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Postings from December 2021
On Saturday, 18 December 2021, 13:21:03 CET, Oodler 577 via perl5-porters <perl5-porters@perl.org> wrote: > 1. in DBI:: modules, NULL is equivalent to undef I wish that was true, but the behavior of NULL and undef are very different. I've thought about writing a component for this for DBIx::Class, if `undef` values returned `unknown` instead, then the semantics of your Perl would behave much closer to the semantics of the database, eliminating another aspect of the object-relational impedance mismatch. You couldn't catch all of the cases, but there are many you would. Heck, can we even force a warning on `my $foo; $foo++`? I don't think so because I thought that was special-cased in Perl. `my $foo = unknown; $foo++` issues a warning we might often like to see. I'm not saying that `unknown` is always superior (and overloaded objects are *slow*), but in most code dealing with undef that I see, 3VL makes the code both shorter and more correct. I admit that this would probably make Perl radically depart from some other languages, but I'm unconvinced that this would be a Bad Thing. Best, Ovid -- IT consulting, training, specializing in Perl, databases, and agile development http://www.allaroundtheworld.fr/. Buy my book! - http://bit.ly/beginning_perlThread Previous | Thread Next