CODEWITHSUNDEEP
listprolog
jakHunter
jakHunter

Reputation: 315

prolog how to remove an element from a list?

I know of the subtract predicate which removes which removes a list of items from a list

subtract([a,b,c,a,b], [a,c], X).

but is there anything like

remove([a,b,c,a,b], a, X).

I know I can modify the above in

subtract([a,b,c,a,b], [a], X).

To achieve the desired result.

But I want to know if there is another way?

EDIT:

@user27815

you did provide a very detailed answer but i'm still very much new to prolog. And perhaps I didn't ask the question correctly(My bad). If there is another way to achieve this.Is it Pre-defined or do I have to define it myself. And can I have an example?

Upvotes: 1

Views: 199

Answers (1)

user27815
user27815

Reputation: 4797

Of course, there are many ways. A good way to do this is to use library reif.

See the answer to this question by repeat:

Delete vowels in a list

There are some general use predicates which are defined that you can adapt to your program.

remove(List,Element,NewList):-
     tinclude(not(list_memberd_truth([Element])),List,NewList).

Upvotes: 3

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