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perl -wMstrict -MData::Compare -E 'my @a=qw(1 2 a b); my @b=qw(1 2 a b +); say Compare(\@a, \@b);' 1 perl -wMstrict -MData::Compare -E 'my @a=qw(1 3 a b); my @b=qw(1 2 a b +); say Compare(\@a, \@b);' 0