Date: Thu, 5 Dec 2019 11:03:24 +0000 From: Arthur Chance <freebsd@qeng-ho.org> To: Polytropon <freebsd@edvax.de>, freebsd-questions@freebsd.org Subject: Re: Counter in sh inside loop, value "encapsulation" Message-ID: <798639b5-75fb-a82f-c024-4eee8d55e1c5@qeng-ho.org> In-Reply-To: <20191205073531.cb2a23ac.freebsd@edvax.de> References: <20191204181300.8dd0e03c.freebsd@edvax.de> <slrnqug5mi.srf.naddy@lorvorc.mips.inka.de> <20191205051145.78f9a805.freebsd@edvax.de> <20191205073531.cb2a23ac.freebsd@edvax.de>
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On 05/12/2019 06:35, Polytropon wrote:
> For further reference, the simple solution is always the best one.
> I now have the following:
>
> COUNT=0
> for URL in `grep "^https" ${INFILE}`; do
> process ${URL}
> if [ $? -eq 0 ]; then
> COUNT=`expr ${COUNT} + 1`
> fi
> done
> echo "URLs processed: ${COUNT}"
>
> There now is no piping step (and therefore no subshell) involved.
> This works and can be easily extended (more preprocessing from
> the input list file).
>
> I have no idea why I didn't think of this in the first place... :-)
>
A minor point: you can replace
COUNT=`expr ${COUNT} + 1`
with
COUNT=$((COUNT + 1))
to use arithmetic expansion rather than spawning a subshell for the
backticks.
--
What do we want?
A time machine!
When do we want it?
Errm ...
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