Ruby01

1. 20分钟入门：https://www.ruby-lang.org/zh_cn/documentation/quickstart/4/
2. 编辑器选择：https://ruby-china.org/wiki/tools
3. 选择编辑器并下载安装：https://macromates.com/download
4. demo

点击查看代码

#!usr/bin/env ruby

class 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 "..."
		elsif @names.respond_to?("each")#是否响应迭代函数
			@names.each do |name| #each循环
				puts "A:Hello #{name}!"
			end
		else
			puts "B:Hello #{@names}!"
		end
    end
    
	def say_bye
		if @names.nil?
			puts "..."
		elsif @names.respond_to?("join")
			puts "A:Goodbyte #{@names.join(", ")}. Come back soon}"
		else
			puts "B:Goodbye #{@names}. Come back soon."
		end
	end
end

if __FILE__ == $0

    mg = MegaGreeter.new
    mg.say_hi
    mg.say_bye

    mg.names = "Zeke"
    mg.say_hi
    mg.say_bye

    mg.names = ["LV","dsa","dsa","dasdas","HH"]
    mg.say_hi
    mg.say_bye

    mg.names = nil
    mg.say_hi
    mg.say_bye
end