Method ADT.Sequence()->_search()

Method _search: int _search(mixed value, void|int start)
Description: Search the sequence for a specific value. Return the index of the first value that is equal to value . If no value was found UNDEFINED is returned instead.
Parameter value: The value to find.
Parameter start: If a start value is supplied it will start searching at the index start .
Returns: Returns the index of the found value or UNDEFINED.