merge lists in lists with special format


merge lists in lists with special format



I have the following format in Prolog: cars([car([...])])


cars([car([...])])



I would like to merge two cars lists.


cars



I tried:


mergelist(cars(),L,L).
mergelist(cars([car(Car_i)|Cars_i]),Cars_j,cars([car(Car_i)|List])) :-
mergelist(cars(Car_i),Cars_j,cars(List)).



But it doesn't work.
I would like the following example to work:


mergelist(cars([car([type([95], 2.0), type([120], 5.0), type([121], 10.0)]),
car([type([95], 0.4), type([120], 1.0), type([121], 2.0)])]),
cars(car([type([95], 2.0)])),Result).



The output will be:


Result = cars([car([type([95], 2.0), type([120], 5.0), type([121], 10.0)]),
car([type([95], 0.4), type([120], 1.0), type([121], 2.0)])]),
cars(car([type([95], 2.0)]), car([type([95], 2.0)])).



How can I do it?





merglist(cars(), L, L). has first argument is cars(X) where X is a list. mergelist(cars([car(Car_i)|Cars_i]),...) :- has first element cars(X) where X is a list. However, in your call mergelist(cars(Car_i),Cars_j,cars(List))., the first argument to merglist here is cars(Car_i) and Car_i is not a list.
– lurker
Jul 2 at 1:39


merglist(cars(), L, L).


cars(X)


X


mergelist(cars([car(Car_i)|Cars_i]),...) :-


cars(X)


X


mergelist(cars(Car_i),Cars_j,cars(List)).


merglist


cars(Car_i)


Car_i









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