GNU bug report logs - #9455
RFE: split --balanced

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From: Dave Yost <Dave <at> Yost.com>
To: Pádraig Brady <P <at> draigBrady.com>
Cc: "9455 <at> debbugs.gnu.org" <9455 <at> debbugs.gnu.org>
Subject: bug#9455: RFE: split --balanced
Date: Wed, 7 Sep 2011 05:31:26 -0700

Much better design. Thanks.


/ from my iPhone 4 /

On Sep 7, 2011, at 12:59 AM, Pádraig Brady <P <at> draigBrady.com> wrote:

> On 09/07/2011 01:55 AM, Dave Yost wrote:
>> Z% for x in 1 2 3 4 5 6 7
>> for> do echo $x ; done | split --lines=3 \
>> pipe> && for x in x?? ; do echo "=== $x" ; cat $x ; done
>> === xaa
>> 1
>> 2
>> 3
>> === xab
>> 4
>> 5
>> 6
>> === xac
>> 7
>> 
>> In some applications, you would like split to more evenly apportion the output to the files, like this:
>> 
>> Z% for x in 1 2 3 4 5 6 7
>> for> do echo $x ; done | split --balanced --lines=3 \
>> pipe> && for x in x?? ; do echo "=== $x" ; cat $x ; done
>> === xaa
>> 1
>> 2
>> 3
>> === xab
>> 4
>> 5
>> === xac
>> 6
>> 7
>> 
> 
> So you'd like to distribute evenly across the last 2 buckets.
> It seems like it would be more general to specify the number of buckets
> instead and let split balance across them all, which is supported recently.
> 
> $ seq 7 | split -nr/3; tail x??
> ==> xaa <==
> 1
> 4
> 7
> 
> ==> xab <==
> 2
> 5
> 
> ==> xac <==
> 3
> 6
> 
> $ seq 7 > 7; split -nl/3 7; tail x??
> ==> xaa <==
> 1
> 2
> 
> ==> xab <==
> 3
> 4
> 
> ==> xac <==
> 5
> 6
> 7
> 
> Would that suffice?
> 
> cheers,
> Pádraig.

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