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Piping c# extension methods
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| public static class PipingExtensions | |
| { | |
| /// <summary> | |
| /// Take an object, pipe it into a function, and return the result. | |
| /// </summary> | |
| /// <typeparam name="T"></typeparam> | |
| /// <typeparam name="T2"></typeparam> | |
| /// <param name="obj"></param> | |
| /// <param name="f"></param> | |
| /// <returns></returns> | |
| public static T2 Pipe<T, T2>(this T obj, Func<T, T2> f) | |
| { | |
| return f(obj); | |
| } | |
| /// <summary> | |
| /// Pipes object it into a function, and returns object. | |
| /// </summary> | |
| /// <typeparam name="T"></typeparam> | |
| /// <param name="obj"></param> | |
| /// <param name="f"></param> | |
| /// <remarks>useful for encapsulating procedural void method calls</remarks> | |
| public static T PipeKeep<T>(this T obj, Action<T> f) | |
| { | |
| f(obj); | |
| return obj; | |
| } | |
| /// <summary> | |
| /// Pipes object into a void function (action) | |
| /// </summary> | |
| /// <typeparam name="T"></typeparam> | |
| /// <param name="obj"></param> | |
| /// <param name="f"></param> | |
| /// <remarks>for cases where the output is to be ignored</remarks> | |
| public static void PipeVoid<T>(this T obj, Action<T> f) | |
| { | |
| f(obj); | |
| } | |
| } |
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| //Adapter production usage which parses an NLog log level input and returns a custom enum | |
| private static CustomLogLevel GetCustomLevel(LogLevel input) | |
| { | |
| return input.ToString() | |
| .Pipe(str => Enum.Parse(typeof (SdLogLevel), str)) | |
| .Pipe(o => (CustomLogLevel) o); | |
| // OR: | |
| //return (CustomLogLevel) Enum.Parse(typeof(CustomLogLevel), input.ToString()); | |
| } |
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why should fsharp get all the fun? These are the last extension methods you'll ever need.