1-Dimentional Cellular Automaton

CA.pl

use v6;

class CA {
    has @.data;
    has @.rule;

    method new ($rule, $length, $population) {
        my @data = (1 xx $population, 0 xx $length - $population).pick(*);
        my @rule = $rule.fmt("%08b").flip.comb.map({.Int});
        self.bless(*, data => @data, rule => @rule);
    }

    method next {
        my @ring = @!data[*-1], @!data, @!data[0];
        for ^(@ring.elems-1) {
            state $prev;
            unless $prev.defined {
                $prev = @ring[0];
                next;
            }
            @!data[$_-1] = @!rule[("0b" ~ $prev ~ @ring[$_] ~ @ring[$_+1]).Int];
            $prev = @ring[$_];
        }
        return @!data;
    }
}

sub MAIN (:$rule as Int where { 0 <= $_ <= 255 }, :$length as Int where { 1 <= $_ },
          :$density as Rat where { 0 <= $_ <= 1} , :$generation as Int where { 1 <= $_} ) {
    my $ca = CA.new($rule, $length, ($length * $density).floor);
    say $ca.data;
    say $ca.next for ^$generation;
}

実行例

% perl6 cellular_automaton.pl --length=79 --density=0.05 --rule=90 --generation=20
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