a($_) while <DATA>;

for (sort keys %h){
    print "$_: my address is $h{$_}\n";
    print "last:  $h{$_}{'a'} >>> $h{$_}{'a'}{'c'}\n";
    print "next:  $h{$_}{'b'} >>> $h{$_}{'b'}{'c'}\n\n";
}

sub a {
        chomp;
        $t = shift;
        $h{$t}{'a'} = $l;
        $h{$t}{'c'} = $t;
        $$l{'b'} = $h{$t};
        $l = $h{$t};
}

__DATA__
a
b
c
d
e

[download]

output
a: my address is HASH(0x2b230)
last:   >>>
next:  HASH(0x22e44e8) >>> b

b: my address is HASH(0x22e44e8)
last:  HASH(0x2b230) >>> a
next:  HASH(0x22e45d8) >>> c

c: my address is HASH(0x22e45d8)
last:  HASH(0x22e44e8) >>> b
next:  HASH(0x22ef2a0) >>> d

d: my address is HASH(0x22ef2a0)
last:  HASH(0x22e45d8) >>> c
next:  HASH(0x22ef468) >>> e

e: my address is HASH(0x22ef468)
last:  HASH(0x22ef2a0) >>> d
next:   >>>

[download]

In reply to Re: Doubly link list implementation by Lennotoecom
in thread Doubly link list implementation by punitpawar

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