Ruby

To use sass, you need to ruby2.0 the above versionUbuntu upgrade Ruby to 2.11. Pre-installation update: sudo apt-get-y updatesudo apt-get install Cmakesudo apt-get install-y build-essential Zlib1g-dev libyaml-dev libssl- dev libgdbm-dev libreadline-

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

Symbol: Denotes "First name", such as the name of the string, the name of the identifier.How to create a Symbol object: precede a name or string with a colon: Test: " Hello Ruby "In Ruby, each object has a unique object identifier (Identifier),

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= '

#!/usr/bin/rubyputs"Hello, Ruby, what is your name?"$name=stdin.getsputs"Hi, I am"+$namedefWelcome (Name,a = 9,b = 9,*c) puts"Hi #{name}"c.each{|x|Print "#{x}"}#print "a =" + $aA = 10; b = 11#print "Hi, B" + $bres = A *Bend#Welcome ("RUBY")Puts

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

1, strong type, that is, the type conversion is not automatic, and C + + is a weak type. # Rubyi = 1puts "Value is " + i# TypeError: can‘t convert Fixnum into String# from (irb):2:in `+‘# from (irb):2

#设置奖励信息 def set_award_info (task_params,award_params) if task_params[:goods_i D].to_i = = sequel::model::table # update Sys_task_award_account award_params[:account].split (/;/). |params| Task_award = {} task_award[:account_id] = nil

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.

1Require'Matrix'2 3 classMatrix4 defto_pretty_s5s =""6i =07 whileI self.column_size8s + ="\ n" ifI! =09j =0Ten whileJ self.row_size Ones + =' ' ifJ! =0 As + =Self.element (i, J). to_s -J + = 1 - End thei + = 1 - End - s -

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

Singleton is a design pattern in the software engineering. Ruby has it own special feature to declare Singleton class. I'll demonstrate II examples as below:Class Logger def initialize @log = File.Open ("Log.txt", "a") end @ @instance =

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

=begin         #字符串          #数字, Several classes of numbers:   fixnum: The largest integer value that the native machine byte can store, and  bignum: An integer value that exceeds the maximum integer value that can be stored by the native machine

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 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.

Monkey Patch Programming Method and Its Application in Ruby, patchruby What is Monkey Patch )? In dynamic languages, functions are appended and changed without modifying the source code. Objective of using Monkey patch:1. append Function2. Function

The template method in the design mode is used in the Ruby application instance, and the ruby application instance. Instance 1Today, you have started programming as usual.The project manager tells you that you want to add a new function on the

For suggestions on Ruby on Rails view writing, rubyrails Do not directly call the model layer from the view.Do not construct complex formats in the view and output them to a method or model of the view helper.Use the partial template and layout to