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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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Can't unshift

(F) You tried to unshift an "unreal" array that can't be unshifted, such as the main Perl stack.

ISBN 9781906966027Perl Language Reference ManualSee the print edition