Re: printf '%s\n' "$@" versus <<< redirection

[Greg Wooledge]

On Sun, Feb 19, 2023 at 04:07:40PM +0000, Kerin Millar wrote:
> I'll have a go at explaining it. Looking at 
> https://pubs.opengroup.org/onlinepubs/9699919799/utilities/read.html, a 
> particular behaviour is described for the case where the number of fields 
> ends up being greater than the number of specified names, affecting the 
> second, fourth and sixth of your test cases.
> 
> > 
> > unicorn:~$ printf 'n\n' | { IFS='\n' read -r vl; declare -p vl; } 
> > declare -- vl=""
> 
> There is one "n"-terminated field, matching the number of specified names. 
> Its value is "", which is assigned.

Ugh!  It's pitfall 47 again.

https://mywiki.wooledge.org/BashPitfalls#pf47

No matter how many times I run into this, I never remember.  Because it
MAKES NO SENSE.