A simple implementation of retrieving the value of an object's property via its stringkey

retrieve-value-via-stringkey

getProperty = function(obj, stringKey) {
    var parts           = stringKey.split('.'),
        returnCurrent   = null,
        current         = '',
        i               = 0;
        
    if (!stringKey) {
	    return obj;
    }

    returnCurrent = function(obj) {
        if (!obj) {
            return null;
        } else {
            return obj[current];
        }
    };

    while (i < parts.length) {
        current = parts[i];

        obj = returnCurrent(obj);

        i++;
    }

    if (typeof obj !== 'undefined') {
        return obj;
    } else {
        return null;
    }
};