sub ST(&@){
        my $metric=shift;
        map {$_->[0]}
        sort {$a->[1] cmp $b->[1]}
        map {[$_,&{$metric}]} @_
}
my @versions = qw(2.0.0 1.0.9 1.0.10 1.1.0 1.1.2); 
@versions = ST {pack'C*',split/\./} @versions;
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