The fact that "${a[@]@K}" expands to a single word is surprising to me.
I know someone else already mentioned it in this thread (sorry, I forgot
who it was), but it would be nice if there were a similar one that gave
a list of multiple words.
unicorn:~$ printf '<%s> ' "${a[@]@Q}"; echo
<'1'> <'2'> <'3'>
unicorn:~$ printf '<%s> ' "${a[@]@U}"; echo
<1> <2> <3>
unicorn:~$ printf '<%s> ' "${a[@]@L}"; echo
<1> <2> <3>
unicorn:~$ printf '<%s> ' "${a[@]@E}"; echo
<1> <2> <3>
unicorn:~$ printf '<%s> ' "${a[@]@K}"; echo
<0 "1" 1 "2" 2 "3">
It really sticks out.
