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• Command pattern for Redo-Undo II

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

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  Posted: 14 years ago by Tao Liu

• WPF / SilverLight Converter II

  version 1 is http://fssnip.net/62. This new version support convert from any existing function to a converter function by using composition and pipeline. The convert function is to make the function signature agree to the IValueConverter interface. You can add new functions in the FunctionLibrary module and reuse the class definition to reduce the coding effort. The first sample is to show how to make the converter pipeline work, the second one is a debugger converter used to debug the data binding problem.

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  Posted: 14 years ago by Tao Liu

• 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

• 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

• 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: 14 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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