Computers and Technology, 21.02.2020 20:51 lottie2306
Write a function buckets : ('a -> 'a -> bool) -> 'a list -> 'a list list that partitions a list into equivalence classes. That is, buckets equiv lst should return a list of lists where each sublist in the result contains equivalent elements, where two elements are considered equivalent if equiv returns true. For example: buckets (=) [1;2;3;4] = [[1];[2];[3];[4]] buckets (=) [1;2;3;4;2;3;4;3;4] = [[1];[2;2];[3;3;3];[4;4;4]] buckets (fun x y -> (=) (x mod 3) (y mod 3)) [1;2;3;4;5;6] = [[1;4];[2;5];[3;6]] The order of the buckets must reflect the order in which the elements appear in the original list. For example, the output of buckets (=) [1;2;3;4] should be [[1];[2];[3];[4]] and not [[2];[1];[3];[4]] or any other permutation. The order of the elements in each bucket must reflect the order in which the elements appear in the original list. For example, the output of buckets (fun x y -> (=) (x mod 3) (y mod 3)) [1;2;3;4;5;6] should be [[1;4];[2;5];[3;6]] and not [[4;1];[5;2];[3;6]] or any other permutations. Assume that the comparison function ('a -> 'a -> bool) is commutative, associative and idempotent. Just use lists. Do not use sets or hash tables. List append function @ may come in handy. [1;2;3] @ [4;5;6] = [1;2;3;4;5;6].
let buckets p l =
(* YOUR CODE HERE *)
raise (Failure "Not implemented")
assert (buckets (=) [1;2;3;4] = [[1];[2];[3];[4]]);
assert (buckets (=) [1;2;3;4;2;3;4;3;4] = [[1];[2;2];[3;3;3];[4;4;4]]);
assert (buckets (fun x y -> (=) (x mod 3) (y mod 3)) [1;2;3;4;5;6] = [[1;4];[2;5];[3;6]])
Answers: 2
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Two technicians are discussing the common u-joint. technician a says its input and output speeds should be equal. technician b says that it normally has two yokes. which technician is correct?
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Singing in the rain: this first part of the film shows the early history of motion picture. how accurate do you think the portrayal of the early motion picture industry is? why? is historical accuracy important in films and theater productions? explain.
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Computers and Technology, 23.06.2019 00:00, destinysmithds7790
Suppose you have 9 coins and one of them is heavier than others. other 8 coins weight equally. you are also given a balance. develop and algorithm to determine the heavy coin using only two measurements with the of the balance. clearly write your algorithm in the form of a pseudocode using the similar notation that we have used in the class to represent sorting algorithms
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Write a function buckets : ('a -> 'a -> bool) -> 'a list -> 'a list list that partitions...
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