Re^6: Function name in a variable, can't recall the concept (introspection with ->can )

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Re^7: Function name in a variable, can't recall the concept (introspection with ->can ) by LanX (Saint) on Apr 19, 2019 at 12:41 UTC
> get_sub_by_name which get_sub_by_name? Cheers Rolf _{(addicted to the Perl Programming Language :) Wikisyntax for the Monastery FootballPerl is like chess, only without the dice}	[reply]
Re^8: Function name in a variable, can't recall the concept (introspection with ->can ) by Veltro (Hermit) on Apr 19, 2019 at 13:51 UTC
He probably means something hypothetical... I was actually thinking about this seriously, and I would likely do something as: `sub get_sub_by_name { my ($pkg, $name) = @_ ; no strict 'refs' ; if ( exists ${$pkg . '::'}{$name} ) { if ( ref ${$pkg . '::'}{$name} eq 'CODE' ) { return {$pkg . '::' . $name} ; } } ; }` [download] Maybe it can be written more pretty, and I don't know if any odd-cases are trapped (e.g. what about __ANON__) edit*: Comes to think of it, maybe the line 'exists' is not even needed?	[reply] [d/l]
Re^9: Function name in a variable, can't recall the concept (introspection with ->can ) by LanX (Saint) on Apr 19, 2019 at 15:23 UTC
I'm afraid your hypothetical code for his hypothetical function is ignoring how typeglobs work. Cheers Rolf _{(addicted to the Perl Programming Language :) Wikisyntax for the Monastery FootballPerl is like chess, only without the dice}	[reply]
Re^10: Function name in a variable, can't recall the concept (introspection with ->can ) by Veltro (Hermit) on Apr 19, 2019 at 17:30 UTC
Re^11: Function name in a variable, can't recall the concept (introspection with ->can ) by ikegami (Patriarch) on Apr 19, 2019 at 18:06 UTC
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Re^11: Function name in a variable, can't recall the concept (introspection with ->can ) by LanX (Saint) on Apr 19, 2019 at 18:52 UTC
Re^8: Function name in a variable, can't recall the concept (introspection with ->can ) by ikegami (Patriarch) on Apr 19, 2019 at 18:03 UTC
Some code that gets a reference to the sub by name. What that code is doesn't matter, though it could be as simple as `\&{ $pkg . '::' . $name }`.	[reply] [d/l]
Re^9: Function name in a variable, can't recall the concept (introspection with ->can ) by LanX (Saint) on Apr 19, 2019 at 18:28 UTC
> could be as simple as \&{ $pkg . `::` . $name }. nope, this will autovivify a missing ~~function~~ glob $name and return a broken coderef. try again. Cheers Rolf _{(addicted to the Perl Programming Language :) Wikisyntax for the Monastery FootballPerl is like chess, only without the dice}	[reply] [d/l]
Re^10: Function name in a variable, can't recall the concept (introspection with ->can ) by ikegami (Patriarch) on Apr 19, 2019 at 18:41 UTC
Re^11: Function name in a variable, can't recall the concept (introspection with ->can ) by LanX (Saint) on Apr 19, 2019 at 18:45 UTC
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Re^7: Function name in a variable, can't recall the concept (introspection with ->can ) by LanX (Saint) on Apr 20, 2019 at 18:21 UTC
> You're suggesting that we use > `my $sub = @{ get_array_by_name($pkg, 'ISA') } ? get_sub_by_name($pkg, $name) : $pkg->can($name);` No, I don't! Cheers Rolf _{(addicted to the Perl Programming Language :) Wikisyntax for the Monastery FootballPerl is like chess, only without the dice}	[reply] [d/l]
Re^8: Function name in a variable, can't recall the concept (introspection with ->can ) by ikegami (Patriarch) on Apr 21, 2019 at 13:13 UTC
uh, then feel free to clarify why you meant by "one can easily check @ISA".	[reply]
Re^9: Function name in a variable, can't recall the concept (introspection with ->can ) by LanX (Saint) on Apr 21, 2019 at 14:00 UTC
I already explained. But feel free to describe a use case where one might be interested to only call the non-inherited methods of a class, and this without prior knowledge about its OOP nature. In this light try to read again the OP which uses it's own well known package like a "dispatch" table for ordinary functions. Cheers Rolf _{(addicted to the Perl Programming Language :) Wikisyntax for the Monastery FootballPerl is like chess, only without the dice}	[reply]


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