jSQL count function

count

count: function(key) {
  var count = 0, scope = key.split('.');
  if(key === '*')
    this._buffer = this._currentDB;
  for(var key in this._currentDB) {
    if (this._currentDB.hasOwnProperty(key)) {
    var tmp = this._currentDB[key];
    for(var i=0,j=0; i<(j=scope.length); i++) {
        tmp = tmp[scope[i]];
	if(!!tmp && i == j - 1) count++; 
    }	
  }

  return count;
}