CS 6110 Lecture 36 A Monadic Approach to
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It is also possible to define monads in terms of two other operations, map : (D → E) → M(D) → M(E) and join : M(M(D))→M(D). This is often the approach taken in category theory, but the definitions are equivalent. We use the notation [σ] to denote unit(σ), and the notation f∗(m) to denote bind(f)(m). Monads figure heavily in the programming language Haskell, which uses monads as a way to introduce impure computation effects into what is otherwise a mostly pure functional language (modulo divergence). The unit operation is called return in Haskell, and the bind operation is written as >>=. Haskell also supports syntactic sugar that makes monads look like imperative code.
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تاریخ انتشار 2013