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From: Dan Nelson <dnelson@emsphone.com>
To: mito@aparima.com
Cc: zsh-users@math.gatech.edu
Subject: Re: strange arithmetic
Date: Fri, 28 Nov 1997 20:04:44 -0600	[thread overview]
Message-ID: <19971128200444.42485@emsphone.com> (raw)
In-Reply-To: <19971128153022.58317@retriever>; from "Louis-David Mitterrand" on Fri Nov 28 15:30:22 GMT 1997

In the last episode (Nov 28), Louis-David Mitterrand said:
> > > % i=0;while ! [[ $[++i] < 900 ]];do;echo $i;done
> > > % 1
> > > % 2
> > > [...]
> > > % 90
> > >
> > > Is this normal?
> 
> Thanks to you and zefram, I guess I've been exposed to Perl for a little
> too long (the time I could put off learning shell scripting ;-).
> 
> And to think I thought I had discovered a bug in mighty zsh ..

I'm not sure what Perl has to do with your confusion, unless Perl uses
[[ .. ]] to signify arithmetic evaluation?  I'd check the Perl man
pages, but as they are split into 35 (!!!!!) sections, I won't.  Thank
goodness for "man zshall".

I think [[ ]] is a builtin version of the test command, with more
testing capabilities.

You probably wanted to use the (( )) construct in zsh, to do arithmetic
evaluation of your test.

	-Dan Nelson
	dnelson@emsphone.com


  reply	other threads:[~1997-11-29  2:10 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
1997-11-28 19:09 Louis-David Mitterrand
1997-11-28 19:37 ` Andrew Main
1997-11-28 20:16 ` Alain Caron
1997-11-28 20:30   ` Louis-David Mitterrand
1997-11-29  2:04     ` Dan Nelson [this message]
1997-11-29 14:40       ` Louis-David Mitterrand
1997-11-29 11:44 ` Christopher Croughton

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