Snippets created by Tao Liu
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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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Like the snippet!Posted: 13 years ago by Tao Liu
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Observer pattern
Observer pattern in F#
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Like the snippet!Posted: 13 years ago by Tao Liu
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State Pattern
the interest rate is decided by the internal state: account balance
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Like the snippet!Posted: 13 years ago by Tao Liu
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Command pattern for Redo-Undo
Command pattern for redo-undo scenario.
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Like the snippet!Posted: 13 years ago by Tao Liu
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Singleton Pattern
singleton pattern in F#
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Like the snippet!Posted: 13 years ago by Tao Liu
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Proxy Pattern
Proxy pattern is a class functioning as an interface to something else.
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Like the snippet!Posted: 13 years ago by Tao Liu
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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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Like the snippet!Posted: 13 years ago by Tao Liu
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Template pattern
Template pattern is a behavior-based pattern. Realized the importance of high order function, this is a way to use high order function. Still keep the type structure to organize my code.
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Like the snippet!Posted: 12 years ago by Tao Liu
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WPF Command in F#
demonstrate how to use object expression to create a WPF/Silverlight command.
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Like the snippet!Posted: 12 years ago by Tao Liu
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Decorate pattern
implement the decorate pattern in F#. The decorate pattern is to add new featuures to an object at runtime.
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Like the snippet!Posted: 13 years ago by Tao Liu
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Strategy pattern
Strategy pattern in F#
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Adapter pattern
Invoke the methods from incompatible types
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Like the snippet!Posted: 13 years ago by Tao Liu
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Composite pattern and Visitor Pattern
use composite pattern to construct a tree and visitor pattern to bring back the traverse result.
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Like the snippet!Posted: 13 years ago by Tao Liu
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Factory Pattern
Factory pattern in F#
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Like the snippet!Posted: 13 years ago by Tao Liu
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Chain of responsibility II
Unlike the previous chain of responsibility, this version use the pipeline to chain responsibilities.
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Like the snippet!Posted: 13 years ago by Tao Liu
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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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Like the snippet!Posted: 13 years ago by Tao Liu
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Make a chain of functions
Function composition can be done by using >> operator. The snippet at http://fssnip.net/S is a wonderful sample. But that version generates a function which is not easy when you want to debug. This version is to use pipeline (|>) operator.
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Like the snippet!Posted: 12 years ago by Tao Liu