Adding to an existing JSON “Key” with values

Question

So to explain this, I am creating a JSON object and with this object, I would like to be able to modify it like a PHP array. Meaning I can add more values into the array at any given time to a key.

For instance, PHP would be like this:

$array = array();
$array['car'][] = 'blue';
$array['car'][] = 'green';
$array['car'][] = 'purple';

You can see that PHP can add more data into the array object with the key of 'car'. I'm wanting to do that same thing for a JSON object except it may not always be as a string for the key.

function count(JSONObject) {
    return JSONObject.length;
}

test = {};
test[100] = {
  charge: "O",
  mannum: "5",
  canUse: "Y"
};

I know you can create new objects like this, but this is not what I'm wanting to do.

test[101] = {
  charge: "O",
  mannum: "5",
  canUse: "Y"
};

This is what I can think of but I know it doesn't work:

test[100][count(test[100])] { // Just a process to explain what my brain was thinking.
  charge: "N",
  mannum: "7",
  canUse: "N"
}

I'm expecting the results to be somewhat like this (It also doesn't have to look exactly like this):

test[100][0] = {
  charge: "O",
  mannum: "5",
  canUse: "Y"
};
test[100][1] { 
  charge: "N",
  mannum: "7",
  canUse: "N"
}

How can I go about this so I can add more data into the object? I appreciate everyone's input for helping me find a resolution or even some knowledge.

Answer 1

It seems like this is what you want:

test = {};
test[100] = [{ // test[100] is an array with a single element (an object)
  charge: "O",
  mannum: "5",
  canUse: "Y"
}];

// add another object
test[100].push({
  charge: "N",
  mannum: "7",
  canUse: "N"
});

Learn more about arrays .

Answer 2

If I understand well, you're trying to convert this into javascript:

PHP

$array = array();
$array['car'][] = 'blue';
$array['car'][] = 'green';
$array['car'][] = 'purple';

JAVASCRIPT

var array = {};
array['car'] = ['blue', 'green', 'purple'];

EXPLANATION

PHP associative arrays -> {} in JSON

PHP indexed arrays -> [] in JSON

UPDATE1

I'm expecting the results to be somewhat like this (It also doesn't have to look exactly like this):

test[100][0] = {
  charge: "O",
  mannum: "5",
  canUse: "Y"
};
test[100][1] { 
  charge: "N",
  mannum: "7",
  canUse: "N"
}

Try this:

var test = {};
test[100] = [{"charge": "O", "mannum": "5", "canUse": "Y"}, {"charge": "N", "mannum": "7", "canUse": "N"}];