Quote:
Originally Posted by myce
Well, yes and no. Had the publisher decided to use spaces instead of dashes, your suggestion would still find the number 13 978 0471 73278 5 which wouldn't be valid without parsing all substrings of 13 digits length.
|
have you seen a book written ISBN 10 or ISBN 13 ?
ISBN and ISBN13 are more normal (ISBN 10 is redundant. ISBN is 10 chars)