The when has an automatically built in smart match ~~. Nice ...but how can I take profit from this smart match if the parameter passed into given can only be a scalar?

Maybe, but you can check that scalar against a variety of things, not all of them scalars. 

use 5.010;

use strict;
use warnings;

my @x = qw( abc def );

given ("abc") {
   when (@x) { print "when\n";    }
   default   { print "default\n"; }
}

[download]

I have no idea what you are asking.

In reply to Re: Understanding the benefit of Given/When ... by ikegami
in thread Understanding the benefit of Given/When ... by LanX

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