The canonical solution to this issue is to use a "Dispatch table".

This is typically a hash whose keys are the text that is used to identify which sub to call, and the value is a reference to the sub. 

my %Dispach_table = (
    UNO => \&Process_One,
    DOS => \&Process_Two,
    TRES => sub { print "This is an example of an in-line subref\n"},
);

sub Process_One{ #whatever
 }

sub Process_Two{ # Some code
}

my $var = "DOS";
# Invoke the dispatch (after verifying it exists)
$Dispatch_table{ $var } or die "ERROR: attempt to dispatch non-existin
+g entry: '$val'";
$Dispatch_table{ $var } -> ( #Parameters, if any
   ); # Here is where the routine gets called.

[download]
Update: Added check for "existence" as recommended by sundialsvc4 (++), below. (Also fixed text typo).

             "I'm fairly sure if they took porn off the Internet, there'd only be one website left, and it'd be called 'Bring Back the Porn!'"
        -- Dr. Cox, Scrubs

In reply to Re: Call subroutine by reference ? by NetWallah
in thread Call subroutine by reference ? by JockoHelios

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