search javascript objects by name

grep.js

var grep = function(o, n) {
  var s = "";
  if (typeof o === "string") {
    n = o;
    o = window;
    s = "window"
  }

  function actualGrep(o, n, s) {
    Object.keys(o).forEach(function(k) {
      var v = o[k];
      if (k == n) {
        console.log("%s.%s -> (%o) %o", s, k, typeof v, v);
      }

      if (("" + v) == "[object Object]" && k != "window" && s.split(".").indexOf(k) == -1) {
        actualGrep(v, n, (s ? s + "." : "") + k)
      }
    });
  }
  actualGrep(o, n, s);
}