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Annotations, variable declarations, Array Operations, and Ruby variables in the ruby tutorial I read an article "PHP basic tutorial" on "blog Park" two days ago and introduced PHP. D guago also wrote a "Ruby getting started tutorial" when learning Ruby ". It should be noted that this article is suitable for beginners w

To install Ruby, go to the ruby official website to download the Windows Installation Package of ruby1.56. After installing Ruby, open the DOS window and enter ruby-V to display it. Ruby 1.8.6 (patchlevel 0) [i386-mswin32] indicates that

entities are destroyed Delete_all: All associated entities are deleted directly from the database, unrecoverable nullify: foreign keys are Set to NULL, unrecoverable restrict_with_exception: Throw exception hint Restrict_with_error: Throw error prompt 5, Foreign_key: Define column name for foreign Key 6, inverse_of : Indicates the inverse associated entity 7, Primary_key: Indicates the associated item ID 8, through: Indicates that a many-to-many relationship uses a third-party entity 9, validat

Tutorial on processing file input and output in Ruby, and tutorial on ruby processing output Ruby provides a complete set of I/O-related methods, which are implemented in the Kernel module. All I/O methods are derived from IO classes. Class IO provides all basic methods, such as read, write, gets, puts, readline, getc, and printf. This section describes all the b

Concurrent concurrency and global lock details in ruby, and ruby parallel global explanation Preface This article mainly introduces you to ruby concurrency and global locks. We will share the content for your reference and learning. I will not talk much about it below. Let's take a look at the details. Concurrency and Parallelism During development, we often come

Ruby Learning tips for building a ruby environment under Linux1. Preface2.Linux Installing the ruby EnvironmentFirst, prefaceThis blog post records the construction of the Ruby programming environment under Linux.This article is based on the following articles:Http://www.cnblogs.com/xfiver/archive/2012/03/08/2385833.ht

The founder of Ruby talked about the ruby blocks and closure structure at on. I want to repost on Qiu Haifeng's translation network (0) font size: T | T This conversation is translated from the third part of the interview with Matz on the artima.com website to help you understand the blocks and closure structures in ruby. AD: This interview is an interview with

Project Address: Ruby-prof In the previous Profiling tool in Ruby, we listed several of the most commonly used profilers, but just a brief introduction, this time detailing how ruby-prof is used. Ruby-prof is a powerful, support CPU, memory use, object allocation and so on performance analysis, and provides a lot of fr

Ruby is a powerful object-oriented scripting language that allows you to quickly and easily object-oriented programming. Sometimes it's a little "fuss" to develop small projects using formal object-oriented languages such as Smalltalk, Eiffel, or C + +. And Ruby just meets the needs of these object-oriented programming. Of course, you can also use Ruby for genera

Introduction to file operations in Ruby and file operations in ruby Ruby provides a complete set of I/O-related kernel modules. All I/O methods come from IO classes. Class IO provides all the basic methods, such as read, write, gets, puts, readline, getc, and printf. This chapter covers all basic I/O functions available in Ru