JavaScript内部对象键，带有空格的字符串。？(JavaScript inner object key with a string having space .? [duplicate])

 
 
 这个问题在这里已有答案： 
 
 
 
  
 如何访问包含特殊字符的对象属性？ 1个答案 
 
  
 访问/处理（嵌套）对象，数组或JSON 19答案 
 
 
 
 
 我有一个以下格式的json对象，我试图检索关键“ krishna kk ”的等级 ，这给了我一个Uncaught SyntaxError: Unexpected token [ error。 任何人都可以帮助理解如何获取键名在其中有空格的内部对象数据。 
 
[
    {"studentinfo": [
            {
               "rama nathan": {
                    "grade": "1",
                    "roleno": "9",
                    "score": 9
                }
            },
            {
                "krishna kk": {
                    "grade": "3",
                    "roleno": "9",
                    "score": 4
                }
            },
            {
                "john Doe": {
                   "grade": "2",
                    "roleno": "5",
                    "score": 7
                }
            }
        ],
    }
]
 
 我的代码如下： 
 
var stugrade = studentobject["0"].studentinfo["0"].[rama nathan].grade;

 
 
This question already has an answer here:
 
 
 
  
 How to access object properties containing special characters?  1 answer  
 
  
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I have a json object in the below format and am trying to retrive the grade for the key "krishna kk" which gives me an Uncaught SyntaxError: Unexpected token [ error. can any one help to understand how to get the inner object data where the key name has spaces in it.
 
[
    {"studentinfo": [
            {
               "rama nathan": {
                    "grade": "1",
                    "roleno": "9",
                    "score": 9
                }
            },
            {
                "krishna kk": {
                    "grade": "3",
                    "roleno": "9",
                    "score": 4
                }
            },
            {
                "john Doe": {
                   "grade": "2",
                    "roleno": "5",
                    "score": 7
                }
            }
        ],
    }
]
 
My code as below :
 
var stugrade = studentobject["0"].studentinfo["0"].[rama nathan].grade;

原文：https://stackoverflow.com/questions/45245593