F# Computation Expressions and Monads

Ever get sick of writing pyramids of doom (callback hell) in JavaScript? Ever get sick of tracing program flow through complex MVC object graphs in Java or C#? These and other problems, common in von Neumann languages, are often difficult to solve cleanly because of the inflexibility of sequentially executed statements.

Functional languages grow out of a model that lacks side effects, thereby making sequencing a foreign concept. To deal with the inevitable side effects the real world forces on otherwise clean functional programs, FP language designers have invented an abstraction that neatly embeds side effects and sequenced operations in a functional world: monads.

In his talk, Faisal Waris will demonstrate how functional languages can be more powerful and flexible imperative languages than imperative languages. Faisal will introduce us to monads and F#'s specific flavor of them, computation expressions. Not only will he help us understand the underlying concept, he'll show how it's enabled elegant solutions to the pyramid of doom, MVC spaghetti, and other problems of modern software development.

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