Using number as index JSON

Question

Recently started digging in to JSON  and I m currently trying to use a number as  identifier   which doesn t work out too well  foo  bar  works fine  while 0  bar  doesn t    var Game         status                                          0  val                       1  val                       2  val                                                           0  val                       1  val                       2  val                                    alert Game status 0  0     Is there any way to do it the following way  Something like Game status 0  0 Would make my life way easier  Of course there s other ways around it  but this way is preferred

User · Accepted Answer

JSON only allows key names to be strings. Those strings can consist of numerical values.

You aren't using JSON though. You have a JavaScript object literal. You can use identifiers for keys, but an identifier can't start with a number. You can still use strings though.

var Game={
    "status": [
        {
            "0": "val",
            "1": "val",
            "2": "val"
        },
        {
            "0": "val",
            "1": "val",
            "2": "val"
        }
    ]
}

If you access the properties with dot-notation, then you have to use identifiers. Use square bracket notation instead: Game.status[0][0].

But given that data, an array would seem to make more sense.

var Game={
    "status": [
        [
            "val",
            "val",
            "val"
        ],
        [
            "val",
            "val",
            "val"
        ]
    ]
}

User · Answer

First off  it s not JSON  JSON mandates that all keys must be strings  Secondly  regular arrays do what you want  var Game       status                 quot val quot          quot val quot          quot val quot                      quot val quot          quot val quot          quot val quot             will work  if you use Game status 0  0   You cannot use numbers with the dot notation   0   Alternatively  you can quote the numbers  i e     quot 0 quot    quot val quot         you will have plain objects instead of Arrays  but the same syntax will work

User · Answer

When a Javascript object property s name doesn t begin with either an underscore or a letter  you cant use the dot notation  like Game status 0  0   and you must use the alternative notation  which is Game status 0  0     One different note  do you really need it to be an object inside the status array  If you re using the object like an array  why not use a real array instead

User · Answer

JSON is  JavaScript Object Notation   JavaScript specifies its keys must be strings or symbols    The following quotation from MDN Docs uses the terms  key property  to refer to what I more often hear termed as  key value     https   developer mozilla org en-US docs Web JavaScript Data structures Objects     In JavaScript  objects can be seen as a collection of properties  With the object literal syntax  a limited set of properties are initialized  then properties can be added and removed  Property values can be values of any type  including other objects  which enables building complex data structures  Properties are identified using key values  A key value is either a String or a Symbol value

User · Answer

What about   Game status 0  0  or Game status 0   0       Does one of these work   PS  What you have in your question is a Javascript Object  not JSON  JSON is the  string  version of a Javascript Object

User · Answer

Probably you need an array   var Game          status              val    val   val              val    val    val            alert Game status 0  0

User · Answer

JSON regulates key type to be string  The purpose is to support the dot notation to access the members of the object    For example  person     height  170   weight  60   age  32   You can access members by person height  person weight  etc  If JSON supports value keys  then it would look like person 0  person 1  person 2

[javascript] Using number as "index" (JSON)

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