Find property by name in a deep object

findPropertyInDeepObj.js

function findPropertyInDeepObj(obj, key) {
    if (_.has(obj, key)) 
        return [obj];
    var res = [];
    _.forEach(obj, function(v) {
        if (typeof v == "object" && (v = findPropertyInDeepObj(v, key)).length)
            res.push.apply(res, v);
    });
    return res;
}