http://www.perlmonks.org?node_id=833005


in reply to Re: Perl/TK : Passing arguments to the function while clicking submit button
in thread Perl/TK : Passing arguments to the function while clicking submit button

Thanks a lot..
But I want to know why it is working when I called the function without argument and not working with argument.

It will be better if you explain this.

Thanks.
  • Comment on Re^2: Perl/TK : Passing arguments to the function while clicking submit button

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Re^3: Perl/TK : Passing arguments to the function while clicking submit button
by almut (Canon) on Apr 06, 2010 at 10:02 UTC
    why it is working when I called the function without argument

    Presumably because \&function (without parentheses) is a reference to the function, while \&function(...) is a reference to whatever the called function returned. 

    #!/usr/bin/perl -l

sub function {
    return "foo";
}

$command = \&function;
print $command;

$command = \&function();
print "$command -> $$command";

__END__
$ ./833005.pl
CODE(0x604fd0)
SCALAR(0x604290) -> foo

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      Thank you..I understand it.
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Re^3: Perl/TK : Passing arguments to the function while clicking submit button
by choroba (Cardinal) on Apr 06, 2010 at 10:04 UTC
    Could you please be more specific? (A piece of code with both expected and real output would be helpful.)
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