截斷前行和cariage回報（\ R）或新行（\ n）的用省略號

Question

我有這個款之後（可能是我有一個以上的段落）

=> "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.} 

按回車（\ r）和新行（\ n）的，我只需要這些從上面的段落細節，任何想法我怎麼能這樣做？

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.... 

很簡單的辦法 - 讓我們說我有a\nabc\r\nd\r\nab\neba和搜索關鍵字爲b，我只需要abcabeba

Answer 1

我不知道該怎麼<em>\1</em>與此有關，但可能，你要想這， 我想。

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

請注意，正則表達式處於單行模式。

或者，如果你在Linux上做這個，仍然需要處理（不僅\n也）\r，那麼這可能是更安全：

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"