Created
December 7, 2012 08:45
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perl6 Set operators
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use v6; | |
my @data = '10', '{1, 2, 3, 4, 5}', '{2, 8, 5, 10}'; | |
my Set $N .= new: 1 .. @data.shift.Int; | |
my Set $A .= new: eval @data.shift.subst(/<[{}]>/, '', :g); | |
my Set $B .= new: eval @data.shift.subst(/<[{}]>/, '', :g); | |
sub infix:<∩>(Set \A, Set \B) { Set.new: B.list.grep: * eq any A.list } | |
sub infix:<∪>(Set \A, Set \B) { Set.new: |$A.list, |$B.list } | |
sub infix:<->(Set \A, Set \B) { Set.new: grep none(B.list), A.list } | |
sub prefix:<not>(Set \A) { $N - A } | |
sub show(Set \A) { say '{', A.list.join(', '), '}' } | |
show $A ∪ $B; | |
show $A ∩ $B; | |
show $A - $B; | |
show $B - $A; | |
show not $A; | |
show not $B; |
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