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Another of my many blindspots has risen up and bitten me. I thought I understood grep $person_has eq $_, $item {...} to mean: search $person_has for the value of the current default variable (set in a previous statement) and return true if that matches $item. I've also explored the only alternate meaning I've been able to conjure up... namely: search through the string $person_has and return true if any part of that string would match any part of $item. Clearly, my understanding is incorrect, but despite perusing perldoc, Intermediate Perl, Programming Perl, several estimable web resources, -MODeparse and, of course, many of the very numerous nodes found by Super Search comprehension eludes me. FWIW, this snippet is what's giving me grief:
...which reports total failure to match any $item to any element of @required. In other words, it executes line 7 in every case, even in cases in which line 6 clearly shows that $person_has includes an exact match for $item. In the complete script -- which is a lengthy self-imposed elaboration on code developed in Chapter 4 of Intermediate Perl -- I use strict and warnings and receive no reports of either. Further, I have used <c>Data::Dumper<c> and the debugger to verify that the variables contain what I intended/expected. Can some great teacher lift the scales of blindness from my eyes, by offering a clearer (to me!) explanation of the real meaning of the construct (or, if it pinpoints my misunderstanding, the proper construct)? In reply to (Mis)Understanding grep...eq $_ by ww
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