Re: How to count the number of lines in a string?

["Patrick Donnelly" <batrick.donnelly@...>]

On Thu, Jul 31, 2008 at 5:47 AM, Jerome Vuarand
<jerome.vuarand@gmail.com> wrote:
> 2008/7/31 Luiz Henrique de Figueiredo <lhf@tecgraf.puc-rio.br>:
>>> what is the most efficient way of counting the number of lines?
>>
>> Try this one:
>>
>> local n=0
>> for i in s:gmatch("\n") do n=n+1 end
>> print(n)
>
> Also:
>
> local n = select(2, s:gsub('\n', '\n'))
>

You can make it so just an empty string is pushed if there is at least
one newline:

local n = select(2, s:gsub("[^\n]*\n[^\n]*", ""))

I haven't benchmarked it though.

Cheers,

-- 
-Patrick Donnelly

"One of the lessons of history is that nothing is often a good thing
to do and always a clever thing to say."

-Will Durant