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bug#5832: bug#10365: [PATCH] uniq: add ability to skip last N chars or f
bug#5832: bug#10365: [PATCH] uniq: add ability to skip last N chars or fields
Mon, 26 Dec 2011 18:03:40 +0000
Mozilla/5.0 (X11; Linux x86_64; rv:6.0) Gecko/20110816 Thunderbird/6.0
On 12/26/2011 05:39 PM, Paul Eggert wrote:
> On 12/26/11 08:35, Pádraig Brady wrote:
>> supporting --key would not provide this functionality.
> It would support it in the most common cases, no?
> That is, if every line has (say) 10 fields, then
> the proposed 'uniq -F3' would be equivalent to
> the proposed 'uniq -k1,7'.
That's what I thought at first too,
but then why didn't Adrien propose the
more normal --check-fields=7 rather than
the unusual -F3.
> I can't offhand think of good use cases for uniq -F
> that would not be subsumed by uniq -k.
Me too, Having a variable number of fields per line,
but ignoring the last constant N fields is very unusual,
and why I asked for a concrete example.
Personally I'm leaning towards suggesting `the rev| uniq -f | rev`
is fine for this edge case.