Re^2: Sorting Hash Value Object's IPv4 Address

Good solution , and this is what I was too lazy to code, in my earlier post.

However, shouldn't the sort use the spaceship operator (<=>) rather than cmp, since the items being compared are numeric ?

"I can cast out either one of your demons, but not both of them." -- the XORcist

Comment on Re^2: Sorting Hash Value Object's IPv4 Address

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Re^3: Sorting Hash Value Object's IPv4 Address by johngg (Canon) on Jan 30, 2016 at 12:38 UTC
That's what I initially assumed when I started coding this but you get a shed load of `Argument "^CM-^V" isn't numeric in numeric comparison (<=>) at ...` [download] warnings when you use `<=>`. That's because `inet_aton()` is actually returning a packed string. Consider the following:- `johngg@shiraz:~/perl/Monks > perl -MSocket -E ' > say ord for split m{}, inet_aton( q{192.168.45.92} );' 192 168 45 92 johngg@shiraz:~/perl/Monks > perl -E ' > say ord for split m{}, pack q{C4}, split m{\.}, q{192.168.45.92};' 192 168 45 92 johngg@shiraz:~/perl/Monks >` [download] Therefore the `cmp` comparison is more appropriate. Cheers, JohnGG	[reply] [d/l] [select]
Re^4: Sorting Hash Value Object's IPv4 Address by NetWallah (Canon) on Jan 30, 2016 at 21:22 UTC
Thanks for the enlightenment (++). I learned something today (always good). "I can cast out either one of your demons, but not both of them." -- the XORcist	[reply]


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