Re: search for output of shell command

On 06/20/2010 08:01 AM, yosi izaq wrote:
>> For your particular use-case, I'd use vim's internal strftime() function:
>>
>> :nnoremap<f4> /^<c-r>=strftime('%d')<cr><bslash>><cr>
>> :cnoremap<f4> <c-r>=strftime('%d')<cr>
> This works well. Can you please kindly explain why the 2nd line?

You can see that it's just a subset of the previous command, the
part that inserts the current day-of-the-month into the current
search or the command-line.

>> You don't mention what single-digit dates look like in your file (whether
>> they are left-justified, or padded with spaces or a leading zero).
> This is the matching pattern ^20$

Today...the question revolves around what happens on the 1st
through 9th? Do you need to search for "^01" or "^ 1" (with a
leading space) or "^1"?

>> So you
>> might have to use "%e" (pad with spaces) instead of "%d" (pad with a zero)
>> or strip the unwanted stuff:
> %d works perfect

Again, for the 10th-31st, it's not a problem. Just the 1st-9th
where you need to make the search match what your file has.

>> system("date | awk '{print $3}'")
>>
>> however, that returns the trailing newline, so you'd have to clean that out:
>>
>> substitute(system("date | awk '{print $3}'"), '\D', '', 'g')
>>
>>
> I get: E486: Pattern not found: system

These are expressions, and as such need to be entered with the
"control+R followed by =" expression register:

:help @=

Hope this helps,

-tim

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