Ingo Schwarze wrote in <[email protected]>:
..
|Ralph Corderoy wrote on Sun, Dec 09, 2018 at 10:36:25AM +0000:
..
|> The time-honoured way to achieve this is using the built-in `set'.
|>
|> $ l='foo bar xyzzy'
|> $ set -- $l; for f; do echo f=$f; done | fmt
|> f=foo f=bar f=xyzzy
|> $
|[...]
|> $ l=
|> $ set -- $l; for f; do echo f=$f; done | fmt
|> $ set -- $l; for f; do echo f=$f; done | wc -c
|> 0
|> $
|
|Good point, indeed i wasn't aware of that technique.
|Arguably, using it is less intrusive than deleting the very likely
|usused variables.
Note "for x; do" is new in current POSIX. It needs to be
for f
do
ddd
instead if portability is an issue.
--steffen
|
|Der Kragenbaer, The moon bear,
|der holt sich munter he cheerfully and one by one
|einen nach dem anderen runter wa.ks himself off
|(By Robert Gernhardt)
