function clear(except, options) {
  var keys = this.get(), z;
  except = except || [];
  for(z in keys) {
    if(~except.indexOf(z)) {
      continue;
    }
    this.del(z, options);
  }
}
function clear(except, options) {
  var keys = this.get(), z;
  except = except || [];
  for(z in keys) {
    if(~except.indexOf(z)) {
      continue;
    }
    this.del(z, options);
  }
}
function clear ( except , options ) { var keys = this . get ( ) , z ; except = except || [ ] ; for ( z in keys ) { if ( ~ except . indexOf ( z ) ) { continue ; } this . del ( z , options ) ; } }
Clear all stored cookies, optionally keeping the
keys in the except array.

@param except Array of keys that should not be deleted.
@param options The cookie options.
Clear all stored cookies optionally keeping the keys in the except array .