Re: shuffling a list

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1 total messages Started by Nigel Perry Fri, 07 Sep 1990 08:32

#457

Author: Nigel Perry
Date: Fri, 07 Sep 1990 08:32

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Douglas originally said something like "in Scheme I'd list->vector,
shuffle, vector->list", why not do this in a FL? Hope+C code:

	dec shuffle : list(alpha) -> list(alpha);
	--- shuffle l <= vectortolist(shuffle_vector listtovector(l))

where shuffle_vector is your favorite vector shuffling algorithm
(Hope+C provides map_vector & perm_vector H.O. functions to help
you with these.)

Now all we need is the Haskell solution....


Nigel


---
Nigel Perry                                  Department of Computing
                                             Imperial College
Janet: np@uk.ac.ic.doc                       London
ARPA:  np%uk.ac.ic.doc@ucl-cs                SW7
Uucp:  np@icdoc.UUCP, ukc!icdoc!np           England

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