Hi monks,

I've a conditional test that's repeated a number of times in my code. The test is as follows: 

## Perform test and call fraction only if test is true
if ($str =~ /\d+_\d+) {
   $str = fraction($str);
}

### subroutine fraction
sub fraction {
   my $str = shift;
   # convert $str to fraction using mimetex syntax
   return $str;
}

[download]
Should I let the subroutine fraction do the conditional test, as in: 
# Call fraction and perform the conditional test there
$str = fraction($str);

### subroutine fraction
sub fraction {
   my $str = shift;
   if ($str =~ /\d+_\d+) {
      # convert $str to fraction using mimetex syntax
   }
   return $str;
}

[download]
How would you have done it? Which way is better?

Thanks in anticipation :)

In reply to Call sub first or later by kiat

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