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Re^2: True or False? A Quick Reference Guide

by Juerd (Abbot)
on Oct 25, 2005 at 06:43 UTC ( #502640=note: print w/replies, xml ) Need Help??

in reply to Re: True or False? A Quick Reference Guide
in thread True or False? A Quick Reference Guide

Perl 6:

0/FALSE: 0, "0", "", undef ("0" is true if the type is Str) 1/TRUE: everything else AND OR XOR NOT +& +| +^ +^ <-- bitwise, numeric ~& ~| ~^ ~^ <-- bitwise, string ?& ?| ?^ ?^ <-- bitwise, boolean && || ^^ ! <-- logical, high precedence and or xor not <-- logical, low precedence
  • The difference between logical and bitwise boolean is that logical AND and OR return an operand, while bitwise AND and OR return boolean values (the original values are lost).
  • ?^/^^, and ?^/! are practically the same.
  • ^^ was missing in Perl 5.
  • +^, ~^, ?^ are both XOR and NOT, depending on whether they are used infix (in between) or prefix (in front).

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[1nickt]: What do you all think of experimental = refaliasing ? Anyone using it?
[1nickt]: \my %foo = { bar => 1 }; say $foo{bar};
[Corion]: 1nickt: Would be great, especially for naming parameters in @_.
[Corion]: When you pass an arrayref, you get to treat it like a local array. But then, I'm cautious with the experimental features, because just when I thought function signatures were a set thing, there is a proposal to use sub [ $foo, $bar ] { ... } to ...
[Corion]: ... declare the parameters, instead of the more common sub ($foo, $bar) { ... }

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