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RE: Building a byte to test truth table

by dchetlin (Friar)
on Nov 02, 2000 at 02:23 UTC ( #39521=note: print w/replies, xml ) Need Help??


in reply to Building a byte to test truth table

Why not do real bitwise math?

$byte = 0; $byte |= 1 if $obj->{organization} =~ /\S/; $byte |= 1<<1 if $obj->{foo} =~ /\S/; $byte |= 1<<2 if $obj->{bar} =~ /\S/; ... $byte |= 1<<7 if $obj->{report} =~ /\S/; # Here are your checks, rewritten as bitmasks if ($byte & 1<<7 and not $byte & 7<<1) { # do more checks against database } elsif (not $byte & 15<<4 and $byte & 1<<3 and not $byte & 3) { # do other checks against database } else { # produce error message }

Update: while I was checking my solutions, several people already gave the right answers. Specifically, tye's looks nice to me. I'm leaving this here only for completeness' sake.

-dlc

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[usemodperl]: sorry veltro, venting...
[usemodperl]: (is that wrong marto?)
[aitap]: usemodperl: maybe it's you who has changed
[marto]: demonstrably yes, since you claim to want a safe space, your definition for which seems to be a place where you can name call, make things up or otherwise post without being challenged
[usemodperl]: no that's not it at all, meant safe for perl people, to not be hounded by weirdos obsessed with things like... whitespace :-)
[choroba]: I'm definitely not obsessed with whitespace, I rate myself among Perl people, and I haven't noticed any hounding
[marto]: "no it's not that"...."weirdos "...
[marto]: List EXE_FILES installed by CPAN so a couple of people suggest that your code looks obfuscated. I'd have to ageree, from the perspective of those who can't follow all of that one liner, it doesn't read well
Veltro is a weirdo, obsessed with whitespace

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