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Re^3: How to sort IP addresses

by AltBlue (Chaplain)
on Jan 31, 2007 at 10:37 UTC ( [id://597519]=note: print w/replies, xml ) Need Help??


in reply to Re^2: How to sort IP addresses
in thread How to sort IP addresses

Hm, golfing with GRT? No idea how, but anyway, here's a possible starting point:
$ perl -le '$,=$/; print @ARGV[ map { unpack N, substr $_, -4 } \ sort map { eval("v$ARGV[$_]") . pack N, $_ } 0 .. $#ARGV ]' \ 1.2.1.1 1.1.1.1 1.11.1.1 1.1.1.66 1.1.1.9 1.1.1.1 1.1.1.9 1.1.1.66 1.2.1.1 1.11.1.1
OTOH, that previous version could easily be golfed (ok, just a little) by dropping the initial map (which is useful only when using this snippet "for real" - you know, using sprintf and returning a list):
$ perl -e 'printf "%vd\n", $_ for sort map { eval "v$_" } @ARGV' \ 1.2.1.1 1.1.1.1 1.11.1.1 1.1.1.66 1.1.1.9 1.1.1.1 1.1.1.9 1.1.1.66 1.2.1.1 1.11.1.1

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