I'd like to see one converting ie. 255.255.255.0 -> 24. Seen multiple approaches to this example but I think this one is the most performant:
netMaskToCIDR["0.0.0.0"] = 0 netMaskToCIDR["128.0.0.0"] = 1 netMaskToCIDR["192.0.0.0"] = 2 netMaskToCIDR["224.0.0.0"] = 3 netMaskToCIDR["240.0.0.0"] = 4 netMaskToCIDR["248.0.0.0"] = 5 netMaskToCIDR["252.0.0.0"] = 6 netMaskToCIDR["254.0.0.0"] = 7 netMaskToCIDR["255.0.0.0"] = 8 netMaskToCIDR["255.128.0.0"] = 9 netMaskToCIDR["255.192.0.0"] = 10 netMaskToCIDR["255.224.0.0"] = 11 netMaskToCIDR["255.240.0.0"] = 12 netMaskToCIDR["255.248.0.0"] = 13 netMaskToCIDR["255.252.0.0"] = 14 netMaskToCIDR["255.254.0.0"] = 15 netMaskToCIDR["255.255.0.0"] = 16 netMaskToCIDR["255.255.128.0"] = 17 netMaskToCIDR["255.255.192.0"] = 18 netMaskToCIDR["255.255.224.0"] = 19 netMaskToCIDR["255.255.240.0"] = 20 netMaskToCIDR["255.255.248.0"] = 21 netMaskToCIDR["255.255.252.0"] = 22 netMaskToCIDR["255.255.254.0"] = 23 netMaskToCIDR["255.255.255.0"] = 24 netMaskToCIDR["255.255.255.128"] = 25 netMaskToCIDR["255.255.255.192"] = 26 netMaskToCIDR["255.255.255.224"] = 27 netMaskToCIDR["255.255.255.240"] = 28 netMaskToCIDR["255.255.255.248"] = 29 netMaskToCIDR["255.255.255.252"] = 30 netMaskToCIDR["255.255.255.254"] = 31 netMaskToCIDR["255.255.255.255"] = 32
Would save a lot of code deduplication by adding this to the helper function library.
/Patrik
Credit goes to Hawkeye who suggested this in my PR.