functional-workshop

functional programming principles applied in C#

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Higher Order Functions

Higher Order Functions or HOFs are functions that take other functions as inputs or return a function as output, or both.

using System;
using static System.Console;
using Subtractor = System.Func<int, int, int>;

internal class TestHigherOrderFunctions
{
    private readonly static Subtractor subtractor = (x, y) => x - y;

    internal static void Run() =>
        WriteLine(Generator(subtractor)(44, 2));

    // This is a HOF
    // takes a function as argument
    // and returns a function
    private static Subtractor Generator(Subtractor subtractor)
        => subtractor;
}