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Postings from January 2011
Hi Sunita,
On Mon, Jan 3, 2011 at 2:24 PM, Sunita Rani Pradhan
<Sunita.Pradhan@altair.com> wrote:
> How can I define default arguments in Perl subroutine? Can
> anybody explain with examples?
Sure, the best thing to do is to use named arguments for a subroutine,
by means of using a hash. This is in general better for any subroutine
that uses more than one or two arguments, also because the syntax is
self-explanitory. If you use named arguments you can also use the '||'
operator to assign a value if you don't have one.
For instance, think about a sub like below. If you don't pass the
'status' when adding a user (or if you pass an untrue value), it will
default to 'active'.
=item adduserfoo()
Adds a user to the foo application.
adduserfoo(
email => 'joe@example.com',
password => 'somepass',
status => 'active', # default is active, possible
values: active, inactive.
);
=cut
sub adduserfoo {
my ($param_ref) = @_;
my $email = $param_ref->{email};
my $password = $param_ref->{password};
my $status = $param_ref->{status} || 'active';
# do stuff which adds the user
}
--
Mike.
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