Re: Use of $@

[alex xmb ratchev]

On Tue, Feb 21, 2023, 1:57 PM alex xmb ratchev <fxmbsw7@gmail.com> wrote:

>
>
> On Tue, Feb 21, 2023, 1:35 PM Christof Warlich <cwarlich@gmx.de> wrote:
>
>> 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 ${!i}. Or if you would
>> > like to extract multiple words in a range, you can use
>> > "${@:i:length}".
>>
>> 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
>>
>
>    l() { declare -i i=1
>   while (( ++i <= $# )) ; do
>  [[ ${!i} == "$1" ]] &&
> printf $i\\n &&
> return
>   done
>    }
>
> l abc def abc def
> 3
>

with (( i-- )) , or any other user algo


Can anyone spot what's wrong?
>>
>> >
>> > --
>> > Koichi
>>
>>