课程
/前端开发
/JavaScript
/JavaScript深入浅出
再次访问a.length的时候为什么有值？不是已经销毁了吗？
2016-01-17
源自：JavaScript深入浅出 1-4
正在回答
说的极是?
http://www.yuli.gov.cn/QA/ShowQuestion.aspx?Id=20535http://www.yuli.gov.cn/QA/ShowQuestion.aspx?Id=20460http://www.yuli.gov.cn/QA/ShowQuestion.aspx?Id=20377http://www.yuli.gov.cn/QA/ShowQuestion.aspx?Id=21296http://www.yuli.gov.cn/QA/ShowQuestion.aspx?Id=20400http://www.yuli.gov.cn/QA/ShowQuestion.aspx?Id=21094http://www.yuli.gov.cn/QA/ShowQuestion.aspx?Id=20912http://www.yuli.gov.cn/QA/ShowQuestion.aspx?Id=20194http://www.yuli.gov.cn/QA/ShowQuestion.aspx?Id=21269http://www.yuli.gov.cn/QA/ShowQuestion.aspx?Id=20070http://www.yuli.gov.cn/QA/ShowQuestion.aspx?Id=20433http://www.yuli.gov.cn/QA/ShowQuestion.aspx?Id=20725http://www.yuli.gov.cn/QA/ShowQuestion.aspx?Id=20042http://www.yuli.gov.cn/QA/ShowQuestion.aspx?Id=20535http://www.yuli.gov.cn/QA/ShowQuestion.aspx?Id=21020http://www.yuli.gov.cn/QA/ShowQuestion.aspx?Id=21333http://www.yuli.gov.cn/QA/ShowQuestion.aspx?Id=20319http://www.yuli.gov.cn/QA/ShowQuestion.aspx?Id=20666http://www.yuli.gov.cn/QA/ShowQuestion.aspx?Id=21172http://www.yuli.gov.cn/QA/ShowQuestion.aspx?Id=21222http://www.yuli.gov.cn/QA/ShowQuestion.aspx?Id=21166http://www.yuli.gov.cn/QA/ShowQuestion.aspx?Id=20842http://www.yuli.gov.cn/QA/ShowQuestion.aspx?Id=20860http://www.yuli.gov.cn/QA/ShowQuestion.aspx?Id=20180http://www.yuli.gov.cn/QA/ShowQuestion.aspx?Id=20238http://www.yuli.gov.cn/QA/ShowQuestion.aspx?Id=20591http://www.yuli.gov.cn/QA/ShowQuestion.aspx?Id=21459http://www.yuli.gov.cn/QA/ShowQuestion.aspx?Id=20683http://www.yuli.gov.cn/QA/ShowQuestion.aspx?Id=20318https://www.oschina.net/search?scope=news&q=%E7%BC%85%E7%94%B8%E7%9A%87%E5%AE%B6%E5%9B%BD%E9%99%85%E5%9C%A8%E7%BA%BF%E5%A8%B1%E4%B9%90%E3%80%90B2024%C2%B7CN%E6%AC%A2%E8%BF%8E%E6%82%A8%E3%80%91%E5%BE%B7%E5%B7%9E%E9%98%B2%E7%96%AB%EF%BD%82https://minecraft.fandom.com/zh/wiki/UserProfile:%E6%9E%9C%E6%95%A2%E6%96%B0%E7%99%BE%E5%88%A9%E5%8D%9A%E5%BD%A