javascript jquery中的toString方法？或类似的东西
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/5037369/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
toString method in jquery? or something similar
提问by Phil
ANSWER FOUND!
找到答案！
I'm reading an xml document and I am sending this to a function
我正在阅读一个 xml 文档，并将其发送给一个函数
$(data).find('colleges').attr('next')
that returns disciplineand javascript is thinking it's a variable, can I some how get the attribute in the tag and have it return as a string like 'discipline'
返回discipline并且javascript认为它是一个变量，我可以知道如何获取标签中的属性并将其作为字符串返回'discipline'
Is there a toString()-type method that I could add onto the selection?
是否有可以添加到选择中的 toString() 类型的方法？
$(data).find('colleges').attr('next').toString()
The issue I am having is that I am sending that to a function
我遇到的问题是我将它发送到一个函数
createSelect( $(data).find('colleges').attr('next') )
but firebug is giving me an error saying that the value, discipline, is undefined? Why is javascript reading discipline as a var and not a string?
但是萤火虫给了我一个错误，说价值，纪律，是未定义的？为什么 javascript 阅读规则是一个 var 而不是一个字符串？
回答by SLaks
The attrfunction returns a string, which you can put into a variable.
该attr函数返回一个字符串，您可以将其放入一个变量中。
回答by user113716
If this...
如果这...
$(data).find('colleges')
...doesn't find any matches ( <colleges>...</colleges>), then this...
...没有找到任何匹配项 ( <colleges>...</colleges>)，那么这个...
.attr('next')
...will return undefined.
……会回来的undefined。
The first thing you should do is test to see if the .find()found anything.
您应该做的第一件事是测试是否.find()找到了任何东西。
alert( $(data).find('colleges').length );
If the alertgives you 0, then there were no matches, and you'll have to inspect your datato see if it contains what you expect.
如果alert给你0，那么就没有匹配项，你必须检查你的data，看看它是否包含你所期望的。
