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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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8.2 Persistent Private Variables

There are two ways to build persistent private variables in Perl 5.10. First, you can simply use the state feature. Or, you can use closures, if you want to stay compatible with releases older than 5.10.

ISBN 9781906966027Perl Language Reference ManualSee the print edition