Storing a Key Value Array into a compact JSON string

Question

I want to store an array of key value items, a common way to do this could be something like:

// the JSON data may store several data types, not just key value lists,
// but, must be able to identify some data as a key value list

// --> more "common" way to store a key value array
{
  [
    {"key": "slide0001.html", "value": "Looking Ahead"},
    {"key": "slide0008.html", "value": "Forecast"},
    {"key": "slide0021.html", "value": "Summary"},
    // another THOUSANDS KEY VALUE PAIRS
    // ...
  ],
  "otherdata" : { "one": "1", "two": "2", "three": "3" }
}

But, when there is many pairs / items, the string length becomes prohibited, and I want a compact way, this could be an example:

// --> (1) a "compact" way to store a key value array
{    
  [
      {"slide0001.html", "Looking Ahead"},
      {"slide0008.html", "Forecast"},
      {"slide0021.html", "Summary"},
      // another THOUSANDS KEY VALUE PAIRS
      // ...
  ],
  "otherdata" : { "one": "1", "two": "2", "three": "3" }
}

Additionally, I want a way to identify the data as a keyvalue array, because, I may want to store other data in the same JSON file. I have these examples:

// --> (2) a "compact" way to store a key value array    
{
    "keyvaluelist":
    [
      {"slide0001.html", "Looking Ahead"},
      {"slide0008.html", "Forecast"},
      {"slide0021.html", "Summary"},
      // another THOUSANDS KEY VALUE PAIRS
      // ...
    ],
    "otherdata" : { "one": "1", "two": "2", "three": "3" }
}

// --> (3) a "compact" way to store a key value array    
{
    "mylist":
    {
      "type": "keyvaluearray",
  "data":
    [
        {"slide0001.html", "Looking Ahead"},
        {"slide0008.html", "Forecast"},
        {"slide0021.html", "Summary"},
                    // another THOUSANDS KEY VALUE PAIRS
                    // ...
    ]
    },
    "otherdata" : { "one": "1", "two": "2", "three": "3" }
}

What do you thing, which one do you suggest, do you have another way ? Thanks.

UPDATE 1: Remove invalid code. Javascript => JSON

UPDATE 2: Add non key value data

UPDATE 3: Replace "[" and "]" for "{" and "}" in each key value pair

user_5765981 · Answer

For use key/value pair in json use an object and don't use array

Find name/value in array is hard but in object is easy

Ex:

var exObj = {
  "mainData": {
    "slide0001.html": "Looking Ahead",
    "slide0008.html": "Forecast",
    "slide0021.html": "Summary",
    // another THOUSANDS KEY VALUE PAIRS
    // ...
  },
  "otherdata" : { "one": "1", "two": "2", "three": "3" }
};
var mainData = exObj.mainData;
// for use:
Object.keys(mainData).forEach(function(n,i){
  var v = mainData[n];
  console.log('name' + i + ': ' + n + ', value' + i + ': ' + v);
});

// and string length is minimum
console.log(JSON.stringify(exObj));
console.log(JSON.stringify(exObj).length);

Storing a Key Value Array into a compact JSON string

4 Answers