Sub Routine in a Variable ???


I would like my Perl program to run a subroutine
that I have stored in a variable without having to
write it to disk. Is there a way to do that?The following doesn't work:

my $routine = "sub MySub{  print  \"hello from a sub in a variable!\";   }";

&$routine;

I get the following message:
Undefined subroutine &main::sub MySub{  print  "hello from a sub in a variable!";   } called at test.p line 8.

Again, I can't write it to disk and then use Require.
Thanks for any help!
jgoreAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

baltmanCommented:
I don't think it is possible. A subroutine needs to be defined somewhere before it can be executed.

Why would you want to do this? Is the subroutine always different? Can't you just put the subroutine in the script with lots of variables which you can change without saving anything on a disk? Maybe you could give some more details?

Again, variables can be placed in a subroutine, not the other way around. The subroutine needs to exist before it is executed....

BA
0
ozoCommented:
my $routine = sub {  print "hello from a sub in a variable!";   };    

&$routine;
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
jgoreAuthor Commented:
This is more what I meant (This Works):

my $routine = "sub MySub{  print  \"hello from a sub in a variable!\";   }";
my ($routinename)=($routine =~ m/sub (.*?)\{/);
eval $routine;
&$routinename;

This way you can load routines into variables with nothing
being hard-coded. You could even make routines on-the-fly!
Can we say "A I ?" ;-)
I really just wanted a way to load perl code from a
text config file in which the code may be changed depending
on a seperate program (a Visual Basic config program). Now
my perl program can load perl code from a config file
and run it without having to know in advance anything
about the code (nothing hard-coded).
In any case, thanks everyone!
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Perl

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.