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Perl???????????????????????????????????????????????????????????

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my $x = 2;my @array = (1, 2, 3);my $flag = 0;for (@array) {    if ($x == $_) {        $flag = 1;    }}if ($flag == 1) {    print "$x is in the array;";} else {    print "$x is not in the array;";}

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my $x = 2;my @array;if (@array~~$x) {    print "$x is in the array;";} else {    print "$x is in the array;";}

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'hello'~~{hello => 1, world => 2}

??? true?????????????

???????????Perl????????????????????????????

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