Need help figuring out how to do this. My code:
my %hash;
$hash{'1'}= {'Make' => 'Toyota','Color' => 'Red',};
$hash{'2'}= {'Make' => 'Ford','Color' => 'Blue',};
$hash{'3'}= {'Make' => 'Honda','Color' => 'Yellow',};
&printInfo(%hash);
sub printInfo{
my (%hash) = %_;
foreach my $key (keys %_{
my $a = $_{$key}{'Make'};
my $b = $_{$key}{'Color'};
print "$a $b\n";
}
}
The easy way, which may lead to problems when the code evolves, is simply by assigning the default array @_ (which contains all key-value-pairs as an even list) to the %hash which then rebuilds accordingliy. So your code would look like this:
sub printInfo {
my %hash = @_;
...
}
The better way would be to pass the hash as reference to the subroutine. This way you could still pass more parameters to your subroutine.
printInfo(\%hash);
sub PrintInfo {
my %hash = %{$_[0]};
...
}
An introduction to using references in Perl can be found in the perlreftut