code: function remove(obj, keep) {
    if (!obj) return false;
    keep = keep || [];
  
    for (var prop in obj) {
      if (has.call(obj, prop) && !~keep.indexOf(prop)) {
        delete obj[prop];
      }
    }
  
    return true;
  }
docs: Remove all enumerable properties from an given object.
  
  @param {Object} obj The object that needs cleaning.
  @param {Array} keep Properties that should be kept.
  @api public