sub blah {
my ($foo, $bar, $baz) = @_;
for my $arg (qw( foo bar baz )) {
croak("$arg missing/undefined") if !defined(shift);
}
...
}
I know that I must be missing something here (UPDATE: yup!), but why not just
sub blah {
my ( $foo, $bar, $baz );
for my $arg ( ( $foo, $bar, $baz ) = @_ ) {
croak "You forgot something" unless defined $arg;
}
do_something;
}
or even something like the
List::MoreUtils-flavoured
sub blah {
croak "You forgot something" unless all { defined } ( my ( $foo, $
+bar, $baz ) = @_ );
do_something;
}
That is, why have the
for loop run over the argument list ‘indirectly’ when it's right there to be had?
UPDATE: Indeed, I missed the entirety of the author's point, which was precisely that he wanted more than what his code snippet already did—namely, to detect which, if any, of the relevant variables was already defined.
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