I wrote a useful NQE query with no help! Could it be more efficient?

Question

I finally managed to write a useful NQE query with no help. Yay! This query lists all of the loopback interfaces and their IP addresses. I tested it, and it works. But I am curious if there is a more efficient or elegant way to enumerate the IP addresses. Seems to me a little clumsy.

getSubIfaceIpInfos(iface) =
	foreach subIface in iface.subinterfaces
	foreach subnet in subIface.ipv4.addresses select subnet;

foreach device in network.devices
foreach interface in device.interfaces
where interface.loopbackMode
let ifaceSubnets = getSubIfaceIpInfos(interface)

select {
  deviceName: device.name,
  interfaceName: interface.name,
  ipAddress: foreach subnet in ifaceSubnets select ipSubnet(subnet.ip, subnet.prefixLength)
}

jack.shen · Accepted Answer

This query can definitely be re-written to be more user-friendly.

foreach device in network.devices
foreach int in device.interfaces
where int.loopbackMode
select {
  name:device.name, 
  int: int.name,
  ipAddress: max(foreach sub in int.subinterfaces select sub.ipv4.addresses)
}

I wrote a useful NQE query with no help! Could it be more efficient?

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