Ruby

Public classInvertiblelist: list { Public NewT This[intIndex] { Get { if(Index >=0)return Base[index]; if(Count + Index 0) Throw NewIndexOutOfRangeException (); return This[Count

Recently doing a scan code login function, for this I also searched the internet about the implementation of the scan login. When this function was completed, I decided to organize the whole realization, so that I can see it later and also

#将ARGV [0] convert to regular expression typePattern= regexp.new (argv[0])#Devise Gem PackDevise is one of the most widely used authentication gem packages in Ruby. Devise provides us with complete features from registration to login, from forgotten

#!/usr/bin/ruby=beginThere are 5 types of variables supported by RubyGlobal variables: The value of the uninitialized global variable begins with $0 and generates a warning using the-w option the assignment of global variables changes global state

ref:https://www.ruby-lang.org/en/documentation/quickstart/#!/usr/bin/env rubyclass megagreeter Attr_accessor:names # Create The object def initialize (names = "World") @names = Names End # Say hi to everybody def say_hi if @names. Nil? Puts "...

when testing with Ruby, there are a lot of times when you need some sort of data initialization and a post-mortem restore of the data, and these methods are sorted out below.Require "Test/unit"class Testanion #用例执行前只执行一遍初始化数据def Self.startupanion= '

A brief introduction to Ruby Foundation 1. Ruby installation under Windows Platform (1): http://rubyinstaller.org/downloads/(2) installation process Here we choose the installation path to D:\Ruby. The following 3 options are: (1) Whether TCLTK

=begin       conditional judgment statements include if statements, unless statements, case statements,=end#if  statements =beginif  conditions   then   processing 1elsif  conditions 2 then   processing 2else   processing 3end=enda = 10b =  20if a > 

1. Relationship of classes and instancesUse "instance. Class" To see which class an object belongs toUse "instance. Instance_of (class name)" To determine whether the instance belongs to a classUse "instance. Instance_methods" To view all instance

1. Invocation of the methodObject. Method name (parameter 1, parameter 2, ...). ) can omit the parameter list ()Object. Method name (parameter 1, ...).            ) do | Variable 1, variable 2,...| You can omit the parameter ()Block contentEndObject.

OrderRecently tried a bit coffeescript, and sass, have to say that these two together is indeed a good choice, familiar with the development is relatively fast.Of course to develop this first need to build the environment, here will need to have

ObjectiveThe language is rarely heard, it may not be used to hear too much about Ruby, work requires the language, need to start learning the language from 0, slowly learning simply ... It's amazing ... forgive me for being shallow. Originally very

P and the puts is a Ruby The most commonly used methods, many children's shoes may think they are similar, the use of the time is not paid attention to, but carefully looked up, they are clearly different. Let me give you an example:class Foo　　def

puts"Hello World"puts("Ni hao Shijie")# The parentheses behind the method inRuby do not write, and the puts method acts like the printf method . a = " Hello " puts a B =3 C =2 puts b + c Puts a + b #行8: Numbers and

Ruby methodThe method name starts with a lowercase letter and is used as a constant if you start with a capital letter ( this is odd )Define a method with no parametersdef method_name Expr. EndDefine a method that has a parameterdef method_name

A deep understanding of the block Feature in Ruby, rubyblock What is a block? Block is not uncommon in Ruby. The official definition of block is "a piece of wrapped code ". Of course, I don't think this explanation will make you better understand. A

Ruby's XML format data parsing library Nokogiri advanced, rubynokogiri I. Basic syntax1. Get the nokogiri object as a string directly: html_doc = Nokogiri::HTML("Mr. Belvedere Fan Club")xml_doc = Nokogiri::XML("Alf") Html_doc and xml_doc here are

Ruby installation and running, Ruby installation and running Ruby Installation Notes OSX or linux is better Implementation of different versions: c ++, C, and java This C Ruby Installation Method Both linux and OSX are pre-installed.

How to Improve Ruby On Rails performance (1) 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

Resolve the application of proxy mode in Ruby design mode development, proxyruby Proxy ModeThe Proxy mode is a structural design mode. It mainly solves the problems caused by direct access to objects. For example, the objects to be accessed are on a