$ perl -MPath::Tiny -E 'for my $dir ( split(/:/,$ENV{PATH}) ){say for grep {-f -x $_} path($dir)->children }'

##</code><code>##

$ print -l "${(@k)commands}" | sort | tail
zipinfo
zipnote
zipsplit
zless
zmore
zmqshell.py
znew
zprint
zsh
zsh-5.8
$ print $commands[zsh]
/usr/local/bin/zsh