On Wed, Nov 28, 2007 at 02:15:39AM -0800, howa wrote:
> sub abc {
> print 'abc';
> }
print "<", exists &abc, ">\n";
print "<", exists &abcee, ">\n";
> my $f1 = \&abc;
> my $f2 = \&abcee;
>
> print $f1; # return CODE(0x..)
> print $f2; # also return CODE(0x..)
print "<", defined &abc, ">\n";
print "<", defined &abcee, ">\n";
> $f1->();
> $f2->();
>
> How do I know if $f2 is a valid function reference, without actual
> calling it?
perldoc -f exists
perldoc -f defined
Note that a sub exists after taking a reference to it even though it
won't necessarily e defined.
--
Paul Johnson - [EMAIL PROTECTED]
http://www.pjcj.net
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