cs 141 final notes

cs 141 final notes - Prolog Info Haskell Info Info Haskell...

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Prolog Info Examples of unification A = A : Succeeds ( tautology ) A = B , B = abc : Both A and B are unified with the xyz = C , C = D : Unification is symmetric abc = abc : Unification succeeds abc = xyz : Fails to unify because the atoms are di f ( A ) = f ( B ) : A is unified with B f ( A ) = g ( B ) : Fails because the heads of the terms f ( A ) = f ( B , C ) : Fails to unify because the terms ha meets_prereqs(Taken, [H|T]) :- member(H, Taken), meets_prereqs(Taken, T). /*lists of courses taken by students*/ courses_taken(john, [cs21, cs22, cs23]). courses_taken(sam, [cs21, cs22, cs23]). coursePlanner(Courses) :- complete_list(L), permutation(L, TempListSelection), check_rules(TempListSelection, Courses), Courses = TempListSelection. The Not sign (!) ‘\+’ Haskell Info e atom abc ifferent are different ave different arity Haskell I //example of header module Homework where //end example //basic haskell function center a b c = if ((length a) >= b) then a else (if (((length a) - b) `mod` 2 == 0 else (center ((c : a)) b c)) //example of splitting lists split a = testTuple a [] [] testTuple [] b c = (([], b) : c)
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