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FAQ 4.46 How do I handle linked lists?

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4.46: How do I handle linked lists?

(contributed by brian d foy)

Perl's arrays do not have a fixed size, so you don't need linked lists
if you just want to add or remove items. You can use array operations
such as "push", "pop", "shift", "unshift", or "splice" to do that.

Sometimes, however, linked lists can be useful in situations where you
want to "shard" an array so you have have many small arrays instead of a
single big array. You can keep arrays longer than Perl's largest array
index, lock smaller arrays separately in threaded programs, reallocate
less memory, or quickly insert elements in the middle of the chain.

Steve Lembark goes through the details in his YAPC::NA 2009 talk "Perly
Linked Lists" ( ),
although you can just use his "LinkedList::Single" module.


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