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A pointless derivation of radix sort

Published online by Cambridge University Press:  01 May 1999

JEREMY GIBBONS
Affiliation:
School of Computing and Mathematical Sciences, Oxford Brookes University, Gipsy Lane, Headington, Oxford OX3 0BP, UK (e-mail: jgibbons@brookes.ac.uk)
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Abstract

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This paper is about point-free (or ‘pointless’) calculations – calculations performed at the level of function composition instead of that of function application. We address this topic with the help of an example, namely calculating the radix-sort algorithm from a more obvious specification of sorting. The message that we hope to send is that point-free calculations are sometimes surprisingly simpler than the corresponding point-wise calculations.

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Type
FUNCTIONAL PEARL
Copyright
1999 Cambridge University Press
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