$ perl -Mwarnings -Mdiagnostics -e '@array = (1,2,3); print defined(@array)'
defined(@array) is deprecated at -e line 1 (#1)
    (D deprecated) defined() is not usually useful on arrays because it
    checks for an undefined scalar value.  If you want to see if the
    array is empty, just use if (@array) { # not empty } for example.

##</code><code>##

my $tSida = $sida + 1;
if ((@annots) || (defined @{$links{'-1'}}) || (defined @{$links{$tSida}})) { $sidObjekt .='/Annots ' . mergeLinks() . ' 0 R';
}

##</code><code>##

my $tSida = $sida + 1;
if( @annots || @{$links{'-1'}} || @{$links{$tSida}} ) {
  $sidObjekt .= '/Annots ' . mergLinks() . ' 0 R';
}