How to count the number of lines of a string in javascript

Question

I want to count the number of lines in a string

i tried to use this stackoverflow answer :

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

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 

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

any idea how to make it work?

Answer 1

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

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

Alternately you can try split method as below.

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

working solution: http://jsfiddle.net/C8CaX/