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push @{$alldata{$key }}, \%temphash

$hash{$key} = \%temphash;       # $hash{$key} is a reference to %temph
+ash
$hash{$hey} = \@array;          # $hash{$key} is a reference to @array
$hash{$key} = {KEY => 'value'}; #$hash{$key} is a reference to an anon
+ymous hash
$hash{$key} = [1,2,3];          #$hash[$key] is a reference to an anon
+ymous array