Beefy Boxes and Bandwidth Generously Provided by pair Networks
go ahead... be a heretic
 
PerlMonks  

Re: a sub within a sub -- revisiting

by Anonymous Monk
on Apr 10, 2010 at 04:14 UTC ( #833943=note: print w/ replies, xml ) Need Help??


in reply to a sub within a sub -- revisiting

bar is still visible outside of foo, so make it lexical

sub foo { my $bar = sub { my ($i) = @_; push @arrb, $arra[$i]; }; $bar->($#arra); ... }


Comment on Re: a sub within a sub -- revisiting
Download Code
Re^2: a sub within a sub -- revisiting
by ikegami (Pope) on Apr 11, 2010 at 06:21 UTC

    Note that the above leaks if the anon sub accesses $bar. That would be the case if the anon sub is recursive, for example. I find the following simpler, and it doesn't leak.

    sub foo { ... local *bar = sub { ... }; bar(...); }

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://833943]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others wandering the Monastery: (12)
As of 2014-09-30 16:53 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    How do you remember the number of days in each month?











    Results (378 votes), past polls