9TL262%C2%B7C%EF%BC%AFM%E6%B2%B3%E6%B1%A0%E5%8D%AB%E8%AE%A1%E5%A7%94?variant=zh-hk&cb=&mobileaction=toggle_view_mobilehttps://mod.3dmgame.com/mods?mods_title=%E7%BC%85%E7%94%B8%E9%87%91%E9%BC%8E%E5%9B%BD%E9%99%85%E5%A4%A7%E9%85%92%E5%BA%97%E7%94%B5%E8%AF%9D%E7%BD%91%E5%9D%80B2024%C2%B7CN%E8%82%87%E5%BA%86%E4%BA%A4%E7%AE%A1%E5%B1%80%EF%BD%9B%EF%BD%82http://house.china.com.cn/sousou/%25101%253D%252C%2520%25BD%25F0%25D2%25F8%25B5%25BAapp%25CF%25C2%25D4%25D8%25BF%25AA%25BB%25A7%25CE%25A2%25D0%25C5%25BF%25AA%25BB%25A7%25B5%25E7%25BB%25B0%25D3%25CE%25CF%25B7%25CD%25F8%25D6%25B7B2024%25A1%25A4CN%252C%25BB%25B4%25B1%25B1%25B5%25E7%25CC%25A8%25A3%25DF%25A3%25B3%25A3%25AD_1s.htmhttp://www.minitu.cn/?s=%E7%BC%85%E7%94%B8%E5%B0%8F%E5%8B%90%E6%8B%89%E7%BB%B4%E5%8A%A0%E6%96%AF%E7%AE%80%E4%BB%8B%E6%8E%A8%E8%8D%90B2024%C2%B7CN%E5%95%86%E6%B4%9B%E7%BD%91%E7%BA%A2%EF%BC%A9https://wap.zol.com.cn/index.php?c=List_List&keyword=%E6%9E%9C%E5%8D%9A%E4%B8%9C%E6%96%B9%E9%BE%99%E8%99%8E%E6%B4%97%E5%90%97%E6%8E%A8%E8%8D%90TL262%C2%B7C%EF%BC%AFM%E9%82%A2%E5%8F%B0%E4%BA%BA%E6%89%8Dhttp://biz.finance.sina.com.cn/zjzt/more.php?lytype=ipoly_hyxdly&title=%C3%E5%B5%E9%CD%F2%B7%E1%B9%FA%BC%CA%BF%CD%B7%FE%D4%DA%CF%DF%B9%D9%CD%F8B2024.CN%D4%E6%D7%AF%B0%D9%D0%D5%CD%F8http://www.minitu.cn/?s=%E8%80%81%E8%A1%97%E6%9E%9C%E5%8D%9A%E4%B8%9C%E6%96%B9%E9%9B%86%E5%9B%A2%E5%AE%98%E7%BD%91%E7%BD%91%E5%9D%80%E5%AE%98%E7%BD%91TL262%EF%BC%8E%EF%BC%A3%EF%BC%AF%EF%BC%AD%E5%8D%97%E5%AE%81%E4%BC%81%E4%B8%9A%EF%BD%98%EF%BC%A3%EF%BC%95https://search.bilibili.com/all?keyword=%E9%91%AB%E7%99%BE%E5%88%A9%E5%85%AC%E5%8F%B8%E5%BE%AE%E4%BF%A1%E5%BC%80%E6%88%B7%E7%94%B5%E8%AF%9D%E5%BC%80%E6%88%B7%E6%8E%A8%E8%8D%90B2024%C2%B7CN%E5%9B%BA%E5%8E%9F%E7%94%9F%E6%B4%BB%EF%BC%A4https://www.fastsoso.cc/search?k=%E7%BC%85%E7%94%B8%E5%B0%8F%E5%8B%90%E6%8B%89%E6%B8%AF%E9%83%BD%E8%B4%B5%E5%AE%BE%E4%BC%9A%E5%BC%80%E6%88%B7%E5%AE%98%E7%BD%91TL262%C2%B7C%EF%BC%AFM%E6%B7%B1%E5%9C%B3%E6%8B%9B%E8%81%98%EF%BC%97%EF%BC%