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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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Empty %s

(F) \p and \P are used to introduce a named Unicode property, as described in "Unicode support in Perl" (perlunicode) in the Perl Unicode and Locales Manual and 11. You used \p or \P in a regular expression without specifying the property name.

ISBN 9781906966027Perl Language Reference ManualSee the print edition