A function to retrieve the value inside an object at a dot-delimited path.

getObjectValueFromDottedNotation.js

function getObjectValueFromDottedNotation(object, dottedString)
{
    /*
	 * Given an object 'object' and a string 'dottedString' that contains a dot-delimited path
     *  down the object's members, return the value at that path or false if the entire path does not exist.
	 *
	 * For example:
	 *	obj = {
     *      "person": {
     *          "name": "john",
     *          "family": {
     *              "mom": "Mary Ann",
     *              "dad": "David"
     *          }
     *      }
     *  }
	 *
	 * getObjectValueFromDottedNotation(obj, "person.family.mom") == "Mary Ann";
	 *
	 * :param: object: A Javascript object.
     *
     * :param: dottedString: A dot-delimited string expressing a path down 'object's members.
	 *
	 * :return: The value inside of 'object' at 'dottedString' or false if no such path exists.
	 */
    
    let keys = dottedString.split(".");
    
    let currentLevel = object;
    
    for (key of keys)
    {
        if (typeof currentLevel !== "undefined")
            currentLevel = currentLevel[key];
    }
    
    if (typeof currentLevel === "undefined")
        return false;
    
    return currentLevel;
}