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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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29.26 Z

zero width
A subpattern assertion matching the null string between characters.
A process that has died (exited) but whose parent has not yet received proper notification of its demise by virtue of having called wait ( ) or waitpid ( ). If you fork ( ), you must clean up after your child processes when they exit, or else the process table will fill up and your system administrator will Not Be Happy with you.
ISBN 9781906966027Perl Language Reference ManualSee the print edition