JSON to dictionary in JavaScript?

Question

In my JS code, I need to convert the JSON response from server to a dictionary so that I can access them by key names. Here is the situation:

Say, this is the JSON r

Answer 1

Something like this allows you to create a dictionary in one line, and specify the key and value used, or at least the key where the value becomes the entire object.

function toDictionary(items, key, value) {

    var dictionary = {};

    if (items) {
        for (var i = 0; i < items.length; i++) {
            var item = items[i];
            dictionary[key(item)] = value ? value(item) : item;
        }
    }

    return dictionary;
}

Example usage:

var dictionary = toDictionary(result.employees, function (record) { return record.id; });
var employee = dictionary[34];
if (employee) {
  // do something with employee object
}