Javascript function to loop through flattened array and return whole object or value to specified key

gistfile1.js

/**
 * loop through flattened array and return whole object or value to specified key
 * e.g. array: [{"idKey": 1, "otherKey": "hello"},
 *              {"idKey": 2, "otherKey": "world"}]
 * @param arr
 * @param key search for this key
 * @param value match searched key's value to desired value
 * @param {string=} keyToReturn return value of this key
 * @returns {*}
 */
function arrGet (arr, key, value, keyToReturn) {
  var result = {};
	for (var i = 0; i < arr.length; i++) {
		if (arr[i][key] === value) {
			result = arr[i];
			break;
		}
	}
	return keyToReturn ? result[keyToReturn] : result;
}