Re: Compare files, save differences

Hi Jeri!

On Mo, 21 Apr 2014, Jeri Raye wrote:

> Hi,
>
> I have a file allwords.txt.
> And I have another file mywords.txt
>
> How can I filter the differences, and safe them in another file called
> difwords.txt?
>
> Example:
> +------ allwords.txt -------+
> James
> Richard
> Anna
> Claude
> Ben
> +------------+
>
> +------mywords.txt-----+
> Anna
> Ben
> +-------------------+
>
> This should then make the following file
>
> +------difwords.txt-----+
> James
> Richard
> Claude
> +-----------+

That is what external commands are good for. I would use comm(1)

#v+
/tmp/compare % comm -23 <(sort allwords.txt) <(sort mywords.txt)
Claude
James
Richard
/tmp/compare %
#v-

Best,
Christian
--
Nicht die Frau, die Kinder binden den wagenden Mut, weil wohl jene mit
uns tragen kann, da sie sich mit uns entschließt, diese aber noch
keine Kräfte zum Entschließen und Tragen haben.
-- Jean Paul

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