len.pl

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description
owner Johannes Waldmann
uploaded 2017-08-17 03:45:17.0
disk size 180 Bytes
downloadable true
type
attribute value
name no_type
processor id 1
description this is the default benchmark type for rejected benchmarks and benchmarks that are not associated with a type.
owning community none
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% Length of a list
% Author: Peter Schneider-Kamp
% terminating

%query: len(i,o).
len([],0) :- !.
len(Xs,s(N)) :- tail(Xs,Ys), len(Ys,N).

tail([],[]).
tail([X|Xs],Xs).
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