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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 coerce %s to integer in %s

(F) Certain types of SVs, in particular real symbol table entries (typeglobs), can't be forced to stop being what they are. So you can't say things like:

*foo += 1;

You CAN say

$foo = *foo;
$foo += 1;

but then $foo no longer contains a glob.

ISBN 9781906966027Perl Language Reference ManualSee the print edition