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代码编辑器：
# !/usr/bin/ruby -w # -*- encoding:utf-8 -*- # filename: main.rb # author: 简单教程(www.twle.cn) # Copyright © 2015-2065 www.twle.cn. All rights reserved. $, = ", " months = Hash.new( "month" ) months = {"1" => "January", "2" => "February"} keys = months.keys puts "#{keys}"
运行结果：