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Re: UNIVERSAL->cando , shortcut for testing and running methods?

by Rhandom (Curate)
on Mar 06, 2009 at 15:14 UTC ( #748884=note: print w/replies, xml ) Need Help??

in reply to UNIVERSAL->cando , shortcut for testing and running methods?

Your examples aren't quite parallel. The first one working with hash assignment uses parallel operations. In the second example you pass a different argument to the second subroutine. If you can afford having real parallelism then there is another option available.
my $meth = $self->can('home') || $self->can('house') || confess(q{Can' +t determine home}); my $home = $self->$meth(1);
Which if you were insistent on having be one line could do
my $home = ($self->can('home') || $self->can('house') || confess(q{Can +'t determine home}))->($self, 1);
I think the first is more clear.

Yet another option is:
my $meth_name = (grep {$self->can($_)} qw(home house))[0] || confess(q +{Can't determine home}); my $home = $self->$meth_name(1);
However this last option is less optimal in readability and in efficiency.

my @a=qw(random brilliant braindead); print $a[rand(@a)];

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