code: function (entry) {
  	
  	if (typeof entry !== 'string')
  		return false;
  	
  	for (var i=0; i < l_entries.length; i++)
  		if (l_entries[i] === entry)
  			break;
  	
  	// store only if it's new entry
  	if (i === l_entries.length) {
  		l_entries.push(entry);	
  		return true;
  	}
  	
  	return false;
  }
docs: add entry to list (but only if it's unique)