Did you actually test that code? 

$ cat greengaroo.pl 
use strict;

my $ref = sub {
  print "Hello World!\n";
};

# Both are equivalent
$ref->();
&{ref}();
# But which one is best? That is the question!


$ perl greengaroo.pl 
Hello World!
Undefined subroutine &main::ref called at greengaroo.pl line 9.

[download]

your second call fails.

If you fix this by rewriting it thusly: 

&{$ref}();

[download]
there is still the open question of "which is better?" From a readability standpoint I'd vote for the latter rather than the former. Others may disagree but that is the essence of TIMTOWTDI. If you feel there may be a performance issue involved here have you tried profiling the code?

Peter L. Berghold -- Unix Professional
Peter -at- Berghold -dot- Net; AOL IM redcowdawg Yahoo IM: blue_cowdawg

In reply to Re^3: How to call a sub-routine ref by blue_cowdawg
in thread How to call a sub-routine ref by greengaroo

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