On Jun 13, 2010, at 6:59 AM, yosi izaq wrote:
>
> On Thu, Jun 10, 2010 at 6:06 PM, Yosi Izaq <[email protected]> wrote:
>> Hi,
>>
>> I'm familiar with the %s/patt//n "trick" to count the # of patterns in
>> the file. I would like to ask how to count the # of paragraphs in a
>> file.
>> My question has 2 flavors:
>> 1. Count free text paragraphs separated by empty lines
>> 2. Count structured paragraphs that have a prefix and suffix
>> delimiters, such as
>> [
>> l1
>> l2
>> l3
>> ]
>>
>> [
>> l4
>> l5
>> ]
>>
>> I tried search as follows: /[\_p\{-}\]
>> and it matches well, however the search I tried didn't match: %s/[\_p\
>> {-}\]/n
I tested against this text:
======= text starts here =======
[
l1
l2
l3
]
[
l4
l5
]
l1
l2
l3
l4
l1
l2
l3
l4
l5
====== text ends here ========
The following command finds four matches on the previous text:
:%s/\(\[\_p\{-}]\)\|\(\%^\|^\n\)\@<=\(\p\+\n\)\{-1,}\ze\(^\n\|\%$\)//n
Explanation:
:%s
/ start pattern
\( start group
\[ literal [
\_p any printable + \n
\{-} 0 or more, as few as posible
\] literal ]
\) end group
\| or
\( start group
\%^ start of file
\| or
^\n an empty line
\) end group
\@<= match starts after previous group
\( start group
\p\+\n a non-empty line
\) end group
\{-1,} 1 or more, as few as posible
\ze match ends before the next group
\( start group
^\n empty line
\| or
\%$ end of file
\) end group
//n
It was fun writing that, but I suppose that somebody else can find a shorter
alternative.
Cheers!
Israel
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