# !/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.


phone = "138-3453-1111 #这是一个电话号码"
 
# 删除 Ruby 的注释
phone = phone.sub!(/#.*$/, "")   
puts "电话号码 : #{phone}"
 
# 移除数字以外的其他字符
phone = phone.gsub!(/\D/, "")    
puts "电话号码 : #{phone}"