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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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Variable length lookbehind not implemented in m/%s/

(F) Lookbehind is allowed only for subexpressions whose length is fixed and known at compile time. See 11.

ISBN 9781906966027Perl Language Reference ManualSee the print edition