在Javascript中拆分字符串

Question

I am trying to extract an article ID from the following href:

/MarketUpdate/Pricing/9352730

I just want to extract the ID at the end of the string and am using the following code:

    var $newsLink = $(this).attr('href');

    var $newsString = $newsLink.substr($newsLink.lastIndexOf('/'));

However this returns the final '/' which i do not want.

Answer 1

var $newsString = $newsLink.substr($newsLink.lastIndexOf('/')+1);

Note that your assumption here is that the '/' is present in the string and there's an ID after it. A safer way to do this check if there's a chance '/' might not be present or the ID is missing would be to check for it first using:

if ($newsLink.lastIndexOf('/') != -1 && $newsLink.lastIndexOf('/') + 1 < $newsLink.length) {
    var $newsString = $newsLink.substr($newsLink.lastIndexOf('/')+1);
}

Answer 2

您可以通过告诉substr调用在索引后面开始一个字符来跳过/字符，如下所示：

var $newsString = $newsLink.substr($newsLink.lastIndexOf('/') + 1);