Ruby

In this article, we will explore the problem of risk prediction in Java and Ruby language migrations. Generally speaking, "using Ruby with Risk" is a common view, for some reason. Because the use of new language is inherently risky. As Ruby on

We may need to clean up when a method is finished. Perhaps an open file needs to be closed, the buffer data should be emptied, and so on. If there is always a single exit point for each method, we can safely place our cleanup code in a location and

Install RVM and Ruby: Shell$ curl-l Https://get.rvm.io | Bash-s Stable--ruby1 $ curl-l Https://get.rvm.io | Bash-s Stable--rubyReference articles:http://blog.111cn.net/abbuggy/article/details/8170899http://www.ruby-lang.org/en/downloads/ Windows1.

In this chapter we will discuss more Ruby process control. Case We use case statements to test for ordered conditions. As we have seen, this is quite close to the switch of C,java, but more powerful. Ruby> i=8 ruby> case I | When 1, 2..5 | Print "

Ruby parsing JSONRuby Parsing JSON Example: JSON = ' ["A", "B", "C"] ' puts "Unsafe #{unsafe_json (JSON). Inspect}" #输出Unsafe ["A", "B", "C"] Ruby parses JSON to parse the above JSON string into array. Such a method is not safe, for

Name the mails the Somethingmailer. Without Mailer, it is not immediately apparent which is a Mailer, and which view is related to it.Provides HTML and plain text view templates. Enable mail failure to send error in your development environment.

Return,break,next the use of these keywords involves jumping out of scope, and their difference lies in the scope of the different keywords jumping out, because there are blocks of code that cause some places to pay extra attention.Return Common

Private Private functions can only be invoked in the context of this class and subclass, and can only be accessed by self. This means that the private function can only be accessed within this object. The access rights of an object instance

1. Japanese Turn UTF-8The difference between iconv.new (' cp932 ', ' utf-8 ') and iconv.new (' Shift_JIS ', ' utf-8 ') Iconv.new (' Shift_JIS ', ' utf-8 ') does not support the following format: Class №001-18 XXXXXXX and can only change the

Closures (Closure) are free code that is not bound to any object, and the code in the closure is independent of any objects and global variables, and is only relevant to the context in which the code is executed. Today we'll take a quick look at

Ruby gives us six ways to complete a task when we encounter the need to invoke the operating system shell command: 1.Exec Method: The Kernel#exec method replaces the current process example by invoking the specified command: Copy Code code

Divided into the following sections:• Basic implementation• Reference the original object in the iteration, or change the value of the array directly instead of returning a new array• Pass an infinite number of arguments to the iteration• Basic

Rails built log functionality, or more precisely, rails exposes the Logger object, which can be used in all rails programs. Logger is a simple log frame ported from Ruby (you can type RI logger to view the documentation of the standard library in

We've already completed a simple shopping cart, and from this start we'll see how to test in rails. When we created the shopping cart program in our depot directory, there is already a test directory, which is for us to test preparation. So far, we'

In the last section, we added error handling to the shopping cart, this time to format the empty cart and amount. To this moment we have not added any processing to the "Empty cart" link that displays the Shopping information list page. We first

Writing a database management system with Ruby on Rails is very fast. Ruby on Rails has such a high productivity, not only is Ruby's syntax flexible, but it's all a big program thanks to activity records (active record). So what is an activity

For several days, ROR environment finally set up, in order to prevent later forget, less detours, special records ============================================= installation process 1. Installation rubyinstaller-1.9.2 2, install the

1. Dependencies Required for installationsudo apt-get updatesudo apt-get install Git-core Curl Zlib1g-dev build--dev libreadline-dev Libyaml-dev libsqlite3-dev sqlite3 Libxml2-dev libxslt1-dev Libcurl4-openssl-dev python-software-properties libffi-

Install RubySince the ruby version of the APT Package Manager in Ubuntu is too old, consider compiling the installation from the source code. Here is an example of installing ruby2.3.0:sudo Install build-essential zlib1g-dev libssl-dev

On the IIS site, "Handler mappings" click "Add script Map ..."Request Path: *.RBExecutable file: C:\Ruby22\bin\ruby.exe%s%sName: RubyClick OK if you are prompted with an error at this time:If you add a script map handler mapping, the Isapimodule or