Javascript / jQuery Exec 结果为 Null

发布于 2024-09-03 07:38:13 字数 493 浏览 5 评论 0原文

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 = (/(.*?)/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);
    });
 });

原文

How do I skip over this next line if it turns out to be null? Currently, it (sometimes) "breaks" and prevents the script from continuing.

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);
    });
 });

分享到QQ

分享到微博

如果你对这篇内容有疑问，欢迎到本站社区发帖提问参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。

发布评论

需要登录才能够评论，你可以免费注册一个本站的账号。

黒涩兲箜 2024-09-10 07:38:13

$.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 null

$.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);
    });
 });

You must check that title is not null before you get the result at index 1

回复收藏 0 原文

~没有更多了~