eloquent ruby

This article mainly introduces CGI Programming in Ruby, including creating Form forms and other basic content. if you need it, you can refer to Ruby as a general language, it is not just a language used in WEB development, but Ruby is the most common in WEB application and WEB tool development. With Ruby, you can not

How to configure the Ruby development environment in CentOS 7, centosruby This article will share with you a tutorial on how to configure the Ruby development environment in CentOS 7 for your reference. Here is a detailed introduction: Install Ruby 2.2 The Ruby version in the CentOS7 repository is 2.0, but if necessary

send message to object display We can send a message directly to the object: Ruby Code Copy Code code as follows: Class HelloWorld def say (name) Print "Hello,", name End End HW = Helloworld.new Hw.send (: Say, "world") We usually use Hw.say ("World"), but send can work on private methods. Not only so send can make the program more dynamic, let's take a look at an example: We have defined a class person, and we want

A local variable starts with a lowercase letter or an underscore (_). Local variables do not contain nil values like global and real variables before initialization. Ruby> $foo Nil Ruby> @foo Nil ruby> Foo ERR: (eval): 1:undefined local variable or method ' Foo ' for Main (Object) The first assignment of a local variable is done much like a declaration. If you

Many times we will find that the real production environment is not a lot of external network, only intranet environment, this time we need to install Ruby, we can not provide the Yum command to install online, this time we need to download the installation package for offline installation. This article is mainly about if you install ruby offlineBefore installing, let's briefly introduce Rubyfirst, Introduc

Ruby on Rails is a framework that makes it easy for you to develop, deploy, and maintain Web applications. October 2015 programming language leaderboard Ruby entered the top 10 of the Tiobe leaderboard, which shows how popular it is. This article will help you open the door to Ruby on Rails web development and help you get to the world of

Global variables start with $.ProgramBefore initialization, the global variable has a special value nil. Special variables starting with $ and with a single character are listed here. for example, $ contains the process ID of the Ruby interpreter, which is read-only. here are the main system variables and their meanings (details can be found in the ruby reference manual ): $! Last error message $ @ Er

Ruby is a scripting language for simple and fast object -Oriented programming (object-oriented programming). Simple Introduction Ruby is open source and available on the web for free, but requires a license . Ruby is a universal, interpreted programming language . Ruby is a

Some programming languages (such as C ++ and clos) provide multiple inheritance mechanisms: A class can inherit from multiple superclasses. For example, a house may inherit from a building class (together with the Office and hospital classes) and residence class (together with the apartment class ). Although multiple inheritance may become a powerful feature of a language, many object-oriented languages are not added to it because it increases the complexity and ambiguity of the language.

CentOS6.2 Install Rvm+ruby+rails (1) RVM The official website should be revised once,Using Java code Curl-l https://get.rvm.io | bash-s stable Download and install the RVM stable version. Not using Bash Soon after installing RVM, re-login to a new SSH, using RVM-V to check the version.(2) Install some libraries, compile and install other software or libraries will be used whenJava code Yum Install zlib zlib-devel sqlite-devel

http://www.aqee.net/why-every-programmer-should-learn-python-or-ruby/If you are a student, you should be c,c++ and Java. There will be some VB, or c#/.net. How much you may have developed some Web pages, you know some html,css and JavaScript knowledge. On the whole, it's hard to see how many students have the ability to master a language beyond the limits of these languages. That's a shame, because there are a number of programming languages that make

How to quickly and correctly install Ruby, Rails to run the environment For new entry-level developers, how to install Ruby, Ruby Gems and Rails running environments can be a problem, and this page focuses on how to quickly install a ruby development environment with a plausible path.The secondary installation method

Basic Learning Ruby--Basic Learning (i) Project folder description Ruby-Basic Learning (ii) foreign key configuration for cascading deletions Ruby-Basic Learning (c) Setting time in China timezone Ruby--Basic Learning (iv) Timedate processing Ruby-Ba

How to Improve Ruby On Rails Performance 1 Introduction to Introduction It is always said that Rails is so slow that it has become a common issue in the Ruby and Rails communities. However, this statement is not true. As long as you use Rails correctly, it is not difficult to increase the running speed of your application by 10 times. So how can we optimize your application? Let's take a look at the followi

Author: published by tianen Beijing Aerospace Publishing House. Ruby is a language with the word "Ruby ". Rails is a technical framework. Its word is "Rails ". The meaning of "Ruby on Rails" is that it is full of Ruby rails. Rails is a B/S structure programming framework based on the

Output to: http://robbin.javaeye.com/blog/57474 There is almost no controversy in the MACOs platform, and textmate is used by everyone. However, there are many ides available for selection and use on the Windows platform, but each has its own strengths and weaknesses. Based on all the ruby ide I have used. Ror ide on Windows platforms is mainly divided into two categories: one is a heavyweight full-featured IDE, such as Eclipse, netbeans, ide