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  • Projecting lists

    Three functions showing how to implement projection for functional lists. First version uses naive recursion and the second one is tail-recursive using the accumulator parameter. The third version extends this with continuation passing.

    74 people like this

    Posted: 15 years ago by Tomas Petricek

  • Factory Pattern

    Factory pattern in F#

    81 people like this

    Posted: 14 years ago by Tao Liu

  • 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.

    57 people like this

    Posted: 14 years ago by Ryan Riley

  • Implementing active objects with a MailboxProcessor

    Mailbox processors can easily be used to implement active objects. This example shows how to do that with a reusable wrapper type and minimal boilerplate code in the actual class definitions. Supports both asynchronous calls and synchronous calls. For the latter case, exceptions are automatically propagated back to the caller.

    92 people like this

    Posted: 14 years ago by Wolfgang Meyer

  • 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).

    83 people like this

    Posted: 14 years ago by Tao Liu

  • ObservableObject

    The ObservableObject type implements the INotifyPropertyChanged interface used in WPF and Silverlight to notify on changes to properties that are bound to a control. Specify property names type safely using F# Quotations, i.e. <@ this.PropertyName @> when invoking the NotifyPropertyChanged method. If you are following the MVVM pattern then your View Model class can inherit from the ObservableObject type.

    67 people like this

    Posted: 14 years ago by Phillip Trelford

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