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while( my ($ip, $h) = each %ips ){ printf "%s,%d,%d\n", $ip, $h->{colPartitionSize}, $h->{colPartitionF +ree}; ... } printf "%s,%d,%d\n", $_, $ips{$_}->{colPartitionSize}, $ips{$_}->{colP +artitionFree} for keys %ips;