always have a maturity, just as any upgrades have a price. Sinatra and

Proc is a process object which is obtained after the object processing of block and its context (local variable scope and stack frame). You can use proc like a nameless function, but it does not import the scope of local variables (you can use

RVM is a command-line tool that provides the management and switching of a convenient, multiple-version Ruby environment. https://rvm.io/ If you are going to learn ruby/rails, RVM is one of the essential tools. All commands here are operated

Inheritance allows you to create a class that is refined (refinement) and special (specialization) for another class. For example, in our jukebox system, the concept of "song" is encapsulated in the song class, and then, as the market grows, we need

Ruby provides two access-level network services. At a lower level, you can access the underlying operating system, which enables both client and server-oriented connections and connectionless protocols to support basic sockets. Ruby also has a

The PROFILE.RB is a profiler for Ruby programs that can count and output the elapsed time of each method in order to find performance bottlenecks in program execution. This time use it to dissect the running time of the script. Using the method is

Let's briefly describe a unique feature of Ruby. block, a piece of code that can be associated with a method call, almost as if it were a parameter. This is an incredibly powerful feature. You can use the block implementation callback (but it is

Skynet is a very loud name because it is the super computer network that dominates humanity in the classic series "Terminator" starring Arnold Schwarzenegger has. But this article's Skynet is not so scary, it is a ruby version of the Google

Linux operating system: CentOS6.3 64bitruby:ruby-2.0.0-p247 I. Installing the development pack (using the default CentOS update source) Copy Code code as follows: # yum Install openssl* openssl-devel zlib-devel gcc gcc-c++ make

Environment configuration Before using Ruby to encode or decode JSON data, we need to install the Ruby JSON module first. Before installing the module you need to install Ruby Gem, and we use Ruby Gem to install the JSON module. However, if you are

People with Logstash know to debug Grok regular expressions above http://grokdebug.herokuapp.com. Now the question is: which is the strong wall technology? The page uses the JS file from Google domain name, so the visit frequently fails. So, on the

Some databases support a Boolean type, while others do not, making it difficult for an active record to abstract a Boolean type. For example, if the database does not support Boolean types, some developers use char (1) Instead, and the content uses "

In the last content, we demonstrated how to build a simple shopping cart, this time the content is very simple, to add error handling to the shopping cart. Concurrent processing is an unavoidable problem for web systems, and we mimic a scenario of

Configure the Ruby environment before installing cocoapods, this article summarizes how to install the ruby environment. Installing the ruby environment requires first installing Xcode and then installing homebrew, and then installing RVM to install

0. System Environment Uname-a Linux moyo-desktop3.19.0-21-generic#21-Ubuntu1418:31:112015 x86_64 x86_64 x86_64 GNU/Linux1. Install Curl sudo apt-get Install Curl 2. Install RVM Curl-l Get.rvm.io | Bash-s Stable

Switching from Java to Ruby is a significant change for programmers. Rava makes this migration process a bit more comfortable.QuotesI can write Java in any language.--AnonInstallationTo install using gem:sudo gem install Jimmeirich-ravaUsageRequire '

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

Author: Egg Email: xtfggef@gmail.com Weibo: http://weibo.com/xtfggef Blog: http://blog.csdn.net/zhangerqing (reprinted please explain the source) We often work in Linux, so we must learn to install these commonly used runtimes. These jobs are all

ActiveResource in Ruby on Rails When an HTTP response is in a different format (XML and JSON) than an existing one, you need to parse some additional formats to create a common format and use it in the category. The following methods should be

Details about the association between models in ruby on rails: rubyrails Preface:Before learning model Association, remember the following points:1. Link. Both ends must be written. Otherwise, errors that beginners cannot understand may occur. It is