Beefy Boxes and Bandwidth Generously Provided by pair Networks
Perl: the Markov chain saw

Re: Why are closures cool, continued?

by perrin (Chancellor)
on Jan 19, 2002 at 03:10 UTC ( #139990=note: print w/replies, xml ) Need Help??

in reply to Why are closures cool, continued?

That's a very confusing example because it looks like an object but isn't. That example would still work if you remove the OO looking stuff:
#!/usr/local/bin/perl use strict; my $dave = subref("dave", "oranges", "grapefruit"); $dave->("debug message"); sub subref { my (@stuff) = @_; return sub { doit(@stuff, @_) }; # <-- closure here? } sub doit { print shift, ": ", join(",", @_), "\n"; }
Yes, it is a closure, but it's also an anonymous sub ref, so it's showing multiple things. Here's a much simpler closure:
my $foo; sub bar { $foo++; }
After execution, bar() has a private copy of $foo. TheDamian uses this in his book to do private variables for classes.

Log In?

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://139990]
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others wandering the Monastery: (4)
As of 2016-10-25 06:27 GMT
Find Nodes?
    Voting Booth?
    How many different varieties (color, size, etc) of socks do you have in your sock drawer?

    Results (315 votes). Check out past polls.