Parallel machine

Categories: Idioms | Applicative Functor

There are two reasonable ways to define an applicative functor instance for lists. Both of them simulate kinds of parallel computers:

• The plain instance simulates a non-deterministic computer. This instance can also be generalized to monads.
• The applicative functor instance of the ZipList wrapper simulates a SIMD (single-instruction multiple-data) computer.

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