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$allowed{action} = 'post|edit|delete|long|short';
$query->{action} eq "post"
...
  return 0 if $query->{$key}!~/$allowed{$key}/;
  1;
}

# Map keys to coderefs (used sort of like a switch statement)
my %ActionMap =
...
for my $key (keys %$query){
  return 0 unless exists $allowed{$key} && $query->{$key} =~ /$allowed
+{$key}/;
}