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• Composing a list of functions

  Composition of functions in F# is easily achieved by using the >> operator. You can also chain an arbitary amount of functions (represented as a list or sequence) together by folding the list/seq with >>. [More formally: the set of endomorphisms 'a -> 'a forms a monoid with the binary, associative operator ">>" (or "<<") and the neutral element "id".]

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  Posted: 15 years ago by Novox

• Composable WCF Web API using Async

  A functional wrapper around the new WCF Web APIs (http://wcf.codeplex.com/). Composition is achieved through the use of the HttpRequestMessage -> Async signature. Pushing the app calls in the MessageHandler intercepts all requests and allows you to take control at the earliest point possible before operation selection occurs. Extending this slightly to call the innerChannel's SendAsync would allow you to create a middleware layer that would work both with this and other, normal Web API services.

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  Posted: 15 years ago by Ryan Riley

• A beautiful fixed-point finding function

  We start with an initial value and then applying f repeatedly, until the value does not change anymore.

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  Posted: 15 years ago by Nick Palladinos

• Command pattern for Redo-Undo II

  This command redo-undo implement group the command under Do/Undo category.

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  Posted: 15 years ago by Tao Liu

• Chain of responsibility

  The following sample wants to make sure the person’s age is between 18 and 65, weight is no more than 200 and tall enough (>120).

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  Posted: 15 years ago by Tao Liu

• Continuation-Passing Mnemonics

  Continuations provide a means whereby heap space can be traded for stack depth (heap space being generally more plentiful than stack depth). They are especially useful where tail recursion is not possible. Here are a couple of simple continuation examples that can be extended to cover more complex scenarios.

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  Posted: 15 years ago by Neil Carrier

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