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${$scalar_ref}<br>@{$array_ref}<br>%{$hash_ref}<br>
# 良くない例<br>@{$array_ref}[0]<br>%{$hash_ref}{key1}<br>
$array_ref->[0]; # ${$array_ref}[0] と同じ<br>$hash_ref->{key1}; # ${$hash_ref}{key1} と同じ<br>
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