Abstract
A method of implementing single-ended flexible arrays (stacks) – using a 2-3 tree is studied. This is a step towards studying the possible alternative of using B-trees for allocation within flexible indexible arrays. Two different variants were presented, one using ‘single-heap’ and the other ‘separate heaps’ for 2-nodes and 3-nodes. Algorithms are derived for extending and popping an element from a 2-3 tree.

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