hello people,
I have this steps() function implemented this way in shell:
steps() sed -r ':b p; s,/[^/]+$,,; t b'
# demo:
<<. steps | xargs ls -lUd
/var/log/messages
which shows
-rw-r----- 1 root adm 464304 Sep 3 19:03 /var/log/messages
drwxr-xr-x 22 root root 4096 Sep 3 00:00 /var/log
drwxr-xr-x 14 root root 4096 Jun 19 2021 /var
for those who don't know sed that much, the perl equivalent is:
steps() perl -lpe 'do {print} while s,/[^/]+$,,'
I thought the raku one could be shorter but for now I'm stuck
with a very long solution.
my \path = [ "/var/log/messages" .split: "/" ];
.say for (^path).map( { path[0..$_].join: "/" } )[1..*];
I'm pretty sure I saw a very concise and elegant way to transform
( A B C ) to ((A) (A B) (A B C)) in the past but I'm enable to figure
out how. Any help on that ?
thanks by advance.
--
Marc Chantreux
Pôle de Calcul et Services Avancés à la Recherche (CESAR)
http://annuaire.unistra.fr/p/20200
