摘要：找：Ruby API文档:http://www.ruby-doc.org/core-2.0/Programming Ruby:http://www.ruby-doc.org/docs/ProgrammingRuby/替换字符串方法：1.单个替换"hello ruby".sub('ruby','rb')"hello ruby ruby".gsub('ruby','rb')Ruby正则表达式资料：http://ruby-doc.org/core-2.0/Regexp.htmlRuby区间(ran 阅读全文