On 06/08/2015 05:14 AM, Stephane Chazelas wrote: > Maybe there's a way to allow that without having to implement > the specifics in sort. > > Like sort key flags to invoke commands: > > sort '-k1,1|ip2hex' '-k2,2n|roman2int' '-k3,3|iconv -t us//TRANSLIT'
That would result in a LOT of process overhead (one command spawned per sort key per line). True, it would be more generic, but the performance would suffer compared to having a direct way to do the sorting within the current process. It's going to be more efficient to do a single pre-process pass, then sort, then post-process, with a complicated script language doing the right processing per field in a single pass, than to do one conversion per key per row. -- Eric Blake eblake redhat com +1-919-301-3266 Libvirt virtualization library http://libvirt.org
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