Ruby

Go directlyCode: # Encoding: utf-8class dungeon # create Get Set Method # Save the player and room list attr_accessor: Player def initialize (player_name) @ player = player. new (player_name) @ room = [] end # sets the player location attribute

Arr = [1, 2, 3] 1) arr2 = arr. each {| element = element * 2} # Both arr and arr2 are still equal to [1, 2, 3] each. The changes to elements in the original array traversal are not saved.2) arr2 = arr. map {| element = element * 2} # arr is equal

How to use Ruby for Windows shell programming. For example, create an Internet Explorer instance.   Require " Win32ole "   # Include library IE = Win32ole. New ( ' Internetexplorer. Application ' )Ie. Visible =

Ruby Deployment Tool Overview: vglad 1.3 release and Capistrano handover and Maintenance The recent message about jamis Buck's stopping Capistrano development has caused many people to worry about the future of the Deployment Tool. Fortunately, the

We know what the self of the top-level domain is? Puts self # mainputs self. class # object We know that when a method is called, if no object is accepted, the default value is self, for example: Def tell_me_who puts selfendtell_me_who #

I. Judgment Structure   If ExpressionElsif expression  Else End IfExpression then end#Use then when writing a line  IfExpression#When the expression returns true, run the preceding code. ... Unless expression#When the expression is

Class array def iterate! (& Code) # note that the & Symbol self is used here. each_with_index do | N, I | self [I] = code. call (n) end endendarr = [1, 2, 4] arr. iterate! Do | n ** 2end # [1, 4, 9, 16] 　　 When I read the code today, it was masked

Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->1 #! /Usr/bin/ENV Ruby 2 3 class megagreeter 4 attr_accessor: names // sets attributes. Two methods (name, name =) are automatically generated to

1 Check whether the entered content is empty. In Models Validates_presence_of: title,: Description,: image_url 2 Verify that the entered content is Numeric

Http://developer.51cto.com/art/200703/41243.htm Introduction This is a short Ruby entry, and it takes only 20 minutes to complete. Here we assume that you have installed Ruby. If you have not installed Ruby, visit the official Ruby website to

1. Constants Although Ruby only requires uppercase letters of a constant, we recommend that you use uppercase letters of a constant name for better readability. Class personsFinger = 10; # define ConstantsPuts "Everyone has" + finger. to_s + "root

Some time ago, I was working on an ERP project, and the performance of my notebook was poor (MB memory), so I could not do any development. In my spare time, I think of Ruby, a scripting language of interest. I had long wanted to explore Ruby, but

No function, with a half-day time to get the environment, with a half-day time familiar syntax, the function can be self-checked manual function query page in the http://www.rubycentral.com/ref/index.html function library official station in

Ruby on Rails win Installation I found the new technology Ruby on Rails. I will not talk about it any more. Let's talk about my installation process today! First, download Http://rubyforge.org/projects/rubyinstaller/ I got the latest! Then install

Transferred from: http://blog.sina.com.cn/s/blog_4901d7bd0100b6lf.htmlrubyoperator reload   Reprinted tokenRuby's Operator Overloading is very interesting. Ruby allows "+" and other operators to be used as function names. Therefore, it is similar to

Input and Output: Standard input: A = gets, gets is to get a row of data from the standard input, lines = readlines get multiple lines of content at a time until EOF (CTRL + D) Puts a, puts is printed to the standard output   File input and

Module: The module definition is similar to the class, and the module keyword is used. However, a module cannot be instantiated or quilt-type. modules are independent and a module is an instance of a module class. The two most common functions of a

1. Win32ole   2. Rails plug-in Collection   3. How to Write a simple Rails Plugin   4. Create your own error message in Rails   5. Enhance the Automatic completion function of irb (words completion) Irb-r irb/completion   6. Document

Today, the following Program has made me struggle for a long time. The concept of private in Ruby is really strange... Class Test private def test_print puts 'test' endendclass Test2 you cannot call endendTest2.new by adding self here. private

Each The simplest iterator is to access all elements collected continuously. [1,3,5,7,9].each { |i| puts i }   Output result: 1 3 5 7 9 The unique function is to implement the for loop of the Ruby language. Because the built-in loop