Ruby

Class coloredrectangle Def initialize (R, G, B, S1, S2)@ R, @ g, @ B, @ S1, @ S2 = R, G, B, S1, S2End Def coloredrectangle. white_rect (S1, S2)New (0xff, 0xff, 0xff, S1, S2)End Def coloredrectangle. gray_rect (S1, S2)New (0x88, 0x88, 0x88, S1,

Recently, rake was used for database migration. Ruby's activerecord only supports single-primary-key tables, which is very troublesome for the migration of compound-key tables.Assume that table A1 has a Sid primary key, and its storage is as follows:

Metaprogramming is a ruby feature that can dynamically modify the language structure, such as the class structure, module structure, and instance variable information. You can evenProgramAdd and run the newCodeYou do not need to restart your

Ruby 192 + watir 3.0.0 Today, I encountered a strange problem: Use watir: IE. attach in the script to locate a new ie window, and always report an error. error message: Watir-classic-3.0.0/lib/watir-classic/ie-class.rb: 760: In 'rescue in

Http://tryruby.hobix.com/provides a command line that, in addition to the built-in Ruby method, provides the following interesting and useful five commands: The help wizard takes about 15 minutes to help you learn the most basic things of Ruby.

System Environment: Windows 7 SP1 Ruby version: 1.9.2-P0 Devkit version: 4.5?   When you install eventmachine in this environment, errors are always reported.   Building native extensions. This cocould take a while...Error: Error installing

When I selected a language in the project in the early stage, I hesitated for a long time in ror and Django, and finally saw an evaluation.ArticleI also mentioned that Django is twice as efficient as Ror, so I chose Django. After a period of

Document directory About Style About Dynamics Structure Others Usage /*************************************** * Call by name Everything is an object and never closes Hook everywhere Yield/block/proc/Lambda, first-class citizen Symbol and

I just learned Ruby. It happened that the algorithm teacher encouraged me to write algorithms in unfamiliar languages. I will use ruby ~~ Ruby is really amazing, and many intuitive methods can be used ..... Infinite worship .... While I encountered

After studying flex for a while, we found that actionscript3 is as dynamic as Ruby and can build very powerful clients. However, for some text-based systems, it is a bit cool-killing, however, in the future, the client is moving towards multi-media,

Development Environment: OS: Windows XP RUBY: ruby1.9.1 Rails: rails2.3.5 Will_paginate: will_paginate2.3.11 (Run the gem install mislav-will_paginate -- source http://gems.github.com in the command line) IDE: rubymine2.0.1 DB: mysql5.0.9   This

Ruport Official Website: http://www.rubyreports.org/ This example introduces the simple development of Ruby reports.   Development Environment OS: Windows XP RUBY: ruby1.8.7 Rails: rails2.3.5 MySQL: mysql5.0.9 IDE: rubymine2.0.1   1. Install

This example is based on the ruby ruport practice-Report parameter implementation to implement addition, deletion, and modification of table parameters when the report is executed and defined. 1. Modify views/report_executions/edit.html.

Abstract: programming requires more knowledge, experience, judgment, and so on, which will not degrade due to age growth. In other words, programming can be done for a lifetime. This is slightly different from those of professional sports players. 　　

Ruby is an open-source and is freely available on the web, but it is subject to a license .. (Open Source protocol ...) Ruby is a general-purpose, interpreted programming language. (multi-purpose, interpreted) Ruby is a true object-oriented

Finally, I started to translate some Japanese sentences that I could not understand. I would like to ask the Japanese mm next to me. MM read it for the first time, did not understand it, and did not understand it for the second time. Japanese ....

Ruby Syntax: 1: Variable2: Comment3: embedded document4: Reserved Words Ruby currently uses the ASCII character set. It can recognize uppercase and lowercase letters. In addition to the variable and part of the direct amount, you canAdd spaces and

Require 'net/SMTP' Require 'ftool' Require 'getoptlong' $ Tomail = "" $ Subject = "" $ Content = "" $ Filename = "" $ I = 0 Def help () Puts "Usage:/nsendemail [Option]" Puts "/t -- to-T destination email" Puts "/t -- Subject-s Email Subject" Puts "/

Because I am used to Java, the general syntax will be compared with Java Variable name: must be a single entity (do not contain spaces), must begin with a letter and underline, case sensitive. Not much different from Java Numbers and expressions

Attr_reader: abc You can use Instance name. abc obtains the value of this variable, but cannot be modified. It is equivalent Def abcReturn @ abcEnd By the way, attr_writer and attr_accessor,Attr_writer: abc, which is equivalent Def abc = (abc)@