kan:

As Polonius, GrandFather and Joost mentioned, you normally don't need a linked list in Perl. Using an array, you can do all the same operations. The simple ones:

Add/remove list head: unshift/shift

Add/remove list tail: push/pop

As well as the slightly trickier ones. For a traditional linked list, you'll have a pointer to a node and for the array you'll just have an index into the list. So you can still remove the item you're pointing to:

@list = (@list[0..($ptr-1)], @list[($ptr+1)..$#list]);

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or insert after the pointer:

@list = (@list[0..$ptr], $item_to_insert, @list[($ptr+1)..$#list]);

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Notes:

  • I've not done array splicing for a while, so I might have the syntax a bit off....
  • Range-checking of the pointer before your operations would be a good idea in realcode.

    • So you don't usually need a linked list in Perl (except, of course, for homework assignments).

    ...roboticus

    In reply to Re: implementing linklist structure in perl by roboticus
    in thread implementing linklist structure in perl by kan

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