Revision history [back]

Null keys cannot be eliminated from an array of objects in JSON as null is a valid value and represents the absence of a value. However, if you want to remove the entire object which contains a null key, you can do the following:

1. Loop through each object in the array.
2. Check if the object contains a null key.
3. If it does, remove the object from the array.
4. Repeat the process until all null keys are removed.

Here is an example code snippet in JavaScript:

var array = [
    { "name": "John", "age": null },
    { "name": "Jane", "age": 25 },
    { "name": "Bob", "age": null }
];

for (var i = 0; i < array.length; i++) {
    if (array[i].age == null) {
        array.splice(i, 1);
        i--; // Since the array shifted down after removing an object
    }
}

console.log(array); // Output: [{"name": "Jane", "age": 25}]

In this example, the null keys with the "age" property are removed from the array of objects.