Ruby

Arrays and Hash tables Ruby's arrays and hash tables are indexed collections. Both are saved objects collection and can be read by key. The key of the array is a number, but the hash table supports the object as a key. They all grow with the

This article mainly introduces the simple introduction of socket programming in Ruby, is the basic knowledge of Ruby network programming learning, need friends can refer to the Ruby provides two access-level network services. At a lower level, you

Summarize the class extensions that you encounter in your work: 1, class Inheritance: When more than one class is common to many methods, the common method part can be extracted, and the required class is related to inheritance. Example:

In the practice of agile development, the test drive is indispensable. This article looks at a test-driven development example in rails. Before we wrote and conducted some unit tests and functional tests, our customers suddenly asked to add a

The essay briefly understands the use of rails ' test and test data, and this time to see how to add a test to a model for deletion and modification. 1. Or using the last written products_test.rb, modify the Test_turth method by the name

Use Instantrails to quickly build ruby on rails development environment There's been a lot of interest in Ruby on Rails to see what's been praised by many people, but the development that has been done under Windows is a headache for Ruby on

Introduction to Ruby and Rails Ruby is an object-oriented, dynamic scripting language. Its syntax is flexible and provides a rich library of classes. Therefore, the efficiency of writing programs in Ruby is very high. Although Ruby was very early (

There are three ways the shell command obtains the process ID:1.Ps-a |grep cmdname| awk ' {print '} '2.Pidof cmdname3.Pgrep cmdnameHow do you do it in Ruby?There are three ways to execute shell commands in Ruby:%x: Executes the command and returns

From the officialThe policy pattern defines a series of algorithms, encapsulates each algorithm, and allows them to be replaced with each other. The policy pattern makes the algorithm independent of the customers who use it.Structure diagramSimple

The pros and cons of Python, Lua, and RubyPythonAdvantages of Python:1. Python has more extension modules than other languages.2. Many Python tutorials can be found on the web. Not only that, but also a large number of English books and materials.

Yield keyword I understand this, use it to occupy a position, first mark the next place in the future to write code, wait until the call, then write the specific code. A bit like a function pointer, or a delegate in C #, but it's not quite the

Ruby Environment Sass Compile Chinese syntax error:invalid GBK character Error resolution method,Sass file compile time using the ruby environment, whether it is the interface of the Koala tool or command-line mode can not pass, it is annoying.Easy

Here I will not describe the history of the Ruby language. If you're not familiar with Ruby, the official website www.ruby-lang.org is the best place to go. For those who already know Ruby, I am here to give my reasons for falling in love with this (

Document directory Add a MySQL database Add a java db (Derby) Database Download Ruby support If you have not installed the netbeans 6.0 IDE, open the netbeans ide 6.0 download page and download the IDE versions that contain Ruby support. If you

Tutorial on the basic usage of Regular Expressions in Ruby programs, ruby Regular Expressions Most of Ruby's built-in types are similar to other programming languages. Mainly include strings, integers, floats, and arrays. However, only script

Collections writing guide in Ruby and Ruby collections writing guide Preference array and the literal representation of Hash (unless you need to pass parameters to their constructor ). # bad arr = Array.new hash = Hash.new # good arr = []

A Brief Introduction to Ruby on Rails's support for PostgreSQL array types, railspostgresql I am very happy to announce that Rails 4.0 now supports PostgreSQL array types. you can easily create fields of the array type through: array => true in

Demonstrate Ruby's six characteristics that are easy to be misunderstood with actual code. The Code demonstrates ruby misunderstanding. Introduction: if you are a C ++ developer, you need to use Ruby to quickly execute some prototype designs. When

Example parsing: Use of Strategy Mode in Ruby Design Mode Programming, rubystrategy Today, your leader is eager to find you. I hope you can help him. He is in a hurry to go to the meeting. What can I do? You are curious.He told you that there is a

Application instance analysis of appearance mode in Ruby Design Mode Programming, and ruby Design Mode What is the appearance mode? The appearance mode provides unified interfaces for a group of different interfaces in the subsystem. The upper-layer