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bug#24929: comm enhancement proposal: --print-summary --quiet
From: |
Pádraig Brady |
Subject: |
bug#24929: comm enhancement proposal: --print-summary --quiet |
Date: |
Thu, 17 Nov 2016 10:32:16 +0000 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.2.0 |
On 17/11/16 10:18, Bernhard Voelker wrote:
> On 11/17/2016 11:12 AM, Pádraig Brady wrote:
>> Usually you'd want counts separately from each other
>> and separate from the data itself, in which case wc -l suffices:
>>
>> $ echo Lines in both = $(comm -12 file1 file2 | wc -l)
>> $ echo Lines only in 1st = $(comm -23 file1 file2 | wc -l)
>> $ echo Lines only in 2nd = $(comm -13 file1 file2 | wc -l)
>>
>> So this is in the efficiency/convenience category.
>
> You mean to change the --total flag to accept an argument?
>
> $ echo Lines in both = $( comm -123 --total=3 file1 file2)
> $ echo Lines only in 1st = $(comm -123 --total=1 file1 file2)
> $ echo Lines only in 2nd = $(comm -123 --total=2 file1 file2)
>
> and
>
> $ echo Lines only in 1st or 2nd = $(comm -123 --total=1,2 file1 file2)
Sorry I meant if you only wanted a single count,
then the existing tools suffice.
Your implementation is fine as is I think.
thanks,
Pádraig
bug#24929: comm enhancement proposal: --print-summary --quiet, 積丹尼 Dan Jacobson, 2016/11/18