Javascript/jQuery Exec 结果为 Null

Question

如果下一行结果为空，我如何跳过它？目前，它(有时)会“中断”并阻止脚本继续运行。

var title = (/(.*?)</title>/m).exec(response)[1];

$.get(url, function(response){
    var title = (/<title>(.*?)<\/title>/m).exec(response)[1];
    if (title == null || title == undefined){
        return false;
    }
    var words = title.split(' ');
    $.each(words, function(index, value){
        $link.highlight(value + " ");
        $link.highlight(" " + value);
    });
 });        

Answer 1

$.get(url, function(response){
    var title = (/<title>(.*?)<\/title>/m).exec(response);
    if (!title || !title[1]){
        return false;
    }
    title=title[1];
    var words = title.split(' ');
    $.each(words, function(index, value){
        $link.highlight(value + " ");
        $link.highlight(" " + value);
    });
 });

在获得索引 1 处的结果之前，您必须检查 title 是否不为空