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Re: Use of $@

From: Christof Warlich
Subject: Re: Use of $@
Date: Tue, 21 Feb 2023 13:34:37 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.7.1

Am 21.02.23 um 12:06 schrieb Koichi Murase:

It is easy to rewrite the shell function `index' using shift as
Andreas suggests,

Yes, that's probably the solution that I'm going to choose :-).

And, by the way, also thanks to Kerin for pointing out the issue with
sparse arrays, although my use case (currently) would not be affected.

but I assume your true question is about the way to
access $@ with a specified index. You can use ${!i}. Or if you would
like to extract multiple words in a range, you can use

Nevertheless, thanks a lot for getting back to my _real_ question w.r.t.
the usage of $@ compared to a named array: I tried your suggestion
before already, but without success. This is what I tried and what I
would have expected to work:

$ index() { local e="$1"; shift; for i in "${!@}"; do [[ ${!i} != $e ]]
|| { echo $i; break; }; done; }
$ LANG=C index "xx yy" "${myarray[@]}"
bash: a bc xx yy z: invalid variable name

Can anyone spot what's wrong?


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