postorder-flatten.js

// Postorder flatten
var flatten = function (obj) {
  var flat = {};

  function flatt (obj) {
    for (var k in obj) {
      var v = obj[k];
      if ('object' === typeof v) {
        flatt(v);
      } else if ('function' === typeof v) {
        // Ignore
      } else if (v instanceof Buffer) {
        // Ignore
      } else {
        flat[k] = v;
      }
    }
  }

  flatt(obj);
  return flat;
};

var a = {
  b: {
    c: 'a',
    b: {
      c: 'b'
    }
  }
}