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

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Ignoring zero length \N{} in character class

(W) Named Unicode character escapes (\N{...}) may return a zero length sequence. When such an escape is used in a character class its behaviour is not well defined. Check that the correct escape has been used, and the correct charname handler is in scope.

ISBN 9781906966027Perl Language Reference ManualSee the print edition