Ruby

A script that scans all URLs in the current page, written in Ruby, is a good example of learning Ruby's friends. #scanweb.rb #用法ruby scanweb.rb www.jb51.net　将当前结果保存在c:\1.txt require 'net/http' filename= File.new('c:\1.txt',"w+") if $*[0]==nil puts "

This article mainly introduces Ruby to realize producer and consumer code sharing, this article directly gives the implementation code, the need for friends can refer to the following ? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

Ruby,nokogori, crawl through the latest 10 pages plus picture ratio and save it both in text and database Copy Code code as follows: #encoding: Utf-8 Require "Open-uri" Require "Nokogiri" Require "MySQL" @dbh =mysql.real_connect

Demo Code: [Code] #!/usr/bin/env Ruby COUNT = 10 Require ' benchmark ' $account _chars = (' A ' ... ') Z '). to_a.delete_if {|c| c =~/[aeiouy]/} # $password _chars = (' 0 '. 9 '). to_a $password _chars = array.new $password _chars[0..9] = (' 0 ' ...

What is an accessor?We've discussed the real variables before, but not too much discussion. The real variable of an object belongs to its property and is a general difference from other objects from the same class. It is important to read and write

N+1 problem The n+1 problem is one of the most common performance issues in database access, and first describes what a n+1 problem is: For example, we have two tables in our database, one is customers, and the other is orders. The orders contains

Conditional judgments are present in the programming language, and the conditional judgments in Ruby are similar to those in Java, but there is a slight difference Conditions in ruby conditional judgment: 1 can use comparison operations such as ==,

I wrote a Ruby plug-in with C + + swig in my early years, but in practice I wrote Ruby extensions in native C + + because it was fairly simple. But long useless or will forget, had to turn over the old code memories, write this blog, if the next

When we are writing a module, it is more or less necessary to run the file directly or execute some methods, but this is not good for when the module is require or include, in Ruby, is there any distinction between running from the current file or

Recently participated in the seven-cow demo contest, decided to use Ruby development. So I ran into some questions and then solved them, and here's a record. In Ruby, Gem is a very common thing, it is the equivalent of Plug-ins, Ruby has a lot of

Writing a database management system with Ruby on Rails is very fast. Ruby on Rails has such a high productivity, not only is Ruby's syntax flexible, but it's all a big program thanks to activity records (active record). So what is an activity

A one-to-one association, or, more correctly, a pair of 0 or one-to-one associations, is implemented by a foreign key reference to at most one record in another table, and the following figure describes the relationship between the Orders table and

This note is used to help understand the "The ruby language allows us to define classes based on an object so that we can expand the behavior of an object separately. The example is as follows:Test = "hello" # normal string Normal = A. DUP # normal

Bruce Tate's beyond JavaArgue that JavaAs the preferred language for enterprise development, the rule will eventually end, and enterprise innovation also takes place in Java for the first time in ten years.Out of the domain. In that book, he

1. Send email via SMTP Every week, Holden Glova, Pat eyler, and Phil Thomson submit a ruby Weekly News (RWN) article to the ruby garden website (http://www.rubygarden.org. A ruby script receives this article via email, converts it from the original

Phprpc + Ruby + Arduino = led turn-on (?) Well, I know this is a very boring sample. For phprpc and Arduino, Google Before reading this demo, please install the SerialPort mentioned in another article. With another gem KIT: phprpc In this example,

1. Install the compiling environment gcc Install GCC online using Yum install 2. Install the ruby Development EnvironmentFirst download Linux Installation File: ruby-1.8.6-p111.tar.gzRun Tar-zxvf ruby-1.8.6-p111.tar.gz CD ruby-1.8.6-p111

As a good programmer, you should be clear about the benefits of the Ruby on Rails development framework. Here we will introduce some tips for installing Ruby on Rails locally. Many documents describe how to use the gem (one-click Ruby installer is

Translator's preface This blog is actually a series of replies from Uncle Bob to xreborner (in the previous blog, xreborner proposed a series of sharp ideas for Uncle Bob to protect C ++ rights ). Body I compared the time consumption of C ++, Java,

Test cases are similar to the Menu above, a total of 9 First look at the Element Definition (yaml ): # Channel switching-channel_0_link: div (: class, 'navmenubg '). li (: id, 'num _ 2 '). link (: href, 'HTTP: // beijing.xxxx.com/xxxshi')