Re: sed with Variable Substitution in the command

[Greg Wooledge]

On Fri, Sep 27, 2024 at 13:35:04 +0200, alex xmb sw ratchev wrote:
> huuuu , yeah fail test
> 
> {13..1}
> bash returns wrong 1 at end for $11
> yes
> uhhhhh ... how ' new ' or ' old ' is this

It's *extremely* old.

hobbit:~$ echo "$BASH_VERSION"
2.05b.0(1)-release
hobbit:~$ set -- a b c d e f g h i j k l m n o
hobbit:~$ echo "$11"
a1

It goes back to the original Bourne shell as far as I know.

> but gawk says it got it right , $11 being 3
> 
> a=( {13..1} ) ; gawk <<<${a[*]} ' { print $11 } '
> 
> weird .. i might have suxxed that knowledge from long ago ...
> hmm

Yes, awk and shell syntax *look* similar in many cases where they actually
have different behaviors.  It's easy to get a bit confused when you're
mixing languages.