[email protected] wrote:
$hashref->{'users_reference'} does nox exist. I had problems with undef
variables in a hash. I generally put a "scalar" in front of my variables,
this fixes the "undef value in hash"-problem
e.g.
->find_or_create({
...
users_reference => scalar $hashref->{'users_reference'},
...
});
There is no difference between
{
users_reference => $hashref->{'users_reference'},
}
and
{
users_reference => scalar $hashref->{'users_reference'},
}
$hashref->{'users_reference'} is already a scalar. Either way, you will
get the value of $hashref->{'users_reference'}, or undef if the key
doesn't exist.
You're confusing this case with calling a subroutine that could return
an empty list:
{
users_reference => $cgi->param('users_reference'),
}
versus
{
users_reference => scalar $cgi->param('users_reference'),
}
The former snippet will not do the right thing if
$cgi->param('users_reference') returns zero values or more than one
value. scalar() forces it to return a single value.
Ronald
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