> my $perl = Date.new: '1987-12-18' # Perl 1 release[1]
1987-12-18
> my $perl6 = Date.new: '2000-07-18' # Perl 6 announcement[2]
2000-07-18
> Date.today - $perl6
4596
> $perl6 - $perl
4596Normally, I wouldn’t put irrelevant snippets of code[citation needed]. But this day is different - we have Perl 6 equidieversary (thanks, moritz). It’s 4596 days since Perl 6 was announced (Wikipedia says it was annouced 2000-07-19, but actually it was earlier). In 2000-07-19, Perl was 4596 days old. But I won’t discuss about this more, as masak already made perfectly fine article about that.
Let’s return to your regularly scheduled program.
Sets and Bags do not flatten in list context.
Metaoperators are treated as normal operators, and aren’t making list of closures. So, for example @array X* * is -> $arg { @array X* $arg }.
Inner classes and roles must be lexically scoped.
Added List.combinations and Set.combinations.
Added Set.powerset. It’s defined like that.
multi method powerset { set ∅, self.combinations }$_ is writable in -n/-p code (one-liner).eqv is faster for Buf objects.