How do I create a reference to an object method?

skrapasor has asked for the wisdom of the Perl Monks concerning the following question:

I want to put a reference to a method of my object as a value in a hash. Here is what I've tried:


my $action = { 
 
        'dosomething' => $object->something 
 
};
[download]

I'm doing this so a user can enter a command and the object will call the method. I just want a reference to put in the hash, right? Here is the page I was on in case you are wondering: here BTW: The way I do it doesn't work, the arrow operator dereferences the method I think.

Comment on How do I create a reference to an object method? Download Code

Replies are listed 'Best First'.
Re: How do I create a reference to an object method? by kyle (Abbot) on Jun 25, 2008 at 19:31 UTC
If you want to call the method on that particular object, I think the closure solution is best. `my $action = { doit => sub { $object->it( @_ ) } };` [download] That way, you can call `$action->{doit}->( ... )`, and it's the same as calling `$object->it( ... )`. That's nice if you want to forget about the particular object. If you want a reference to the sub that would be called, you can use UNIVERSAL`::can`: `my $action = { doit => $object->can( 'it' ) };` [download] In that case, you'd have a reference to the method, but the object itself is not in your hash. To call it as an instance method as above, you'd have to `$action->{doit}->( $object, ... )`. That's nice if you want to call it with different objects.	[reply] [d/l] [select]
Re^2: How do I create a reference to an object method? by ysth (Canon) on Jun 26, 2008 at 02:02 UTC
To call it as an instance method as above, you'd have to `$action->{doit}->( $object, ... )` or `$object->${\$action->{doit}}(...)` -- Online Fortune Cookie Search	[reply] [d/l] [select]
Re: How do I create a reference to an object method? by pc88mxer (Vicar) on Jun 25, 2008 at 19:13 UTC
You could use a string: `my $action = { dosomething => 'something' }; my $method = $action->{dosomething}; $obj->$method(@args);` [download] You could also use a closure: `my $action = { dosomething => sub { shift->something(@_) } }; my $whattodo = $action{dosomething}; $whattodo->($obj, @args);` [download]	[reply] [d/l] [select]
Re^2: How do I create a reference to an object method? by Anonymous Monk on Jun 25, 2008 at 19:32 UTC
I was thinking about that, but I forgot about the arrow for use with hashes! It works, thank you.	[reply]