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Simple and efficient purely functional queues and deques

Part of: JFP Research Articles

Published online by Cambridge University Press:  07 November 2008

Chris Okasaki
Chris Okasaki
Affiliation:
School of Computer Science, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, PA 15213, USA (e-mail: [email protected])
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Abstract

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We present purely functional implementations of queues and double-ended queues (deques) requiring only O(1) time per operation in the worst case. Our algorithms are considerably simpler than previous designs with the same bounds. The inspiration for our approach is the incremental behaviour of certain functions on lazy lists.

Type
Articles
Information
Journal of Functional Programming , Volume 5 , Issue 4 , October 1995 , pp. 583 - 592
Copyright
Copyright © Cambridge University Press 1995

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