截断前行和cariage回报（\ R）或新行（\ n）的用省略号

Question

我有这个款之后（可能是我有一个以上的段落）

=> "On the server side,\n\nmy EJB3 application uses Spring for configuring all sorts of things. So,\n\nmy EJBs all look up various ApplicationContexts and use them as a sort of\r\nwell, I was going to say poor man's JNDI, but the reality is that JNDI in the J2EE environment is really a poor man's Spring. :-)\n\nOn the GUI side,\n\nI use it instead of resource injection to get access to my EJBs.\n\nThat lets me test the GUI component with simple pojos.\n\nHope that helps." 

上irb，我分配成x

x = %q{On the server side,\n\nmy EJB3 application uses Spring for configuring all sorts of things. So,\n\nmy EJBs all look up various ApplicationContexts and use them as a sort of\r\nwell, I was going to say poor man's JNDI, but the reality is that JNDI in the J2EE environment is really a poor man's Spring. :-)\n\nOn the GUI side,\n\nI use it instead of resource injection to get access to my EJBs. \n\nThat lets me test the GUI component with simple pojos.\n\nHope that helps.} 

按回车（\ r）和新行（\ n）的，我只需要这些从上面的段落细节，任何想法我怎么能这样做？

my EJB3 application uses Spring for configuring all sorts of things. So,...my EJBs all look up various ApplicationContexts and use them as a sort of...I use it instead of resource injection to get access to my EJBs.... 

很简单的办法 - 让我们说我有a\nabc\r\nd\r\nab\neba和搜索关键字为b，我只需要abcabeba

Answer 1

我不知道该怎么<em>\1</em>与此有关，但可能，你要想这， 我想。

x.scan(/.*ejb.*/i).join("...") 

请注意，正则表达式处于单行模式。

或者，如果你在Linux上做这个，仍然需要处理（不仅\n也）\r，那么这可能是更安全：

x.scan(/[^\n\r]*ejb[^\n\r]*/i).join("...") 

Answer 2

s = eval("%q{a\nabc\r\nd\r\nab\neba}") 
p s.split("\n").select{|x| x.include? 'b'}.join('') 
#=>"abcabeba"