On Wed, 1 Jul 2009 18:40:00 +0100, Alexandre Vieira <nul...@gmail.com> wrote:
> Hi folks,
>
> I'm having a little problem.
>
> For exambe in ksh:
>
> $ z=0
> $ y=1
> $ x=aaaa
> $ eval `echo MACHINE_DISK$z[$y]`=$x
> $ echo ${MACHINE_DISK0[1]}
> aaaa
>
> My problem is getting back the value of the variable using variables to
> refer to the variable name (confusing). I.e $MACHINE_DISK$z[$y] .
>
> Using ${} works great when you only have a simple array but adding a
> variable in the middle of the variable name seems to ruin it.
>
> $ echo ${MACHINE_DISK0[$y]}
> aaaa
> $ echo ${MACHINE_DISK$z[$y]}
> ksh: ${MACHINE_DISK$z[$y]}: bad substitutionMy own short piece of (slightly off-topic) advice is: ``If you find yourself using arrays in bash, ksh or another shell, now is a *very* good time to consider a more advanced scripting language, like Perl or Python.'' Trying to coerce shell quoting to do a sensible thing with array syntax is error-prone, annoying and --very often-- a waste of your time: Using an interactive language like Python you can actually *test* the code as you are writing it. This is a major win most of the time. _______________________________________________ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
