javascript json 键作为数字
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json keys as numbers
提问by Jeffz
I have a JSON passed to script. I do not know JSON keys as they are dynamic.
我有一个 JSON 传递给脚本。我不知道 JSON 键，因为它们是动态的。
Actually, they are numbers. That's what I'm getting.
实际上，它们是数字。这就是我得到的。
var countries = {"223":"142,143","222":"23,26,25,24","170":"1,2"};
I tried to access data like this:
我试图访问这样的数据：
var objKey = 223; (var objKey = "223";) countries.objKey;
I tried changing JSON to
我尝试将 JSON 更改为
var countries = {"country223":"142,143","country222":"23,26,25,24","country170":"1,2"};
... and access it like this:
...并像这样访问它：
var objKey = "country"+223; (var objKey = "country"+"223";) countries.objKey;
... again nothing.
……又没什么。
Any advice would be greatly appreciated.
任何建议将不胜感激。
回答by user113716
Instead of this:
取而代之的是：
countries.objKey;
Do this:
做这个：
countries[objKey];
With square bracket notation, you can use the value referenced in a variable (or use a string or number) to reference the property name.
使用方括号表示法，您可以使用变量中引用的值（或使用字符串或数字）来引用属性名称。
