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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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Smart matching a non-overloaded object breaks encapsulation

(F) You should not use the ~~ operator on an object that does not overload it: Perl refuses to use the object's underlying structure for the smart match.

ISBN 9781906966027Perl Language Reference ManualSee the print edition