Ruby

GitHub in the user authentication process using a dual-key mechanism, in the two-key encryption mechanism, only legitimate users have private keys, as long as the GitHub when the request can be proved to submit the request of the client to have the

Use string interpolation instead of string concatenation. # bad email_with_name = user.name + ' ' # good email_with_name = ' #{user.name} " # good email_with_name = Format ('%s ', User.Name, User.email) Consider

Modules are methods, classes, and constants that are grouped together. Module two main benefits: The module provides a namespace and avoids name collisions. Module to implement a hybrid factory. The module defines a namespace in which

Can this code run? What the hell is this data? require ' Erb ' Data = DATA.Read Max = 15_000 title = "Hello world!" content = "Hello world!\ n" * Ten Max. Times{ ERB.New(Data). Result(binding) } __end__ This magical data

Go to Script/consle after upgrading Ruby and Rails: Copy Code code as follows: /usr/local/lib/ruby/1.8/irb/completion.rb:10:in ' require ': No such file to load-ReadLine (Loaderror) From/usr/local/lib/ruby/1.8/irb/completion.rb:10

I've been learning about rails, because learning Java is an introductory language. It's a bit of a bad fit. In particular, Ruby's hash. But it's just a matter of thinking it through. It's basically a key-value. There is no big problem with writing

Iterators are methods that are supported by collections. An object that stores a set of data members is called a collection. In Ruby, arrays and hashes can be called collections. The iterator returns all the elements of the collection, one after

The time class is used in Ruby to represent dates and times. It is based on the system date and time provided by the OS. The class may not represent a date before or after 1970 or 2038 years. This tutorial will familiarize you with all the

At last year's Yow Melbourne developer Conference, I attended some workshops. These workshops are the responsibility of the @coreyhaines and @rains, so TDD (test-driven development) is the main content of the discussion. It's usually not a problem,

Literal constructor for Ruby regular expression: //Try this: >>//.class=> RegexpPattern matching consists of two parts, a regular expression (regexp), and a string. A regular expression predicts a string that either satisfies the prediction or is

The main callable object in Ruby is the Proc object, the Lambdas, the method object. Proc is a separate sequence of code that you can create, store, and use as a parameter to the method, or you can execute it using the call method if you wish.

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

1. IntroductionRuby is a Japanese Yukihiro Matsumoto written, easy to learn object-oriented scripting language, like Perl, rich in word processing, system management and other rich features, but Ruby is simple, easy to understand and expand. Very

The following installation steps can be installed under/usr/local/rbenv, and all users can share rbenv. #rbenv安装 (/usr/local/rbenv) #安装依赖, the root user is required Yum install-y git Yum Install-y readline-devel Yum install-y openssl-devel

This article is original. Reprinted Please note: Author: Utensil Blog: http://blog.csdn.net/utensil/ Email: utensilcandel@gmail.com In the past two days, the previous blog website based on XML and PHP has been transplanted to MySQL and ror to

Ruby metaprogramming is worth noting. Avoid infinite loop metaprogramming. Do not confuse the core class (do not use monkey patch) when writing a function library ). It is best to use the code block form in the string interpolation form.When you use

Comparison of class variables and instance variables in Ruby, ruby class variable instances 1. The class variable name starts with @. A Class variable is shared by all instance objects of the class. The instance variable name starts with @, and each

Tutorial on creating and using hash in Ruby and ruby hash Hash is a set of key-value pairs similar to "employee" => "salary. Hash indexes are completed by any key of any object type, rather than an integer index. Others are similar to arrays. The

Differences between p and puts in Ruby: rubyputs P and puts are especially common methods in Ruby. Many children's shoes may think that they are similar and do not pay attention to them when using them. However, they are obviously different from

Ruby uses the Continuous Object Continuation implementation generator, rubycontinuation Ruby has many classic drive structures, such as enumerators and generators. this section briefly introduces the concept of generator. A generator generates an