Invoke a method on an object

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

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Re: Invoke a method on an object by Corion (Patriarch) on Jan 13, 2009 at 10:19 UTC
The easiest way is to do this: `$obj->$method(@args)` [download] But you can also call the code reference you got back from `->can`: `my $method = $obj->can($method_name); $method->( $obj, @args );` [download] As `$method` is not bound to `$obj`, you have to supply `$obj` as the first parameter.	[reply] [d/l] [select]
Re^2: Invoke a method on an object by thedi (Acolyte) on Jan 13, 2009 at 11:26 UTC
Thanks, thats all I need Best regards Thedi	[reply]
Re^2: Invoke a method on an object by pobocks (Chaplain) on Jan 13, 2009 at 15:32 UTC
Since I believe he is talking about $method being a string, wouldn't the first version need `no strict 'refs'`, and a leading ampersand? `for(split(" ","tsuJ rehtonA lreP rekcaH")){print reverse . " "}print "\b.\n";`	[reply] [d/l] [select]
Re^3: Invoke a method on an object by Corion (Patriarch) on Jan 13, 2009 at 15:36 UTC
No: `perl -Mstrict -le "sub P::p{print 'p'};my $p=bless {},'P';my $m='p';$p +->$m;"` [download]	[reply] [d/l]
Re^4: Invoke a method on an object by pobocks (Chaplain) on Jan 13, 2009 at 15:38 UTC
Re^5: Invoke a method on an object by merlyn (Sage) on Jan 13, 2009 at 15:59 UTC
Some notes below your chosen depth have not been shown here
Re: Invoke a method on an object by moritz (Cardinal) on Jan 13, 2009 at 10:18 UTC
`$obj->can( $method )` returns a sub ref that you can execute like this: `$obj->can( $method )->($obj, @args)`. See the UNIVERSAL documentation for details (can, isa and the likes are defined there).	[reply] [d/l] [select]
Re: Invoke a method on an object by Bloodnok (Vicar) on Jan 13, 2009 at 12:10 UTC
More of a comment on my continuing inadequacies, but hey, here goes... I seem to recall trying the `can()` approach recommended by both Corion & moritz, but the attempt failed and have not tried it since. In retrospect, I only now (it _was_ a number of years ago) realise that my attempt didn't include the class/object ref. as the first arg - Doh !!! Or, put another way, it's nice to have one, or more, of our learned friends/colleagues/monks to occasionally point out the obvious :D I'll bet it doesn't apply here, but one thing to beware of, as was pointed out for me elsewhere, is that using either `isa` or `can` as the method name will undoubtedly cause problems (see Arrgh, can() appears to work for non-object !! for details). A user level that continues to overstate my experience :-))	[reply] [d/l] [select]