|Learning Perl, 3rd Ed (paper), Schwartz & Phoenix, p26.
no offense against Merlyn or O'Reilly ... but this should be clearly documented in the perldocs and for all affected operators and not only in the section for "unary -".
And yes I missed the warnings .. I was recently playing around with shells of 4 other dynamic languages and the perl-debugger surprised me in not showing warnings by default.
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