- publishing free software manuals
Perl Language Reference Manual
by Larry Wall and others
Paperback (6"x9"), 724 pages
ISBN 9781906966027
RRP £29.95 ($39.95)

Sales of this book support The Perl Foundation! Get a printed copy>>>

Can't modify nonexistent substring

(P) The internal routine that does assignment to a substr() was handed a NULL.

ISBN 9781906966027Perl Language Reference ManualSee the print edition