如何计算javascript中字符串的行数 [英] How to count the number of lines of a string in javascript

问题描述

我想计算一个字符串中的行数

I want to count the number of lines in a string

我试图使用这个stackoverflow答案：

i tried to use this stackoverflow answer :

lines = str.split("\r\n|\r|\n"); 
return  lines.length;

此字符串（最初是缓冲区）：

on this string(which was originally a buffer):

 GET / HTTP/1.1
 Host: localhost:8888
 Connection: keep-alive
 Cache-Control: max-age=0
 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_2) AppleWebKit/535.2 (KHTML,like Gecko) Chrome/15.0.874.121 Safari/535.2
 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
 Accept-Encoding: gzip,deflate,sdch
 Accept-Language: en-US,en;q=0.8
 Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.3

由于某种原因我得到了行='1'。

and for some reason i got lines='1'.

任何想法如何让它工作？

any idea how to make it work?

推荐答案

使用正则表达式，您可以将行数计算为

Using a regular expression you can count the number of lines as

 str.split(/\r\n|\r|\n/).length

或者你可以尝试如下分割方法。

Alternately you can try split method as below.

var lines = $("#ptest").val().split("\n");  
alert(lines.length);

工作解决方案： http://jsfiddle.net/C8CaX/

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