James's Blog

Perl: references of array/hash/scalar

# create variables
$a = "world";
@array = (10,20,30);
%hash = ("james"=>"pei", "lisa"=>"han");

# create references to them
$ra = \$a;
$rarray= \@array;
$rhash = \%hash;

# create references to constant scalars
$ra = \10;
$rs = \"hello world";

# references to scalars
$ra = \$a;
$$ra += 2;
print $$ra;

# references to Hashes
$rhash = \%hash;
print $rhash->{"key1"};

posted by James Pei @ 11:04 AM