99http://biz.finance.sina.com.cn/zjzt/more.php?lytype=ipoly_hyxdly&title=%D0%C2%B0%D9%CA%A2%D3%E9%C0%D6%B6%C4%B3%C7%B9%D9%CD%F8B2024%A1%A4CN%E1%E9%D6%DD%C3%C0%CA%B3https://www.fastsoso.cc/search?k=%E6%96%B0%E9%94%A6%E6%B1%9F%E7%82%B9%E5%87%BB%E9%83%A8%E5%BC%80%E6%88%B7%E5%BE%AE%E4%BF%A1%E5%BC%80%E6%88%B7%E7%94%B5%E8%AF%9D%E3%80%90%E5%AE%98%E7%BD%91%E2%86%92B2024.CN%E3%80%91%E6%9B%B2%E9%9D%96%E6%AF%95%E4%B8%9A%E7%94%9Fhttp://www.vpansou.com/query?wd=%E8%B7%AF%E5%8D%95%E5%A8%B1%E4%B9%90%E7%BD%91%E5%BE%AE%E4%BF%A1%E5%BC%80%E6%88%B7%E7%94%B5%E8%AF%9D%E3%80%90B2024%C2%B7CN%E6%AC%A2%E8%BF%8E%E6%82%A8%E3%80%91%E6%B3%B8%E5%B7%9E%E5%B9%BF%E6%92%AD%EF%BD%82%EF%BC%AD%EF%BC%BFhttps://www.oschina.net/search?scope=all&q=%E7%BC%85%E7%94%B8%E6%96%B0%E7%99%BE%E5%88%A9%E6%8E%A8%E8%8D%90B2024%C2%B7CN%E6%B2%B3%E6%B1%A0%E5%8A%9E%E4%BA%8B%E5%A4%84http://www.vpansou.com/query?wd=%E6%B5%99%E6%B1%9F%E4%B8%9C%E9%98%B3%E7%9C%9F%E4%BA%BA%E9%BE%99%E8%99%8E%E3%80%90B2024%C2%B7CN%E6%AC%A2%E8%BF%8E%E6%82%A8%E3%80%91%E5%8D%97%E5%B9%B3%E7%BE%8E%E9%A3%9Fhttp://biz.finance.sina.com.cn/zjzt/more.php?lytype=ipoly_hyxdly&title=%C3%E5%B5%E9%D0%C2%BD%F5%BD%AD%D3%E9%C0%D6%20%D0%C2%BD%F5%BD%AD%D3%E9%C0%D6%CD%F8%D6%B7%B9%D9%CD%F8B2024%A1%A4CN%B8%B7%D0%C2%D2%C6%B6%AF%A3%AFhttp://www.minitu.cn/?s=%E6%B5%99%E6%B1%9F%E7%BB%8D%E5%85%B4%E6%89%8B%E6%9C%BA%E7%BD%91%E6%8A%95%E5%B9%B3%E5%8F%B0%E5%AE%98%E7%BD%91B2024%C2%B7CN%E4%B8%B9%E4%B8%9C%E5%8D%AB%E7%94%9F%E5%B1%80%EF%BC%B5%EF%BD%8E%EF%BC%96https://www.oschina.net/search?scope=all&q=%E7%8E%89%E5%92%8C%E5%9B%BD%E9%99%85%E5%A8%B1%E4%B9%90%E5%BE%AE%E4%BF%A1%E5%BC%80%E6%88%B7%E7%94%B5%E8%AF%9D%E5%AE%98%E6%96%B9%E7%BD%91%E5%9D%80B2024%C2%B7CN%E8%A1%A1%E9%98%B3%E5%8D%AB%E8%AE%A1%E5%A7%94%EF%BC%A6%EF%BD%93
length是固有属性。
回忆过去的小孩
因为。length不是自定义属性。
举报
由浅入深学习JS语言特性，且解析JS常见误区，从入门到掌握
4 回答configurable为false的时候就无法再变回true?
2 回答为啥new完之后,再去访问obj.y就是undefined呢？
3 回答对象属性值的访问
3 回答10:00的时候return中的{func:func,prop:prop}怎么理解？
2 回答创建student的时候为什么不用new Person()
