Re: How to replace pattern with shell command's output using matched pattern

On 2021-09-04, rwmit...@gmail.com <rwmitchell@gmail.com> wrote:
> I'm just curious, is the file being otherwise edited in vim? I usually
> just use less to view logs, in which case, a command line filter would be
> more efficient (for me).

Thanks that's a good suggestion in general. In this case, yes, I am
going to perform more editing.

> On Saturday, September 4, 2021 at 11:23:28 AM UTC-4 Tim Chase wrote:
>
>> On 2021-09-04 14:07, Andreas Perstinger wrote:
>> > Alternatively, without using an external command:
>> >
>> > :%s_^\[\(\d\+\)_\="[" . strftime("%c", submatch(1))_
>>
>> This is much better than the suggestion I gave, keeping it all
>> internal to vim. To clean it up, I'd tweak it to
>>
>> :%s/\[\zs\d\+\ze\]/\=strftime("%c", submatch(0))

Learning Vim is a never-ending experience: I didn't know (or remember)
about submatch()!

Can you explain why \zs... \ze is to be preferred to capturing with \(
and \)?

Thanks,
Life.

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