访问JSON对象时出现问题？

Question

Am facing issue in accessing the JSON object : JSON Object am receiving is :

{"71":"Heart XXX","76":"No Heart YYYY"}

I tried to get the value of 71 and 72 separately and use it ...

but am getting some compile time issue as : Syntax error on token ".71", delete this token

Code:

var map=$("#jsonText").val();
    alert(map);
    var  obj=jQuery.parseJSON(map);
    alert("JSON ::"+obj.71);

If am printing obj , am able to view [Object Object]

Can any one out there please help me to find the mistake i did ..I know the question above is asked in many threads in SO . Below are the few threads i found , but failed when i attempted to implement it ..

jquery json parsing

Also tried using the Jquery tutorial given in

Jquery JSON

Its working fine if the key is a String but getting the above error if its a number ...

Answer 1

Try this:

alert("JSON ::" + obj[71]);

"71" isn't a valid property identifier: an identifier should start with a letter, the underscore or the dollar sign. You can avoid this problem using square brackets instead.

Note : everything that's put between square brackets is converted into strings. Even functions, DOM elements or regular expressions: they're all converted with their toString methods, or their superclass' toString .

So 71 there is converted into "71" . If you want a little more performance you can directly use the latter. If you don't need it, you can cut some key presses with just 71 .

Answer 2

改用

alert("JSON ::"+obj["71"]);

Answer 3

according to the rules or javascript a identifier should not start by a number so if it starts by a number or for that matter contains spaces and other special charcters then you should access it by using the [] operator and not by . operator
so obj.71 is invalid but obj["71"] is

Answer 4

try using this site:

http://json.parser.online.fr/