JavaScript dictionary data length

Question

{
    "F1.1": {
        "add": [
            {
                "id": 169138,
                "name": "volkswagen"
            },
            {
                "id": 173212,
                "name": "skoda"
            }
        ],
        "delete": [
            {
                "id": 175555,
                "name": "mercedes"
            }
        ]
    }
}

I'm not been able to get length of add and delete array F1.1 is dynamic value, hence we cannot rely on it. How can we get the array lengths?

Answer 1

const data = {
    "F1.1": {
        "add": [
            {
                "id": 169138,
                "name": "volkswagen"
            },
            {
                "id": 173212,
                "name": "skoda"
            }
        ],
        "delete": [
            {
                "id": 175555,
                "name": "mercedes"
            }
        ]
    }
};

// Get the dynamic property names
const dynamicProperties = Object.keys(data["F1.1"]);

// Iterate through the dynamic properties and get the lengths
dynamicProperties.forEach(property => {
    const arrayLength = data["F1.1"][property].length;
    console.log(`Length of ${property} array: ${arrayLength}`);
});