Ruby

Class Mysqltest #Code here require "MySQL" Def testmysql dbc=mysql.real_connect (' localhost ', ' root ', ' 123 ', ' Ivic_porta L ') res=dbc.query (' select * from Virtual_machines ') puts "Test Mysql ...." While Row=res.fetch_row do puts "# {row[0]}

I've seen the Ruby design pattern before, but I've forgotten all about it. Now buy a big talk design mode, it does not seem so boring, by the way the code with Ruby implementation.#-*-encoding:utf-8-*-#Operation classclassOperation

#Ruby Built-in basic data type Nilclass,tureclass,falseclass,time,date,string,range,struct,array,hash#Numerice 1. Divided into Interger integer class. Interger is divided into Fixnum and bignum. #2. #Float浮点数#3.Complex plural. #dynamic

Explanatory language, top-down execution, pure object-oriented, cross-platform, dynamic binding, no multiple inheritance.NetBeans Sun's developmentIRB instructions for fast real-time input and return results quit or exitRDoc hello.rb Generating HTML

Just contact Ruby, found that Ruby really strong, after so long Java, has been Java's tedious grammar of the entire language, especially Java exception, design out is a failure! Ruby is now up to 2.x, the community is active, and development

  Require, load, and autoload are the methods defined in the kernel module. because both the class and the object class are mixed into the kernel module, you can call these methods whether self is an object or a class. These three methods are used

# Loads mkmf which is used to make makefiles for Ruby extensions require 'mkmf '# Give it a name extension_name = 'fsnet' dirs = ["/usr/local/lib"] $ libs + = "-Levent" $ libs + = "-levent_extra" $ libs + = "-levent_pthreads" $ libs + = "-ljemalloc"

We can think that module is a toolbox dedicated to storing a series of methods and constants. The module and class are very similar, but the module cannot create an instance or have sub-classes. They can only store things. For example: module Circle

The ruby regular expression is a Regexp class object.Main metacharacters Sn Meaning Example Xiaoming ^ Header /^ ABC/ ABC begin $ End of line /ABC $/ ABC too many rows

Encoding: undefinedconversionerror in productscontroller # create "\ xFF" from ASCII-8BIT to UTF-8 When uploading a photo using ruby1.9.3, this error is reported. File. Open ("# {rails. Root}/APP/assets/images/" + new_name, "W") {| file | File.

Install software 1. Very simple. If Apache, MySQL, and nginx are not installed. # Apt-Get installapache2 nginx 2. Enable Apache rewrite. # A2enmod rewrite # Apt-Get install mysql-Server 3. the ruby, Apache Ruby module, MySQL Ruby support,

  # Create a project directory/Opt/logs/TV-cibn-CMS# Install rbenv and Ruby 1.9.3 IN RUBY# Install and compile related packagesYum install-y GCC OpenSSL-devel libyaml-devel Readline-devel zlib-develSu-Ruby #/home/Ruby# Install rbenvGit clone https://

  Define simple method The keyword def is used for method definition, followed by a list of method names and optional parameter names. The list of parameter names is enclosed by a pair of parentheses. The code that constitutes the method subject is

Deploy Ruby servers# Create a project directory/Opt/logs/TV-cibn-cms# Install rbenv and ruby 1.9.3 IN ruby# Install and compile related packagesYum install-y gcc openssl-devel libyaml-devel readline-devel zlib-develSu-ruby #/home/ruby# Install

Ruby concise learning notes (1): strings, numbers, classes and objects, ruby learning notes To prove that Ruby is really easy to use, hello world can also be written so concisely:Copy codeThe Code is as follows:Puts 'Hello world' 1. Input/OutputCopy

Iiscnfg. vbs IIS configuration script, iiscnfg. vbsiis Import and Export All or selected elements of the local or remote computer Internet Information Service (IIS) configuration database, or configure the entire IIS (configure the database and

The Ruby thread implements classic producer and consumer issues, and uses the Queue class in ruby to implement thread synchronization issues. Copy codeThe Code is as follows:Require "thread"Puts "ProAndCon"Queue = Queue. new # Use the Queue queue

Ruby has powerful functions. The Ruby module Win32API we will introduce here is an additional library in the Ruby language. It can help us call Win32API directly. Example of Ruby code for getting the current class name Ruby module OpenURI to get

Ruby is a fully object-oriented interpreted scripting language. For such a new programming language, its features are very attractive to programmers. Let's take a look at the concepts related to Ruby threads. How to call win32ole IN Ruby Ruby

Recently, I was reading a Rails project and gradually came into contact with the Ruby language. Some of these concepts were confusing and ambiguous. I believe some people are just like me. They were not very clear about these concepts when they