Javascript子字符串未返回正确的字符串

Question

i was manipulating the text in this document http://www.dlib.org/dlib/november14/brook/11brook.html , while i noticed something strange. I was looking at the beginning of the article, in particular here:

Michelle Brook
The Content Mine
michelle@contentmine.org
...

(I am using jquery xpath)

var string=$("document").xpath("form[1]/table[3]/tr/td/table[5]/tr/td/table[1]/tr/td[2]/p[2]").html();
var new_string=string.substring(0,14);

I would expect that new_string was "Michelle Brook", but it was "Michelle Bro". Why that? Is there a particular char that makes string.substring() fail?

Answer 1

在尝试对字符串进行子字符串化之前，请使用以下内容从字符串中删除所有开头和结尾的空格：

var new_string=string.replace(/^\s*/, '').replace(/\s*$/, '').substring(0,14);